/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.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=SHALLOWEST --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 language data_model -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:49:08,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:49:08,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:49:08,531 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:49:08,531 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:49:08,533 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:49:08,535 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:49:08,537 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:49:08,540 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:49:08,541 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:49:08,542 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:49:08,544 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:49:08,544 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:49:08,546 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:49:08,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:49:08,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:49:08,550 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:49:08,551 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:49:08,568 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:49:08,571 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:49:08,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:49:08,580 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:49:08,582 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:49:08,585 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:49:08,592 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:49:08,593 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:49:08,597 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:49:08,602 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:49:08,603 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:49:08,604 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:49:08,605 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:49:08,606 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:49:08,607 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:49:08,608 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:49:08,614 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:49:08,615 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:49:08,616 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:49:08,616 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:49:08,616 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:49:08,618 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:49:08,620 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:49:08,621 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 [2020-10-27 01:49:08,675 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:49:08,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:49:08,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:49:08,680 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:49:08,680 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:49:08,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:49:08,681 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:49:08,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:49:08,681 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:49:08,681 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:49:08,683 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:49:08,683 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:49:08,683 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:49:08,684 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:49:08,684 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:49:08,684 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:49:08,684 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:49:08,685 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:49:08,685 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:49:08,685 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:49:08,685 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:49:08,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:49:08,686 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:49:08,686 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:49:08,686 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:49:08,687 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:49:08,687 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:49:08,687 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:49:08,687 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:49:08,687 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:49:09,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:49:09,110 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:49:09,113 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:49:09,114 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:49:09,115 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:49:09,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c [2020-10-27 01:49:09,205 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33102c9da/8292d8b9bd7b45e88950bca53b1a9c80/FLAGd6c7fa4ef [2020-10-27 01:49:09,868 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:49:09,869 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_10.c [2020-10-27 01:49:09,876 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33102c9da/8292d8b9bd7b45e88950bca53b1a9c80/FLAGd6c7fa4ef [2020-10-27 01:49:10,272 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/33102c9da/8292d8b9bd7b45e88950bca53b1a9c80 [2020-10-27 01:49:10,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:49:10,286 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:49:10,290 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:49:10,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:49:10,294 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:49:10,295 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:49:10" (1/1) ... [2020-10-27 01:49:10,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@193924e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:49:10, skipping insertion in model container [2020-10-27 01:49:10,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:49:10" (1/1) ... [2020-10-27 01:49:10,310 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:49:10,327 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:49:10,507 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:49:10,522 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:49:10,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:49:10,553 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:49:10,554 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:49:10 WrapperNode [2020-10-27 01:49:10,554 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:49:10,555 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:49:10,556 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:49:10,556 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:49:10,568 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:49:10" (1/1) ... [2020-10-27 01:49:10,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:49:10" (1/1) ... [2020-10-27 01:49:10,576 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:49:10" (1/1) ... [2020-10-27 01:49:10,577 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:49:10" (1/1) ... [2020-10-27 01:49:10,582 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:49:10" (1/1) ... [2020-10-27 01:49:10,587 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:49:10" (1/1) ... [2020-10-27 01:49:10,588 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:49:10" (1/1) ... [2020-10-27 01:49:10,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:49:10,591 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:49:10,592 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:49:10,592 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:49:10,593 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:49:10" (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 [2020-10-27 01:49:10,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:49:10,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:49:10,665 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:49:10,665 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 01:49:10,665 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:49:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:49:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:49:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:49:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:49:10,666 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:49:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:49:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:49:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:49:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:49:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:49:10,667 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:49:10,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:49:10,918 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:49:10,919 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 01:49:10,921 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:49:10 BoogieIcfgContainer [2020-10-27 01:49:10,921 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:49:10,924 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:49:10,924 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:49:10,929 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:49:10,929 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:49:10" (1/3) ... [2020-10-27 01:49:10,930 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a58c645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:49:10, skipping insertion in model container [2020-10-27 01:49:10,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:49:10" (2/3) ... [2020-10-27 01:49:10,931 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a58c645 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:49:10, skipping insertion in model container [2020-10-27 01:49:10,931 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:49:10" (3/3) ... [2020-10-27 01:49:10,934 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_10.c [2020-10-27 01:49:10,949 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:49:10,956 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:49:10,973 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:49:11,025 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:49:11,026 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:49:11,026 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:49:11,026 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:49:11,026 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:49:11,027 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:49:11,027 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:49:11,027 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:49:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-10-27 01:49:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:49:11,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:11,055 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:11,056 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:11,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:11,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1507135652, now seen corresponding path program 1 times [2020-10-27 01:49:11,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:11,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261010956] [2020-10-27 01:49:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:11,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:11,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:11,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:11,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:49:11,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:11,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-27 01:49:11,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:11,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:11,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 01:49:11,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:11,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:49:11,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:11,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:11,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:11,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:11,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:11,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:11,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 01:49:11,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:11,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:11,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:11,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:11,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:49:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:11,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261010956] [2020-10-27 01:49:11,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:49:11,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 01:49:11,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889520342] [2020-10-27 01:49:11,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-27 01:49:11,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:11,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-27 01:49:11,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:49:11,592 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-10-27 01:49:11,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:11,728 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2020-10-27 01:49:11,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-27 01:49:11,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-27 01:49:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:11,744 INFO L225 Difference]: With dead ends: 38 [2020-10-27 01:49:11,744 INFO L226 Difference]: Without dead ends: 15 [2020-10-27 01:49:11,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-27 01:49:11,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-10-27 01:49:11,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-10-27 01:49:11,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-10-27 01:49:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2020-10-27 01:49:11,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 12 [2020-10-27 01:49:11,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:11,809 INFO L481 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2020-10-27 01:49:11,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-27 01:49:11,809 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2020-10-27 01:49:11,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-27 01:49:11,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:11,811 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:11,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:49:11,812 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:11,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:11,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1192214991, now seen corresponding path program 1 times [2020-10-27 01:49:11,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:11,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375818903] [2020-10-27 01:49:11,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:11,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:12,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:12,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 01:49:12,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:12,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-27 01:49:12,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:12,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:49:12,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:12,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:49:12,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:49:12,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:12,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:12,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:12,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:12,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:12,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 01:49:12,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:12,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:12,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:12,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:12,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:49:12,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:12,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375818903] [2020-10-27 01:49:12,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:49:12,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:49:12,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884122186] [2020-10-27 01:49:12,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:49:12,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:12,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:49:12,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:49:12,227 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand 4 states. [2020-10-27 01:49:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:12,331 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-10-27 01:49:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:49:12,331 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-10-27 01:49:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:12,332 INFO L225 Difference]: With dead ends: 24 [2020-10-27 01:49:12,333 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:49:12,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:49:12,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:49:12,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-10-27 01:49:12,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-27 01:49:12,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2020-10-27 01:49:12,343 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 12 [2020-10-27 01:49:12,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:12,344 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2020-10-27 01:49:12,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:49:12,344 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2020-10-27 01:49:12,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:49:12,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:12,345 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:12,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:49:12,345 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:12,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:12,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1953512822, now seen corresponding path program 1 times [2020-10-27 01:49:12,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:12,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [857489806] [2020-10-27 01:49:12,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:12,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:12,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:12,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:12,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:49:12,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:12,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 309 [2020-10-27 01:49:12,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:12,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:49:12,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:12,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:49:12,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:49:12,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:12,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:12,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:12,785 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:12,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:12,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:12,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:49:12,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:12,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:12,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:12,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:12,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:12,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:12,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [857489806] [2020-10-27 01:49:12,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:49:12,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:49:12,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391676213] [2020-10-27 01:49:12,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:49:12,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:12,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:49:12,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:49:12,803 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand 4 states. [2020-10-27 01:49:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:12,910 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-10-27 01:49:12,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:49:12,913 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 01:49:12,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:12,914 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:49:12,914 INFO L226 Difference]: Without dead ends: 18 [2020-10-27 01:49:12,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:49:12,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-10-27 01:49:12,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-10-27 01:49:12,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-27 01:49:12,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-10-27 01:49:12,928 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-10-27 01:49:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:12,929 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-10-27 01:49:12,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:49:12,929 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-10-27 01:49:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 01:49:12,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:12,930 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:12,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:49:12,930 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:12,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:12,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1532107848, now seen corresponding path program 1 times [2020-10-27 01:49:12,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:12,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1179897806] [2020-10-27 01:49:12,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:12,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:12,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:13,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:49:13,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:13,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-27 01:49:13,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:49:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:13,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-27 01:49:13,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:13,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:13,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:13,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:13,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:13,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:49:13,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:13,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:13,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:13,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:13,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:13,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:13,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1179897806] [2020-10-27 01:49:13,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:13,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:49:13,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543959449] [2020-10-27 01:49:13,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:49:13,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:13,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:49:13,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:49:13,230 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-10-27 01:49:13,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:13,376 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2020-10-27 01:49:13,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:49:13,377 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-10-27 01:49:13,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:13,377 INFO L225 Difference]: With dead ends: 27 [2020-10-27 01:49:13,377 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:49:13,378 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:49:13,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:49:13,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 19. [2020-10-27 01:49:13,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-27 01:49:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2020-10-27 01:49:13,385 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 15 [2020-10-27 01:49:13,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:13,385 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2020-10-27 01:49:13,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:49:13,385 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2020-10-27 01:49:13,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:49:13,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:13,386 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:13,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:49:13,387 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:13,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:13,387 INFO L82 PathProgramCache]: Analyzing trace with hash 556673393, now seen corresponding path program 1 times [2020-10-27 01:49:13,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:13,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809307493] [2020-10-27 01:49:13,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:13,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:13,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:49:13,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:13,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-27 01:49:13,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:13,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:49:13,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:13,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:49:13,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 01:49:13,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:13,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:13,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:13,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:13,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:13,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 01:49:13,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:13,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:13,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:13,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:13,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:13,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:13,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809307493] [2020-10-27 01:49:13,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:13,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:49:13,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143965457] [2020-10-27 01:49:13,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:49:13,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:13,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:49:13,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:49:13,693 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand 5 states. [2020-10-27 01:49:13,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:13,831 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2020-10-27 01:49:13,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:49:13,831 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-27 01:49:13,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:13,832 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:49:13,832 INFO L226 Difference]: Without dead ends: 21 [2020-10-27 01:49:13,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:49:13,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-27 01:49:13,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2020-10-27 01:49:13,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:49:13,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-10-27 01:49:13,843 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 18 [2020-10-27 01:49:13,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:13,844 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-10-27 01:49:13,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:49:13,844 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-10-27 01:49:13,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-27 01:49:13,845 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:13,845 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:13,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:49:13,845 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:13,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:13,846 INFO L82 PathProgramCache]: Analyzing trace with hash -252673233, now seen corresponding path program 2 times [2020-10-27 01:49:13,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:13,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511940116] [2020-10-27 01:49:13,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:13,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:13,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:13,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:14,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:14,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 01:49:14,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:49:14,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 196 [2020-10-27 01:49:14,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:14,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:49:14,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:14,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 01:49:14,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:14,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:14,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:14,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:14,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:14,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:14,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:14,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:49:14,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:14,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:14,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:14,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511940116] [2020-10-27 01:49:14,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:14,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:49:14,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506046931] [2020-10-27 01:49:14,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:49:14,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:14,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:49:14,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:49:14,227 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 6 states. [2020-10-27 01:49:14,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:14,429 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-10-27 01:49:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:49:14,430 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-10-27 01:49:14,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:14,430 INFO L225 Difference]: With dead ends: 30 [2020-10-27 01:49:14,431 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:49:14,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:49:14,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:49:14,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2020-10-27 01:49:14,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-10-27 01:49:14,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-10-27 01:49:14,437 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 18 [2020-10-27 01:49:14,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:14,438 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-10-27 01:49:14,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:49:14,438 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-10-27 01:49:14,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:49:14,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:14,439 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:14,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:49:14,439 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:14,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:14,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1838613802, now seen corresponding path program 2 times [2020-10-27 01:49:14,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:14,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407116047] [2020-10-27 01:49:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:14,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:14,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:14,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:14,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:14,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:14,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:49:14,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:49:14,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 534 [2020-10-27 01:49:14,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:14,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:49:14,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:14,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 01:49:14,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:15,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:15,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:15,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:15,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:15,290 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:15,290 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:15,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:49:15,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:15,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:15,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:15,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:15,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:15,298 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:49:15,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407116047] [2020-10-27 01:49:15,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:15,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:49:15,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079665587] [2020-10-27 01:49:15,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:49:15,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:15,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:49:15,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:49:15,303 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 10 states. [2020-10-27 01:49:17,736 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-10-27 01:49:18,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:18,291 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-10-27 01:49:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:49:18,291 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 21 [2020-10-27 01:49:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:18,294 INFO L225 Difference]: With dead ends: 36 [2020-10-27 01:49:18,294 INFO L226 Difference]: Without dead ends: 30 [2020-10-27 01:49:18,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:49:18,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-27 01:49:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-27 01:49:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-27 01:49:18,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-27 01:49:18,303 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-10-27 01:49:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:18,303 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-27 01:49:18,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:49:18,304 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-27 01:49:18,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:49:18,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:18,304 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:18,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:49:18,305 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:18,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:18,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1029267176, now seen corresponding path program 3 times [2020-10-27 01:49:18,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:18,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359564204] [2020-10-27 01:49:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:18,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:18,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:18,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:18,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:18,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:18,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 01:49:18,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:49:18,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 01:49:18,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:18,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:49:18,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:18,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 01:49:18,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:18,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:18,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:18,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:18,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:18,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:18,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:18,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:49:18,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:18,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:18,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:18,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:18,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:18,704 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:18,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359564204] [2020-10-27 01:49:18,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:18,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:49:18,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702202215] [2020-10-27 01:49:18,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:49:18,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:18,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:49:18,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:49:18,709 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-10-27 01:49:19,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:19,056 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2020-10-27 01:49:19,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:49:19,057 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-10-27 01:49:19,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:19,058 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:49:19,058 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:49:19,059 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:49:19,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:49:19,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2020-10-27 01:49:19,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:49:19,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-27 01:49:19,068 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 21 [2020-10-27 01:49:19,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:19,069 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-27 01:49:19,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:49:19,069 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-27 01:49:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:49:19,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:19,070 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:19,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:49:19,070 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:19,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:19,071 INFO L82 PathProgramCache]: Analyzing trace with hash 575077711, now seen corresponding path program 3 times [2020-10-27 01:49:19,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:19,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348110384] [2020-10-27 01:49:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:19,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:19,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:19,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:19,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:19,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:19,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:20,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:20,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:49:20,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:49:20,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 942 [2020-10-27 01:49:20,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:20,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:49:20,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:20,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:49:20,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:20,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:20,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:20,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:20,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:20,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:20,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:20,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:49:20,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:20,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:49:20,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348110384] [2020-10-27 01:49:20,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:20,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:49:20,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151221785] [2020-10-27 01:49:20,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:49:20,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:20,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:49:20,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:49:20,539 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 12 states. [2020-10-27 01:49:23,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:23,488 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-10-27 01:49:23,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:49:23,488 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-27 01:49:23,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:23,489 INFO L225 Difference]: With dead ends: 48 [2020-10-27 01:49:23,490 INFO L226 Difference]: Without dead ends: 36 [2020-10-27 01:49:23,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:49:23,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-27 01:49:23,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 33. [2020-10-27 01:49:23,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-27 01:49:23,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-27 01:49:23,499 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-10-27 01:49:23,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:23,499 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-27 01:49:23,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:49:23,499 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-27 01:49:23,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 01:49:23,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:23,500 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:23,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:49:23,501 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:23,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:23,501 INFO L82 PathProgramCache]: Analyzing trace with hash 466795663, now seen corresponding path program 4 times [2020-10-27 01:49:23,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:23,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633519899] [2020-10-27 01:49:23,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:23,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:23,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:23,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:23,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:24,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:24,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:49:24,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:49:24,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 529 [2020-10-27 01:49:24,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:24,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:49:24,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:24,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:49:24,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:24,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:24,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:24,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:24,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:24,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:24,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:49:24,206 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:24,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:24,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:24,211 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-27 01:49:24,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633519899] [2020-10-27 01:49:24,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:24,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:49:24,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364124566] [2020-10-27 01:49:24,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:49:24,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:24,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:49:24,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:49:24,214 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2020-10-27 01:49:24,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:24,438 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2020-10-27 01:49:24,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:49:24,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-10-27 01:49:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:24,441 INFO L225 Difference]: With dead ends: 43 [2020-10-27 01:49:24,441 INFO L226 Difference]: Without dead ends: 37 [2020-10-27 01:49:24,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:49:24,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-27 01:49:24,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 28. [2020-10-27 01:49:24,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-27 01:49:24,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-10-27 01:49:24,457 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2020-10-27 01:49:24,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:24,457 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-10-27 01:49:24,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:49:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-10-27 01:49:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:49:24,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:24,460 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:24,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:49:24,461 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:24,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:24,461 INFO L82 PathProgramCache]: Analyzing trace with hash -335227126, now seen corresponding path program 4 times [2020-10-27 01:49:24,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:24,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952128574] [2020-10-27 01:49:24,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:24,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:24,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:24,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:24,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:24,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:24,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:25,562 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:25,562 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:49:25,562 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:49:25,562 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1081 [2020-10-27 01:49:25,562 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:25,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:49:25,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:25,563 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 01:49:25,563 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:25,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:25,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:25,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:25,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:25,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:25,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:25,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:25,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:25,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:25,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:25,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:25,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:25,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952128574] [2020-10-27 01:49:25,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:25,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:49:25,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219062747] [2020-10-27 01:49:25,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:49:25,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:25,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:49:25,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:49:25,712 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand 8 states. [2020-10-27 01:49:26,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:26,073 INFO L93 Difference]: Finished difference Result 52 states and 58 transitions. [2020-10-27 01:49:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:49:26,076 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-27 01:49:26,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:26,077 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:49:26,077 INFO L226 Difference]: Without dead ends: 38 [2020-10-27 01:49:26,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:49:26,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-27 01:49:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-10-27 01:49:26,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-27 01:49:26,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-10-27 01:49:26,088 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 27 [2020-10-27 01:49:26,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:26,089 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-10-27 01:49:26,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:49:26,089 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-10-27 01:49:26,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 01:49:26,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:26,090 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:26,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:49:26,091 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:26,091 INFO L82 PathProgramCache]: Analyzing trace with hash -152288047, now seen corresponding path program 5 times [2020-10-27 01:49:26,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:26,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149537589] [2020-10-27 01:49:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:26,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:26,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:26,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:26,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:26,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:27,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:27,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:27,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:27,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:31,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:31,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:49:31,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:49:31,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:49:31,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:31,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:49:31,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:31,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 01:49:31,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:49:31,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:31,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:31,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:31,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:31,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:31,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:49:31,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:31,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:31,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:31,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:31,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 15 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:49:31,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149537589] [2020-10-27 01:49:31,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:31,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:49:31,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764894964] [2020-10-27 01:49:31,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:49:31,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:31,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:49:31,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:49:31,307 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand 11 states. [2020-10-27 01:49:31,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:31,924 INFO L93 Difference]: Finished difference Result 61 states and 67 transitions. [2020-10-27 01:49:31,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:49:31,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 36 [2020-10-27 01:49:31,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:31,926 INFO L225 Difference]: With dead ends: 61 [2020-10-27 01:49:31,926 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 01:49:31,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:49:31,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 01:49:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2020-10-27 01:49:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-27 01:49:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2020-10-27 01:49:31,944 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 36 [2020-10-27 01:49:31,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:31,946 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2020-10-27 01:49:31,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:49:31,947 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2020-10-27 01:49:31,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:49:31,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:31,951 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:31,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:49:31,951 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:31,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:31,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1780901610, now seen corresponding path program 6 times [2020-10-27 01:49:31,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:31,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510843719] [2020-10-27 01:49:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:31,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:32,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:32,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:32,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:32,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:32,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:32,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:33,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:33,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:33,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:33,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:36,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:36,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:49:36,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:49:36,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:49:36,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:36,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:49:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:36,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:49:36,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:37,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:37,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:37,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:37,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:37,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:37,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:37,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:49:37,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:37,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:37,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:37,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:37,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 48 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:49:37,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510843719] [2020-10-27 01:49:37,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:37,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:49:37,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983210583] [2020-10-27 01:49:37,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:49:37,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:37,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:49:37,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:49:37,255 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand 13 states. [2020-10-27 01:49:38,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:49:38,094 INFO L93 Difference]: Finished difference Result 67 states and 72 transitions. [2020-10-27 01:49:38,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:49:38,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-27 01:49:38,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:49:38,095 INFO L225 Difference]: With dead ends: 67 [2020-10-27 01:49:38,095 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 01:49:38,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:49:38,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 01:49:38,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2020-10-27 01:49:38,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 01:49:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2020-10-27 01:49:38,118 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 45 [2020-10-27 01:49:38,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:49:38,118 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2020-10-27 01:49:38,118 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:49:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2020-10-27 01:49:38,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-27 01:49:38,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:49:38,120 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:49:38,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:49:38,120 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:49:38,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:49:38,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1527468426, now seen corresponding path program 7 times [2020-10-27 01:49:38,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:49:38,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480496372] [2020-10-27 01:49:38,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:49:38,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:38,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:38,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:38,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:38,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:38,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:39,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:43,158 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:43,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:49:43,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 01:49:43,159 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 01:49:43,159 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:43,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:49:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:49:43,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:49:43,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 01:49:44,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:49:44,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:49:44,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:49:44,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:49:44,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:49:44,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:49:44,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:49:44,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:49:44,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:49:44,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:49:44,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:49:44,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:49:44,097 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:49:44,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480496372] [2020-10-27 01:49:44,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:49:44,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:49:44,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162473835] [2020-10-27 01:49:44,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:49:44,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:49:44,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:49:44,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:49:44,101 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand 16 states. [2020-10-27 01:49:45,594 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-27 01:49:46,047 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 55 [2020-10-27 01:49:46,375 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 53 [2020-10-27 01:49:47,311 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-10-27 01:49:47,869 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 53 [2020-10-27 01:49:51,057 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 79 DAG size of output: 55 [2020-10-27 01:49:55,242 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2020-10-27 01:50:06,034 WARN L193 SmtUtils]: Spent 9.15 s on a formula simplification. DAG size of input: 87 DAG size of output: 55 [2020-10-27 01:50:14,565 WARN L193 SmtUtils]: Spent 5.34 s on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-27 01:50:17,674 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 55 [2020-10-27 01:50:21,729 WARN L193 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 101 DAG size of output: 53 [2020-10-27 01:50:24,951 WARN L193 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 55 [2020-10-27 01:50:31,520 WARN L193 SmtUtils]: Spent 3.16 s on a formula simplification. DAG size of input: 109 DAG size of output: 53 [2020-10-27 01:50:43,114 WARN L193 SmtUtils]: Spent 8.95 s on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2020-10-27 01:50:46,569 WARN L193 SmtUtils]: Spent 1.72 s on a formula simplification. DAG size of input: 117 DAG size of output: 53 [2020-10-27 01:50:48,587 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= (+ c_main_~x~0 4999999) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 2)) 4294967296)))) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 5000000) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 1)) 4294967296)))) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2020-10-27 01:50:51,671 WARN L193 SmtUtils]: Spent 2.82 s on a formula simplification. DAG size of input: 89 DAG size of output: 25 [2020-10-27 01:51:01,721 WARN L193 SmtUtils]: Spent 9.42 s on a formula simplification. DAG size of input: 125 DAG size of output: 61 [2020-10-27 01:51:05,423 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 25 [2020-10-27 01:51:13,466 WARN L193 SmtUtils]: Spent 3.31 s on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2020-10-27 01:51:15,507 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296)))) (= |c_#NULL.offset| |c_old(#NULL.offset)|)) is different from false [2020-10-27 01:51:17,515 WARN L838 $PredicateComparison]: unable to prove that (and (<= (+ c_main_~x~0 4999993) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 8)) 4294967296)))) (<= (+ c_main_~x~0 4999995) (+ (* 4294967296 (div (+ c_main_~x~0 (- 6)) 4294967296)) c_main_~y~0)) (<= (+ c_main_~x~0 4999992) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 9)) 4294967296)))) (<= (+ c_main_~x~0 4999994) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 7)) 4294967296)))) (<= (+ c_main_~x~0 4999996) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 5)) 4294967296)))) (<= (+ c_main_~x~0 4999998) (+ (* 4294967296 (div (+ c_main_~x~0 (- 3)) 4294967296)) c_main_~y~0)) (<= (div c_main_~y~0 4294967296) 0) (<= (+ c_main_~x~0 4999991) (+ (* 4294967296 (div (+ c_main_~x~0 (- 10)) 4294967296)) c_main_~y~0)) (<= 10000000 c_main_~y~0) (<= (+ c_main_~x~0 4999997) (+ c_main_~y~0 (* 4294967296 (div (+ c_main_~x~0 (- 4)) 4294967296))))) is different from false [2020-10-27 01:51:22,143 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 23 [2020-10-27 01:51:27,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:51:27,856 INFO L93 Difference]: Finished difference Result 92 states and 106 transitions. [2020-10-27 01:51:27,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:51:27,857 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 51 [2020-10-27 01:51:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:51:27,858 INFO L225 Difference]: With dead ends: 92 [2020-10-27 01:51:27,858 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 01:51:27,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 92.1s TimeCoverageRelationStatistics Valid=515, Invalid=1383, Unknown=6, NotChecked=258, Total=2162 [2020-10-27 01:51:27,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 01:51:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2020-10-27 01:51:27,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:51:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2020-10-27 01:51:27,876 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 51 [2020-10-27 01:51:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:51:27,877 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2020-10-27 01:51:27,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:51:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2020-10-27 01:51:27,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:51:27,878 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:51:27,878 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:51:27,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:51:27,879 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:51:27,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:51:27,879 INFO L82 PathProgramCache]: Analyzing trace with hash 776797967, now seen corresponding path program 8 times [2020-10-27 01:51:27,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:51:27,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901628821] [2020-10-27 01:51:27,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:51:27,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:27,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:27,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:28,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:28,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:28,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:28,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:28,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:28,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:28,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:28,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:32,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:32,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:51:32,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 01:51:32,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:51:32,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:32,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:51:32,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:51:32,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:51:32,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:33,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:51:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:51:33,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:51:33,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:51:33,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:51:33,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:51:33,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:51:33,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:51:33,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:51:33,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:51:33,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:51:33,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:51:34,020 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 0 proven. 369 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:51:34,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901628821] [2020-10-27 01:51:34,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:51:34,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:51:34,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552659309] [2020-10-27 01:51:34,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:51:34,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:51:34,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:51:34,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:51:34,023 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand 19 states. [2020-10-27 01:51:36,975 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-27 01:51:39,259 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 55 [2020-10-27 01:51:41,747 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-27 01:51:44,125 WARN L193 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-27 01:51:45,426 WARN L193 SmtUtils]: Spent 640.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-27 01:51:45,746 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 55 [2020-10-27 01:51:50,734 WARN L193 SmtUtils]: Spent 4.79 s on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-27 01:51:53,103 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-27 01:51:57,617 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 54 [2020-10-27 01:52:05,880 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2020-10-27 01:52:12,613 WARN L193 SmtUtils]: Spent 3.90 s on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2020-10-27 01:52:20,949 WARN L193 SmtUtils]: Spent 8.15 s on a formula simplification. DAG size of input: 97 DAG size of output: 55 [2020-10-27 01:52:25,090 WARN L193 SmtUtils]: Spent 3.83 s on a formula simplification. DAG size of input: 103 DAG size of output: 54 [2020-10-27 01:52:32,376 WARN L193 SmtUtils]: Spent 4.87 s on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2020-10-27 01:52:40,709 WARN L193 SmtUtils]: Spent 8.12 s on a formula simplification. DAG size of input: 110 DAG size of output: 54 [2020-10-27 01:52:51,686 WARN L193 SmtUtils]: Spent 7.92 s on a formula simplification. DAG size of input: 111 DAG size of output: 55 [2020-10-27 01:53:09,838 WARN L193 SmtUtils]: Spent 13.38 s on a formula simplification. DAG size of input: 132 DAG size of output: 55 [2020-10-27 01:53:11,854 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 (- 1)))) (and (= |c_#t~string5.offset| |c_old(#t~string5.offset)|) (<= 3 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999998)) 4294967296)) c_main_~x~0)) (<= 9 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999992)) 4294967296)))) (<= 1 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 5000000)) 4294967296)))) (= |c_old(#length)| |c_#length|) (= |c_#t~string6.base| |c_old(#t~string6.base)|) (<= 8 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999993)) 4294967296)) c_main_~x~0)) (= |c_#t~string6.offset| |c_old(#t~string6.offset)|) (<= 10000000 c_main_~y~0) (<= 5 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999996)) 4294967296)))) (= |c_#t~string4.offset| |c_old(#t~string4.offset)|) (= |c_old(#valid)| |c_#valid|) (<= 4 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999997)) 4294967296)))) (= |c_#t~string5.base| |c_old(#t~string5.base)|) (<= (div c_main_~y~0 4294967296) 0) (= |c_#t~string4.base| |c_old(#t~string4.base)|) (<= 6 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999995)) 4294967296)))) (= |c_#NULL.base| |c_old(#NULL.base)|) (<= 2 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999999)) 4294967296)))) (<= 10 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999991)) 4294967296)))) (<= 7 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999994)) 4294967296)) c_main_~x~0)) (= |c_#NULL.offset| |c_old(#NULL.offset)|) (<= (+ c_main_~x~0 5000001) (+ c_main_~y~0 (* 4294967296 (div c_main_~x~0 4294967296)))))) is different from false [2020-10-27 01:53:25,093 WARN L193 SmtUtils]: Spent 7.67 s on a formula simplification. DAG size of input: 125 DAG size of output: 55 [2020-10-27 01:53:27,119 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (* c_main_~x~0 (- 1)))) (and (<= 3 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999998)) 4294967296)) c_main_~x~0)) (<= 9 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999992)) 4294967296)))) (<= 1 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 5000000)) 4294967296)))) (<= 8 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999993)) 4294967296)) c_main_~x~0)) (<= 10000000 c_main_~y~0) (<= 5 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999996)) 4294967296)))) (<= 4 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999997)) 4294967296)))) (<= 11 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999990)) 4294967296)))) (<= (div c_main_~y~0 4294967296) 0) (<= 6 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999995)) 4294967296)))) (<= 2 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999999)) 4294967296)))) (<= 10 (+ c_main_~x~0 (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999991)) 4294967296)))) (<= 7 (+ (* 4294967296 (div (+ .cse0 c_main_~y~0 (- 4999994)) 4294967296)) c_main_~x~0)))) is different from false