/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 05:28:49,337 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 05:28:49,339 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 05:28:49,367 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 05:28:49,367 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 05:28:49,368 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 05:28:49,370 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 05:28:49,375 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 05:28:49,377 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 05:28:49,378 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 05:28:49,378 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 05:28:49,379 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 05:28:49,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 05:28:49,380 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 05:28:49,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 05:28:49,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 05:28:49,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 05:28:49,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 05:28:49,391 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 05:28:49,393 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 05:28:49,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 05:28:49,397 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 05:28:49,398 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 05:28:49,399 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 05:28:49,404 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 05:28:49,404 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 05:28:49,404 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 05:28:49,408 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 05:28:49,409 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 05:28:49,418 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 05:28:49,419 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 05:28:49,419 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 05:28:49,420 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 05:28:49,421 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 05:28:49,422 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 05:28:49,422 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 05:28:49,423 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 05:28:49,423 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 05:28:49,423 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 05:28:49,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 05:28:49,425 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 05:28:49,426 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 [2020-10-14 05:28:49,464 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 05:28:49,465 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 05:28:49,466 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 05:28:49,467 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 05:28:49,467 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 05:28:49,467 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 05:28:49,467 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 05:28:49,467 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 05:28:49,468 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 05:28:49,468 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 05:28:49,469 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 05:28:49,469 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 05:28:49,469 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 05:28:49,470 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 05:28:49,470 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 05:28:49,470 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 05:28:49,470 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 05:28:49,471 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 05:28:49,471 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 05:28:49,471 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 05:28:49,471 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 05:28:49,471 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 05:28:49,472 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 05:28:49,472 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 05:28:49,472 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 05:28:49,472 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 05:28:49,472 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 05:28:49,473 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 05:28:49,473 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 05:28:49,473 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 05:28:49,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 05:28:49,797 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 05:28:49,800 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 05:28:49,801 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 05:28:49,802 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 05:28:49,803 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c [2020-10-14 05:28:49,863 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da336aa83/2710bb7bf1c045bb8c733a56d5c4db11/FLAG96bfa191c [2020-10-14 05:28:50,270 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 05:28:50,270 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_11.c [2020-10-14 05:28:50,276 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da336aa83/2710bb7bf1c045bb8c733a56d5c4db11/FLAG96bfa191c [2020-10-14 05:28:50,690 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/da336aa83/2710bb7bf1c045bb8c733a56d5c4db11 [2020-10-14 05:28:50,698 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 05:28:50,700 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 05:28:50,702 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 05:28:50,702 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 05:28:50,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 05:28:50,707 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:28:50" (1/1) ... [2020-10-14 05:28:50,710 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68ad693f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:28:50, skipping insertion in model container [2020-10-14 05:28:50,710 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 05:28:50" (1/1) ... [2020-10-14 05:28:50,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 05:28:50,734 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 05:28:50,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:28:50,903 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 05:28:50,918 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 05:28:50,933 INFO L208 MainTranslator]: Completed translation [2020-10-14 05:28:50,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:28:50 WrapperNode [2020-10-14 05:28:50,933 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 05:28:50,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 05:28:50,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 05:28:50,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 05:28:50,948 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:28:50" (1/1) ... [2020-10-14 05:28:50,948 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:28:50" (1/1) ... [2020-10-14 05:28:50,953 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:28:50" (1/1) ... [2020-10-14 05:28:50,954 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:28:50" (1/1) ... [2020-10-14 05:28:51,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:28:50" (1/1) ... [2020-10-14 05:28:51,041 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:28:50" (1/1) ... [2020-10-14 05:28:51,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:28:50" (1/1) ... [2020-10-14 05:28:51,043 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 05:28:51,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 05:28:51,044 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 05:28:51,044 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 05:28:51,045 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:28:50" (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 [2020-10-14 05:28:51,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 05:28:51,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 05:28:51,113 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-14 05:28:51,113 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 05:28:51,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 05:28:51,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-14 05:28:51,113 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 05:28:51,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 05:28:51,114 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 05:28:51,283 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 05:28:51,283 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-14 05:28:51,286 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:28:51 BoogieIcfgContainer [2020-10-14 05:28:51,287 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 05:28:51,288 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 05:28:51,288 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 05:28:51,291 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 05:28:51,291 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 05:28:50" (1/3) ... [2020-10-14 05:28:51,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19aafed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:28:51, skipping insertion in model container [2020-10-14 05:28:51,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 05:28:50" (2/3) ... [2020-10-14 05:28:51,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19aafed5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 05:28:51, skipping insertion in model container [2020-10-14 05:28:51,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 05:28:51" (3/3) ... [2020-10-14 05:28:51,294 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_11.c [2020-10-14 05:28:51,305 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 05:28:51,312 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 05:28:51,325 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 05:28:51,349 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 05:28:51,349 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 05:28:51,349 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 05:28:51,350 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 05:28:51,350 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 05:28:51,350 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 05:28:51,350 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 05:28:51,350 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 05:28:51,369 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2020-10-14 05:28:51,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:28:51,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:51,376 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:51,377 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:51,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:51,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1712329921, now seen corresponding path program 1 times [2020-10-14 05:28:51,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:51,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587571834] [2020-10-14 05:28:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:51,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:51,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:51,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:51,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:51,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:28:51,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:51,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 198 [2020-10-14 05:28:51,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:51,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:51,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:51,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 05:28:51,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:51,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 05:28:51,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:51,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:51,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:51,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:51,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:51,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 05:28:51,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:51,686 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:51,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:51,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:51,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:51,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:51,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:51,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587571834] [2020-10-14 05:28:51,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:28:51,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-14 05:28:51,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776732784] [2020-10-14 05:28:51,706 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-10-14 05:28:51,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:51,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-10-14 05:28:51,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-10-14 05:28:51,720 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2020-10-14 05:28:51,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:51,738 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2020-10-14 05:28:51,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-10-14 05:28:51,739 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-10-14 05:28:51,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:51,746 INFO L225 Difference]: With dead ends: 31 [2020-10-14 05:28:51,746 INFO L226 Difference]: Without dead ends: 12 [2020-10-14 05:28:51,749 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 [2020-10-14 05:28:51,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-10-14 05:28:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-10-14 05:28:51,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-10-14 05:28:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2020-10-14 05:28:51,779 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 10 [2020-10-14 05:28:51,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:51,779 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2020-10-14 05:28:51,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-10-14 05:28:51,780 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2020-10-14 05:28:51,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-14 05:28:51,780 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:51,780 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:51,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 05:28:51,781 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:51,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:51,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2020-10-14 05:28:51,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:51,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132420107] [2020-10-14 05:28:51,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:51,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:51,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:51,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:51,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:51,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-14 05:28:51,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 05:28:51,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 195 [2020-10-14 05:28:51,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:51,992 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:28:51,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:51,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:28:51,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:52,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:52,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:52,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:52,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:52,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:52,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:52,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-14 05:28:52,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:52,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:52,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:52,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:52,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:52,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 05:28:52,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:52,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132420107] [2020-10-14 05:28:52,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:28:52,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:28:52,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123719776] [2020-10-14 05:28:52,058 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:28:52,058 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:52,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:28:52,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:28:52,059 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand 3 states. [2020-10-14 05:28:52,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:52,082 INFO L93 Difference]: Finished difference Result 21 states and 25 transitions. [2020-10-14 05:28:52,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:28:52,083 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-14 05:28:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:52,084 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:28:52,084 INFO L226 Difference]: Without dead ends: 14 [2020-10-14 05:28:52,085 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 [2020-10-14 05:28:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-10-14 05:28:52,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-10-14 05:28:52,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-10-14 05:28:52,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-10-14 05:28:52,091 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 10 [2020-10-14 05:28:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:52,092 INFO L479 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-10-14 05:28:52,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:28:52,093 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-10-14 05:28:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-14 05:28:52,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:52,094 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:52,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 05:28:52,095 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:52,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:52,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1337256884, now seen corresponding path program 1 times [2020-10-14 05:28:52,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:52,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012342233] [2020-10-14 05:28:52,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:52,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:52,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:52,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:52,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-14 05:28:52,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:52,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-10-14 05:28:52,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:52,176 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:52,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 05:28:52,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 05:28:52,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 05:28:52,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:52,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:52,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:52,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:52,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:52,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:52,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:28:52,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:52,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:52,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:52,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:52,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:52,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:52,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:52,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012342233] [2020-10-14 05:28:52,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 05:28:52,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-14 05:28:52,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024083875] [2020-10-14 05:28:52,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-14 05:28:52,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:52,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-14 05:28:52,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-14 05:28:52,211 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 3 states. [2020-10-14 05:28:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:52,269 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2020-10-14 05:28:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-14 05:28:52,271 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-14 05:28:52,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:52,272 INFO L225 Difference]: With dead ends: 21 [2020-10-14 05:28:52,272 INFO L226 Difference]: Without dead ends: 16 [2020-10-14 05:28:52,272 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 [2020-10-14 05:28:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-14 05:28:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-10-14 05:28:52,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-14 05:28:52,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-14 05:28:52,280 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-14 05:28:52,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:52,280 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-14 05:28:52,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-14 05:28:52,281 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-14 05:28:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-14 05:28:52,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:52,282 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:52,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 05:28:52,282 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:52,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:52,283 INFO L82 PathProgramCache]: Analyzing trace with hash 2011681711, now seen corresponding path program 1 times [2020-10-14 05:28:52,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:52,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019188788] [2020-10-14 05:28:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:52,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:52,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:52,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:52,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:52,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:52,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-14 05:28:52,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:28:52,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 212 [2020-10-14 05:28:52,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:52,506 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:28:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:52,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 05:28:52,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:52,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:52,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:52,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:52,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:52,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:52,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:28:52,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:52,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:52,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:52,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:52,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:52,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:52,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019188788] [2020-10-14 05:28:52,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:52,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:28:52,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637487415] [2020-10-14 05:28:52,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:28:52,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:52,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:28:52,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:28:52,564 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-14 05:28:52,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:52,590 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-14 05:28:52,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:28:52,590 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-10-14 05:28:52,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:52,591 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:28:52,591 INFO L226 Difference]: Without dead ends: 17 [2020-10-14 05:28:52,592 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 [2020-10-14 05:28:52,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-14 05:28:52,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-14 05:28:52,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-14 05:28:52,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-14 05:28:52,598 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 14 [2020-10-14 05:28:52,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:52,598 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-14 05:28:52,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:28:52,598 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-14 05:28:52,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-14 05:28:52,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:52,599 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:52,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 05:28:52,600 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:52,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:52,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1891741908, now seen corresponding path program 2 times [2020-10-14 05:28:52,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:52,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145507773] [2020-10-14 05:28:52,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:52,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:52,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:52,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:52,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:52,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-14 05:28:52,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:28:52,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-14 05:28:52,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:52,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:52,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:28:52,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:52,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-14 05:28:52,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-14 05:28:52,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:52,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:52,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:52,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:52,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:52,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:28:52,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:52,983 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:52,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:52,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:52,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:52,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:52,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 05:28:52,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145507773] [2020-10-14 05:28:52,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:52,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:28:52,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758151904] [2020-10-14 05:28:52,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:28:52,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:52,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:28:52,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:28:52,992 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-14 05:28:53,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:53,042 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 05:28:53,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 05:28:53,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-14 05:28:53,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:53,044 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:28:53,045 INFO L226 Difference]: Without dead ends: 19 [2020-10-14 05:28:53,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:28:53,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-14 05:28:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-14 05:28:53,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-14 05:28:53,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-14 05:28:53,058 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 16 [2020-10-14 05:28:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:53,059 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-14 05:28:53,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:28:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-14 05:28:53,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-14 05:28:53,060 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:53,060 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:53,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 05:28:53,062 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:53,063 INFO L82 PathProgramCache]: Analyzing trace with hash 719576937, now seen corresponding path program 3 times [2020-10-14 05:28:53,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:53,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1277195160] [2020-10-14 05:28:53,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:53,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:53,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:53,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:53,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:53,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:53,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-14 05:28:53,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:28:53,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-14 05:28:53,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:53,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:53,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 05:28:53,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 05:28:53,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 05:28:53,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:53,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:53,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:53,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:53,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:53,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:53,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:53,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:28:53,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:53,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:53,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:53,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:53,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:53,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 05:28:53,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1277195160] [2020-10-14 05:28:53,526 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:53,526 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-14 05:28:53,526 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961810027] [2020-10-14 05:28:53,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 05:28:53,527 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:53,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 05:28:53,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-14 05:28:53,528 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 4 states. [2020-10-14 05:28:53,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:53,562 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-14 05:28:53,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 05:28:53,563 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-10-14 05:28:53,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:53,565 INFO L225 Difference]: With dead ends: 27 [2020-10-14 05:28:53,566 INFO L226 Difference]: Without dead ends: 22 [2020-10-14 05:28:53,566 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 [2020-10-14 05:28:53,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-10-14 05:28:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-10-14 05:28:53,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-14 05:28:53,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2020-10-14 05:28:53,573 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 18 [2020-10-14 05:28:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:53,574 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2020-10-14 05:28:53,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 05:28:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2020-10-14 05:28:53,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-14 05:28:53,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:53,575 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:53,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 05:28:53,576 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:53,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:53,576 INFO L82 PathProgramCache]: Analyzing trace with hash 1126739492, now seen corresponding path program 4 times [2020-10-14 05:28:53,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:53,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [422250601] [2020-10-14 05:28:53,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:53,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:53,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:53,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:53,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:53,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:53,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-14 05:28:53,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:28:53,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-14 05:28:53,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:53,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:53,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-14 05:28:53,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-14 05:28:53,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 05:28:53,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:54,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:54,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:54,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:54,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:54,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:54,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:28:54,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:54,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:54,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:54,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:54,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:54,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:54,039 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-14 05:28:54,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [422250601] [2020-10-14 05:28:54,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:54,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:28:54,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308394263] [2020-10-14 05:28:54,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:28:54,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:54,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:28:54,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:28:54,042 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2020-10-14 05:28:54,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:54,085 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:28:54,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:28:54,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-14 05:28:54,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:54,087 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:28:54,087 INFO L226 Difference]: Without dead ends: 23 [2020-10-14 05:28:54,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:28:54,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-14 05:28:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-14 05:28:54,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-14 05:28:54,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2020-10-14 05:28:54,094 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2020-10-14 05:28:54,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:54,094 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2020-10-14 05:28:54,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:28:54,095 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2020-10-14 05:28:54,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-14 05:28:54,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:54,096 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:54,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 05:28:54,096 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:54,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:54,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1960957921, now seen corresponding path program 5 times [2020-10-14 05:28:54,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:54,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066071770] [2020-10-14 05:28:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:54,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:54,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:54,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:54,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:54,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:54,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-14 05:28:54,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:28:54,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 405 [2020-10-14 05:28:54,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:54,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:54,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 05:28:54,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:28:54,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-14 05:28:54,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:54,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:54,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:54,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:54,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:54,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:54,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:28:54,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:54,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:54,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:54,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:54,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:54,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:54,607 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-14 05:28:54,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066071770] [2020-10-14 05:28:54,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:54,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 05:28:54,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094644259] [2020-10-14 05:28:54,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 05:28:54,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:54,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 05:28:54,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 05:28:54,609 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 5 states. [2020-10-14 05:28:54,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:54,802 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-10-14 05:28:54,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 05:28:54,802 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-14 05:28:54,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:54,803 INFO L225 Difference]: With dead ends: 33 [2020-10-14 05:28:54,804 INFO L226 Difference]: Without dead ends: 28 [2020-10-14 05:28:54,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:28:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-14 05:28:54,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2020-10-14 05:28:54,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-14 05:28:54,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-14 05:28:54,810 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 22 [2020-10-14 05:28:54,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:54,811 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-14 05:28:54,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 05:28:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-14 05:28:54,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-14 05:28:54,812 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 05:28:54,812 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 05:28:54,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 05:28:54,812 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 05:28:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 05:28:54,813 INFO L82 PathProgramCache]: Analyzing trace with hash 92956828, now seen corresponding path program 6 times [2020-10-14 05:28:54,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 05:28:54,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719310590] [2020-10-14 05:28:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 05:28:54,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:54,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:54,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:55,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:55,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:55,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-14 05:28:55,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-14 05:28:55,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 593 [2020-10-14 05:28:55,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:55,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:55,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-14 05:28:55,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-14 05:28:55,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 05:28:55,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:55,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 05:28:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 05:28:55,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 05:28:55,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 05:28:55,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-14 05:28:55,519 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 05:28:55,519 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-14 05:28:55,519 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 05:28:55,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 05:28:55,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 05:28:55,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 05:28:55,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 05:28:55,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 05:28:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-14 05:28:55,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719310590] [2020-10-14 05:28:55,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 05:28:55,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 05:28:55,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567493301] [2020-10-14 05:28:55,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 05:28:55,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 05:28:55,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 05:28:55,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 05:28:55,532 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 6 states. [2020-10-14 05:28:55,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 05:28:55,614 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2020-10-14 05:28:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 05:28:55,615 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-14 05:28:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 05:28:55,616 INFO L225 Difference]: With dead ends: 25 [2020-10-14 05:28:55,616 INFO L226 Difference]: Without dead ends: 0 [2020-10-14 05:28:55,616 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-14 05:28:55,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-14 05:28:55,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-14 05:28:55,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-14 05:28:55,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-14 05:28:55,618 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 24 [2020-10-14 05:28:55,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 05:28:55,618 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-14 05:28:55,618 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 05:28:55,619 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-14 05:28:55,619 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-14 05:28:55,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 05:28:55,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-10-14 05:28:57,781 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification. DAG size of input: 24 DAG size of output: 19 [2020-10-14 05:28:57,783 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-10-14 05:28:57,783 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:28:57,783 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-10-14 05:28:57,784 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-10-14 05:28:57,784 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-10-14 05:28:57,784 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-10-14 05:28:57,784 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 3 16) the Hoare annotation is: true [2020-10-14 05:28:57,784 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 3 16) no Hoare annotation was computed. [2020-10-14 05:28:57,784 INFO L268 CegarLoopResult]: For program point L14(line 14) no Hoare annotation was computed. [2020-10-14 05:28:57,784 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 3 16) no Hoare annotation was computed. [2020-10-14 05:28:57,785 INFO L268 CegarLoopResult]: For program point L7(lines 7 11) no Hoare annotation was computed. [2020-10-14 05:28:57,785 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 12) the Hoare annotation is: (or (<= main_~x~0 (+ (* 4294967296 (div (+ main_~x~0 (- 1)) 4294967296)) 10000000)) (<= (+ main_~x~0 (* 2 (div (+ (* main_~x~0 (- 1)) 10000003) 2))) 10000002)) [2020-10-14 05:28:57,785 INFO L264 CegarLoopResult]: At program point L6-2(lines 6 12) the Hoare annotation is: (<= (+ main_~x~0 (* 2 (div (+ (* main_~x~0 (- 1)) 10000003) 2))) 10000002) [2020-10-14 05:28:57,785 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-10-14 05:28:57,785 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-10-14 05:28:57,785 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-10-14 05:28:57,786 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-10-14 05:28:57,786 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-10-14 05:28:57,786 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-10-14 05:28:57,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.10 05:28:57 BoogieIcfgContainer [2020-10-14 05:28:57,820 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-14 05:28:57,823 INFO L168 Benchmark]: Toolchain (without parser) took 7123.84 ms. Allocated memory was 148.9 MB in the beginning and 272.1 MB in the end (delta: 123.2 MB). Free memory was 105.5 MB in the beginning and 144.0 MB in the end (delta: -38.5 MB). Peak memory consumption was 84.7 MB. Max. memory is 7.1 GB. [2020-10-14 05:28:57,824 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-14 05:28:57,829 INFO L168 Benchmark]: CACSL2BoogieTranslator took 231.67 ms. Allocated memory is still 148.9 MB. Free memory was 105.3 MB in the beginning and 95.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-10-14 05:28:57,830 INFO L168 Benchmark]: Boogie Preprocessor took 109.11 ms. Allocated memory was 148.9 MB in the beginning and 203.9 MB in the end (delta: 55.1 MB). Free memory was 95.9 MB in the beginning and 183.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-10-14 05:28:57,831 INFO L168 Benchmark]: RCFGBuilder took 243.28 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 171.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. [2020-10-14 05:28:57,831 INFO L168 Benchmark]: TraceAbstraction took 6532.51 ms. Allocated memory was 203.9 MB in the beginning and 272.1 MB in the end (delta: 68.2 MB). Free memory was 171.3 MB in the beginning and 144.0 MB in the end (delta: 27.2 MB). Peak memory consumption was 95.4 MB. Max. memory is 7.1 GB. [2020-10-14 05:28:57,839 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 148.9 MB. Free memory was 123.5 MB in the beginning and 123.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 231.67 ms. Allocated memory is still 148.9 MB. Free memory was 105.3 MB in the beginning and 95.9 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.11 ms. Allocated memory was 148.9 MB in the beginning and 203.9 MB in the end (delta: 55.1 MB). Free memory was 95.9 MB in the beginning and 183.1 MB in the end (delta: -87.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 243.28 ms. Allocated memory is still 203.9 MB. Free memory was 183.1 MB in the beginning and 171.3 MB in the end (delta: 11.8 MB). Peak memory consumption was 11.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 6532.51 ms. Allocated memory was 203.9 MB in the beginning and 272.1 MB in the end (delta: 68.2 MB). Free memory was 171.3 MB in the beginning and 144.0 MB in the end (delta: 27.2 MB). Peak memory consumption was 95.4 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: x <= 4294967296 * ((x + -1) / 4294967296) + 10000000 || x + 2 * ((x * -1 + 10000003) / 2) <= 10000002 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 19 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.2s, OverallIterations: 9, TraceHistogramMax: 7, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 2.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 6 SDslu, 149 SDs, 0 SdLazy, 132 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=25occurred in iteration=8, 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, 9 MinimizatonAttempts, 5 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 15 PreInvPairs, 24 NumberOfFragments, 43 HoareAnnotationTreeSize, 15 FomulaSimplifications, 237 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 10 FormulaSimplificationTreeSizeReductionInter, 2.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 146 NumberOfCodeBlocks, 146 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 8111 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 3 PerfectInterpolantSequences, 110/140 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...