/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops/for_bounded_loop1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 06:52:06,575 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 06:52:06,579 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 06:52:06,629 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 06:52:06,629 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 06:52:06,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 06:52:06,643 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 06:52:06,647 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 06:52:06,650 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 06:52:06,654 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 06:52:06,655 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 06:52:06,656 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 06:52:06,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 06:52:06,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 06:52:06,664 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 06:52:06,666 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 06:52:06,668 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 06:52:06,669 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 06:52:06,671 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 06:52:06,681 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 06:52:06,683 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 06:52:06,684 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 06:52:06,686 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 06:52:06,687 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 06:52:06,689 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 06:52:06,689 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 06:52:06,689 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 06:52:06,690 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 06:52:06,691 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 06:52:06,692 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 06:52:06,692 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 06:52:06,693 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 06:52:06,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 06:52:06,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 06:52:06,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 06:52:06,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 06:52:06,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 06:52:06,697 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 06:52:06,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 06:52:06,698 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 06:52:06,699 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 06:52:06,700 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 [2020-09-25 06:52:06,727 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 06:52:06,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 06:52:06,729 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 06:52:06,729 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 06:52:06,729 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 06:52:06,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 06:52:06,730 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 06:52:06,730 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 06:52:06,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 06:52:06,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 06:52:06,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 06:52:06,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 06:52:06,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 06:52:06,731 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 06:52:06,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 06:52:06,732 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 06:52:06,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 06:52:06,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 06:52:06,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 06:52:06,733 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 06:52:06,733 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 06:52:06,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:52:06,734 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 06:52:06,734 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 06:52:06,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 06:52:06,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 06:52:06,735 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 06:52:06,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 06:52:06,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 06:52:06,735 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-09-25 06:52:07,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 06:52:07,212 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 06:52:07,217 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 06:52:07,220 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 06:52:07,221 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 06:52:07,222 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 06:52:07,310 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/936775b10/aa53fd93b9c4487aaf8ef6bb6638f924/FLAGb992656a1 [2020-09-25 06:52:07,849 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 06:52:07,850 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/for_bounded_loop1.c [2020-09-25 06:52:07,859 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/936775b10/aa53fd93b9c4487aaf8ef6bb6638f924/FLAGb992656a1 [2020-09-25 06:52:08,198 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/936775b10/aa53fd93b9c4487aaf8ef6bb6638f924 [2020-09-25 06:52:08,212 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 06:52:08,218 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 06:52:08,220 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 06:52:08,220 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 06:52:08,224 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 06:52:08,225 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:52:08" (1/1) ... [2020-09-25 06:52:08,230 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@674884e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:08, skipping insertion in model container [2020-09-25 06:52:08,231 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 06:52:08" (1/1) ... [2020-09-25 06:52:08,241 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 06:52:08,266 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 06:52:08,474 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:52:08,480 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 06:52:08,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 06:52:08,521 INFO L208 MainTranslator]: Completed translation [2020-09-25 06:52:08,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:08 WrapperNode [2020-09-25 06:52:08,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 06:52:08,522 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 06:52:08,523 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 06:52:08,523 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 06:52:08,537 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:08" (1/1) ... [2020-09-25 06:52:08,537 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:08" (1/1) ... [2020-09-25 06:52:08,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:08" (1/1) ... [2020-09-25 06:52:08,626 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:08" (1/1) ... [2020-09-25 06:52:08,631 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:08" (1/1) ... [2020-09-25 06:52:08,638 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:08" (1/1) ... [2020-09-25 06:52:08,644 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:08" (1/1) ... [2020-09-25 06:52:08,646 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 06:52:08,647 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 06:52:08,647 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 06:52:08,647 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 06:52:08,648 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:08" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 06:52:08,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 06:52:08,720 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 06:52:08,720 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 06:52:08,720 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 06:52:08,721 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 06:52:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 06:52:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 06:52:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 06:52:08,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 06:52:08,722 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 06:52:08,722 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 06:52:08,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 06:52:08,722 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 06:52:09,007 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 06:52:09,008 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 06:52:09,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:52:09 BoogieIcfgContainer [2020-09-25 06:52:09,028 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 06:52:09,033 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 06:52:09,033 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 06:52:09,041 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 06:52:09,041 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 06:52:08" (1/3) ... [2020-09-25 06:52:09,042 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b17fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:52:09, skipping insertion in model container [2020-09-25 06:52:09,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 06:52:08" (2/3) ... [2020-09-25 06:52:09,043 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b17fbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 06:52:09, skipping insertion in model container [2020-09-25 06:52:09,043 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 06:52:09" (3/3) ... [2020-09-25 06:52:09,049 INFO L109 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2020-09-25 06:52:09,077 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 06:52:09,093 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 06:52:09,114 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 06:52:09,142 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 06:52:09,143 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 06:52:09,143 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 06:52:09,143 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 06:52:09,143 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 06:52:09,143 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 06:52:09,143 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 06:52:09,143 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 06:52:09,165 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-09-25 06:52:09,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 06:52:09,175 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:09,176 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:09,176 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:09,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:09,183 INFO L82 PathProgramCache]: Analyzing trace with hash 546510172, now seen corresponding path program 1 times [2020-09-25 06:52:09,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:09,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642024214] [2020-09-25 06:52:09,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:09,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:09,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:09,467 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:09,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 06:52:09,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:52:09,468 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 158 [2020-09-25 06:52:09,472 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:09,472 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:09,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:09,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 06:52:09,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:09,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-09-25 06:52:09,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:09,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:09,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:09,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:52:09,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:09,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 06:52:09,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:09,512 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:09,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:09,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:09,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:09,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:09,521 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642024214] [2020-09-25 06:52:09,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:52:09,524 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 06:52:09,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806434966] [2020-09-25 06:52:09,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 06:52:09,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:09,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 06:52:09,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 06:52:09,563 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-09-25 06:52:09,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:09,594 INFO L93 Difference]: Finished difference Result 61 states and 75 transitions. [2020-09-25 06:52:09,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 06:52:09,595 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 17 [2020-09-25 06:52:09,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:09,606 INFO L225 Difference]: With dead ends: 61 [2020-09-25 06:52:09,607 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 06:52:09,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 06:52:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 06:52:09,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-09-25 06:52:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-25 06:52:09,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2020-09-25 06:52:09,659 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 17 [2020-09-25 06:52:09,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:09,659 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2020-09-25 06:52:09,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 06:52:09,660 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2020-09-25 06:52:09,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 06:52:09,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:09,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:09,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 06:52:09,662 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:09,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:09,663 INFO L82 PathProgramCache]: Analyzing trace with hash 528039752, now seen corresponding path program 1 times [2020-09-25 06:52:09,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:09,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300066682] [2020-09-25 06:52:09,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:09,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:09,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:09,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:09,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 06:52:09,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:52:09,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-09-25 06:52:09,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:09,839 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:09,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 06:52:09,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 06:52:09,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 06:52:09,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:09,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:09,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:09,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:09,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:52:09,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:09,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 06:52:09,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:09,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:09,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:09,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:09,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:09,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:09,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300066682] [2020-09-25 06:52:09,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:52:09,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 06:52:09,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008379937] [2020-09-25 06:52:09,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 06:52:09,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:09,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 06:52:09,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 06:52:09,915 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand 5 states. [2020-09-25 06:52:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:09,987 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-09-25 06:52:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 06:52:09,988 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-09-25 06:52:09,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:09,989 INFO L225 Difference]: With dead ends: 40 [2020-09-25 06:52:09,990 INFO L226 Difference]: Without dead ends: 33 [2020-09-25 06:52:09,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:52:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-09-25 06:52:09,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-09-25 06:52:09,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-25 06:52:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-09-25 06:52:09,999 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 17 [2020-09-25 06:52:10,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:10,000 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-09-25 06:52:10,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 06:52:10,000 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-09-25 06:52:10,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-25 06:52:10,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:10,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:10,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 06:52:10,002 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:10,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:10,003 INFO L82 PathProgramCache]: Analyzing trace with hash -789875431, now seen corresponding path program 1 times [2020-09-25 06:52:10,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:10,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183491173] [2020-09-25 06:52:10,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:10,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:10,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:10,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-25 06:52:10,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:10,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-09-25 06:52:10,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:10,122 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:10,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 06:52:10,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 06:52:10,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 06:52:10,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:10,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:10,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:10,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:10,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:10,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:52:10,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:10,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:52:10,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:10,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:10,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:10,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:10,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:10,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183491173] [2020-09-25 06:52:10,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:52:10,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 06:52:10,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596400249] [2020-09-25 06:52:10,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 06:52:10,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:10,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 06:52:10,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 06:52:10,259 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 6 states. [2020-09-25 06:52:10,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:10,391 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-25 06:52:10,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 06:52:10,392 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-09-25 06:52:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:10,393 INFO L225 Difference]: With dead ends: 42 [2020-09-25 06:52:10,393 INFO L226 Difference]: Without dead ends: 40 [2020-09-25 06:52:10,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:52:10,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-25 06:52:10,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 36. [2020-09-25 06:52:10,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 06:52:10,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 06:52:10,405 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 18 [2020-09-25 06:52:10,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:10,406 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 06:52:10,406 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 06:52:10,406 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 06:52:10,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-25 06:52:10,407 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:10,408 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:10,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 06:52:10,408 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:10,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:10,409 INFO L82 PathProgramCache]: Analyzing trace with hash -1565658423, now seen corresponding path program 1 times [2020-09-25 06:52:10,409 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:10,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363495864] [2020-09-25 06:52:10,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:10,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:10,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:11,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:11,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-25 06:52:11,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:52:11,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-09-25 06:52:11,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:11,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:11,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 06:52:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 06:52:11,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 06:52:11,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:11,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 06:52:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:11,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:11,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:11,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 06:52:11,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 06:52:11,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 06:52:11,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:11,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:11,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 06:52:11,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:11,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 06:52:11,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:11,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-09-25 06:52:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 06:52:11,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:11,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 06:52:11,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 06:52:11,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-09-25 06:52:11,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 06:52:11,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-25 06:52:11,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 06:52:11,261 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-09-25 06:52:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 06:52:11,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 06:52:11,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-25 06:52:11,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 06:52:11,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 06:52:11,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363495864] [2020-09-25 06:52:11,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 06:52:11,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-25 06:52:11,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288171398] [2020-09-25 06:52:11,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 06:52:11,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 06:52:11,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 06:52:11,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-09-25 06:52:11,270 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 8 states. [2020-09-25 06:52:11,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 06:52:11,442 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-25 06:52:11,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 06:52:11,443 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-09-25 06:52:11,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 06:52:11,444 INFO L225 Difference]: With dead ends: 46 [2020-09-25 06:52:11,444 INFO L226 Difference]: Without dead ends: 42 [2020-09-25 06:52:11,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-25 06:52:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-25 06:52:11,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2020-09-25 06:52:11,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-25 06:52:11,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2020-09-25 06:52:11,453 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 28 [2020-09-25 06:52:11,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 06:52:11,454 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2020-09-25 06:52:11,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 06:52:11,454 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2020-09-25 06:52:11,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-25 06:52:11,456 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 06:52:11,456 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 06:52:11,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 06:52:11,457 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 06:52:11,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 06:52:11,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1612602333, now seen corresponding path program 1 times [2020-09-25 06:52:11,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 06:52:11,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954887318] [2020-09-25 06:52:11,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 06:52:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-25 06:52:11,472 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-25 06:52:11,472 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-25 06:52:11,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 06:52:11,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 06:52:11 BoogieIcfgContainer [2020-09-25 06:52:11,504 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 06:52:11,509 INFO L168 Benchmark]: Toolchain (without parser) took 3292.73 ms. Allocated memory was 140.0 MB in the beginning and 235.9 MB in the end (delta: 95.9 MB). Free memory was 102.6 MB in the beginning and 138.8 MB in the end (delta: -36.2 MB). Peak memory consumption was 59.7 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:11,510 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-25 06:52:11,511 INFO L168 Benchmark]: CACSL2BoogieTranslator took 302.43 ms. Allocated memory is still 140.0 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:11,512 INFO L168 Benchmark]: Boogie Preprocessor took 123.88 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 92.4 MB in the beginning and 182.2 MB in the end (delta: -89.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:11,513 INFO L168 Benchmark]: RCFGBuilder took 381.46 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 167.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:11,514 INFO L168 Benchmark]: TraceAbstraction took 2471.13 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 167.9 MB in the beginning and 138.8 MB in the end (delta: 29.1 MB). Peak memory consumption was 61.6 MB. Max. memory is 7.1 GB. [2020-09-25 06:52:11,518 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 120.2 MB in the beginning and 120.0 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 302.43 ms. Allocated memory is still 140.0 MB. Free memory was 101.9 MB in the beginning and 92.4 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.88 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 92.4 MB in the beginning and 182.2 MB in the end (delta: -89.8 MB). Peak memory consumption was 12.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 381.46 ms. Allocated memory is still 203.4 MB. Free memory was 181.5 MB in the beginning and 167.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2471.13 ms. Allocated memory was 203.4 MB in the beginning and 235.9 MB in the end (delta: 32.5 MB). Free memory was 167.9 MB in the beginning and 138.8 MB in the end (delta: 29.1 MB). Peak memory consumption was 61.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 9]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int i=0, x=0, y=0; [L18] int n=__VERIFIER_nondet_int(); [L19] COND FALSE !(!(n>0)) [L20] i=0 [L20] COND TRUE i