/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/systemc/mem_slave_tlm.5.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 06:31:49,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 06:31:49,822 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 06:31:49,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 06:31:49,885 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 06:31:49,893 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 06:31:49,895 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 06:31:49,900 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 06:31:49,904 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 06:31:49,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 06:31:49,912 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 06:31:49,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 06:31:49,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 06:31:49,919 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 06:31:49,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 06:31:49,924 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 06:31:49,939 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 06:31:49,943 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 06:31:49,950 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 06:31:49,959 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 06:31:49,960 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 06:31:49,962 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 06:31:49,964 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 06:31:49,967 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 06:31:49,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 06:31:49,976 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 06:31:49,976 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 06:31:49,979 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 06:31:49,979 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 06:31:49,980 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 06:31:49,981 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 06:31:49,982 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 06:31:49,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 06:31:49,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 06:31:49,987 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 06:31:49,987 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 06:31:49,988 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 06:31:49,988 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 06:31:49,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 06:31:49,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 06:31:49,991 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 06:31:49,992 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 06:31:50,020 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 06:31:50,020 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 06:31:50,022 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 06:31:50,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 06:31:50,022 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 06:31:50,023 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 06:31:50,023 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 06:31:50,023 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 06:31:50,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 06:31:50,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 06:31:50,024 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 06:31:50,024 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 06:31:50,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 06:31:50,024 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 06:31:50,025 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 06:31:50,025 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 06:31:50,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 06:31:50,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 06:31:50,026 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 06:31:50,026 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 06:31:50,026 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 06:31:50,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 06:31:50,027 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 06:31:50,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 06:31:50,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 06:31:50,027 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 06:31:50,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 06:31:50,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 06:31:50,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 06:31:50,028 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 06:31:50,455 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 06:31:50,492 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 06:31:50,495 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 06:31:50,497 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 06:31:50,498 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 06:31:50,499 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/mem_slave_tlm.5.cil.c [2020-10-27 06:31:50,597 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1516556f7/d563651fb1534f36819c9ba0dd688119/FLAG852531b3c [2020-10-27 06:31:51,291 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 06:31:51,292 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/mem_slave_tlm.5.cil.c [2020-10-27 06:31:51,309 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1516556f7/d563651fb1534f36819c9ba0dd688119/FLAG852531b3c [2020-10-27 06:31:51,608 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1516556f7/d563651fb1534f36819c9ba0dd688119 [2020-10-27 06:31:51,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 06:31:51,619 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 06:31:51,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 06:31:51,624 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 06:31:51,632 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 06:31:51,634 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:31:51" (1/1) ... [2020-10-27 06:31:51,638 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c8f5d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:51, skipping insertion in model container [2020-10-27 06:31:51,638 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:31:51" (1/1) ... [2020-10-27 06:31:51,647 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 06:31:51,714 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 06:31:51,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:31:52,003 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 06:31:52,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 06:31:52,174 INFO L208 MainTranslator]: Completed translation [2020-10-27 06:31:52,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:52 WrapperNode [2020-10-27 06:31:52,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 06:31:52,176 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 06:31:52,177 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 06:31:52,177 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 06:31:52,191 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:52" (1/1) ... [2020-10-27 06:31:52,191 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:52" (1/1) ... [2020-10-27 06:31:52,205 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:52" (1/1) ... [2020-10-27 06:31:52,205 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:52" (1/1) ... [2020-10-27 06:31:52,227 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:52" (1/1) ... [2020-10-27 06:31:52,304 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:52" (1/1) ... [2020-10-27 06:31:52,322 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:52" (1/1) ... [2020-10-27 06:31:52,337 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 06:31:52,338 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 06:31:52,338 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 06:31:52,338 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 06:31:52,341 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:52" (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 06:31:52,435 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 06:31:52,436 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 06:31:52,436 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 06:31:52,436 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-10-27 06:31:52,436 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_read [2020-10-27 06:31:52,436 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_write [2020-10-27 06:31:52,436 INFO L138 BoogieDeclarations]: Found implementation of procedure m_run [2020-10-27 06:31:52,437 INFO L138 BoogieDeclarations]: Found implementation of procedure s_run [2020-10-27 06:31:52,437 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-10-27 06:31:52,437 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-10-27 06:31:52,437 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 06:31:52,437 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 06:31:52,437 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 06:31:52,438 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 06:31:52,438 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 06:31:52,438 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 06:31:52,438 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-10-27 06:31:52,438 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_read [2020-10-27 06:31:52,438 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_write [2020-10-27 06:31:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure m_run [2020-10-27 06:31:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure s_run [2020-10-27 06:31:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-10-27 06:31:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-10-27 06:31:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 06:31:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 06:31:52,439 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 06:31:52,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 06:31:52,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 06:31:52,440 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 06:31:52,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 06:31:53,687 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 06:31:53,688 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-27 06:31:53,691 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:31:53 BoogieIcfgContainer [2020-10-27 06:31:53,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 06:31:53,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 06:31:53,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 06:31:53,698 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 06:31:53,698 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:31:51" (1/3) ... [2020-10-27 06:31:53,699 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726ea4d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:31:53, skipping insertion in model container [2020-10-27 06:31:53,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:31:52" (2/3) ... [2020-10-27 06:31:53,700 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@726ea4d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:31:53, skipping insertion in model container [2020-10-27 06:31:53,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:31:53" (3/3) ... [2020-10-27 06:31:53,702 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.5.cil.c [2020-10-27 06:31:53,716 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 06:31:53,756 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 06:31:53,771 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 06:31:53,801 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 06:31:53,801 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 06:31:53,801 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 06:31:53,801 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 06:31:53,802 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 06:31:53,802 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 06:31:53,802 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 06:31:53,802 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 06:31:53,830 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states. [2020-10-27 06:31:53,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 06:31:53,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:31:53,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:31:53,845 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:31:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:31:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash -635908971, now seen corresponding path program 1 times [2020-10-27 06:31:53,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:31:53,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852670441] [2020-10-27 06:31:53,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:31:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:54,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:54,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:54,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:55,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:55,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:55,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:56,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:56,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:56,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:57,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:57,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:58,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:58,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:59,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:59,141 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 06:31:59,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 06:31:59,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-27 06:31:59,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:59,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:31:59,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:31:59,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 06:31:59,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 06:31:59,518 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:31:59,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:31:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:31:59,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:31:59,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:31:59,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:31:59,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:31:59,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 06:31:59,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:31:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:31:59,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:31:59,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:31:59,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:31:59,589 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 06:31:59,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852670441] [2020-10-27 06:31:59,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:31:59,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:31:59,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897358981] [2020-10-27 06:31:59,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:31:59,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:31:59,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:31:59,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:31:59,626 INFO L87 Difference]: Start difference. First operand 310 states. Second operand 4 states. [2020-10-27 06:31:59,948 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:32:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:02,550 INFO L93 Difference]: Finished difference Result 897 states and 1599 transitions. [2020-10-27 06:32:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:32:02,555 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-27 06:32:02,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:02,592 INFO L225 Difference]: With dead ends: 897 [2020-10-27 06:32:02,592 INFO L226 Difference]: Without dead ends: 584 [2020-10-27 06:32:02,610 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:32:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-10-27 06:32:02,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 509. [2020-10-27 06:32:02,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2020-10-27 06:32:02,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 789 transitions. [2020-10-27 06:32:02,765 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 789 transitions. Word has length 40 [2020-10-27 06:32:02,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:02,766 INFO L481 AbstractCegarLoop]: Abstraction has 509 states and 789 transitions. [2020-10-27 06:32:02,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:32:02,766 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 789 transitions. [2020-10-27 06:32:02,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-27 06:32:02,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:02,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:32:02,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 06:32:02,773 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:02,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:02,774 INFO L82 PathProgramCache]: Analyzing trace with hash 170099848, now seen corresponding path program 1 times [2020-10-27 06:32:02,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:02,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019756306] [2020-10-27 06:32:02,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:02,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:02,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:02,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:02,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:03,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:07,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:07,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 06:32:07,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 06:32:07,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 06:32:07,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:07,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 06:32:07,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:32:07,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 06:32:07,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:32:08,191 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:32:08,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:08,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:08,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:08,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:08,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:08,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 06:32:08,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:08,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:32:08,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:08,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:32:08,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:08,261 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 06:32:08,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019756306] [2020-10-27 06:32:08,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:08,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 06:32:08,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689122683] [2020-10-27 06:32:08,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 06:32:08,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:08,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 06:32:08,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:32:08,271 INFO L87 Difference]: Start difference. First operand 509 states and 789 transitions. Second operand 7 states. [2020-10-27 06:32:08,495 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:32:09,379 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 06:32:09,614 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 06:32:11,263 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:32:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:11,478 INFO L93 Difference]: Finished difference Result 1509 states and 2329 transitions. [2020-10-27 06:32:11,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 06:32:11,479 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2020-10-27 06:32:11,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:11,488 INFO L225 Difference]: With dead ends: 1509 [2020-10-27 06:32:11,488 INFO L226 Difference]: Without dead ends: 1020 [2020-10-27 06:32:11,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-27 06:32:11,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2020-10-27 06:32:11,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 873. [2020-10-27 06:32:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 873 states. [2020-10-27 06:32:11,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 873 states to 873 states and 1368 transitions. [2020-10-27 06:32:11,601 INFO L78 Accepts]: Start accepts. Automaton has 873 states and 1368 transitions. Word has length 54 [2020-10-27 06:32:11,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:11,601 INFO L481 AbstractCegarLoop]: Abstraction has 873 states and 1368 transitions. [2020-10-27 06:32:11,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 06:32:11,602 INFO L276 IsEmpty]: Start isEmpty. Operand 873 states and 1368 transitions. [2020-10-27 06:32:11,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 06:32:11,604 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:11,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:32:11,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 06:32:11,605 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:11,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:11,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1836964758, now seen corresponding path program 1 times [2020-10-27 06:32:11,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:11,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964952962] [2020-10-27 06:32:11,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:11,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:11,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:11,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:11,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:12,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:14,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:16,640 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:16,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 06:32:16,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 06:32:16,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 06:32:16,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:16,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 06:32:16,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:32:16,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 06:32:16,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:16,965 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:32:16,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:16,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:17,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:17,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:17,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:17,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-27 06:32:17,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:17,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:32:17,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:17,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 06:32:17,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:17,029 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 06:32:17,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964952962] [2020-10-27 06:32:17,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:17,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 06:32:17,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096129863] [2020-10-27 06:32:17,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 06:32:17,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:17,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 06:32:17,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:32:17,032 INFO L87 Difference]: Start difference. First operand 873 states and 1368 transitions. Second operand 7 states. [2020-10-27 06:32:17,242 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:32:18,116 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 06:32:18,362 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 06:32:20,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:20,035 INFO L93 Difference]: Finished difference Result 1862 states and 2891 transitions. [2020-10-27 06:32:20,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 06:32:20,036 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 55 [2020-10-27 06:32:20,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:20,045 INFO L225 Difference]: With dead ends: 1862 [2020-10-27 06:32:20,045 INFO L226 Difference]: Without dead ends: 1009 [2020-10-27 06:32:20,049 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-27 06:32:20,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009 states. [2020-10-27 06:32:20,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009 to 865. [2020-10-27 06:32:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 865 states. [2020-10-27 06:32:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 865 states to 865 states and 1350 transitions. [2020-10-27 06:32:20,148 INFO L78 Accepts]: Start accepts. Automaton has 865 states and 1350 transitions. Word has length 55 [2020-10-27 06:32:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:20,149 INFO L481 AbstractCegarLoop]: Abstraction has 865 states and 1350 transitions. [2020-10-27 06:32:20,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 06:32:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 865 states and 1350 transitions. [2020-10-27 06:32:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 06:32:20,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:20,152 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:32:20,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 06:32:20,153 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:20,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:20,153 INFO L82 PathProgramCache]: Analyzing trace with hash -437035894, now seen corresponding path program 1 times [2020-10-27 06:32:20,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:20,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931994567] [2020-10-27 06:32:20,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:20,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:20,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:20,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:20,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:20,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:20,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:21,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:21,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:21,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:21,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:21,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:22,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:22,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:25,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:25,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 06:32:25,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 06:32:25,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 06:32:25,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:25,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 06:32:25,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:32:25,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 06:32:25,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:25,500 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:32:25,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:25,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:25,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:25,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:25,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:25,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:25,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 06:32:25,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:25,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:25,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:25,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:25,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:25,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:32:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:25,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:25,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:25,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 06:32:25,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:25,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-27 06:32:25,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:25,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:32:25,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:32:25,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 06:32:25,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 06:32:25,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [931994567] [2020-10-27 06:32:25,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:32:25,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 06:32:25,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041590282] [2020-10-27 06:32:25,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 06:32:25,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:25,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 06:32:25,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:32:25,670 INFO L87 Difference]: Start difference. First operand 865 states and 1350 transitions. Second operand 6 states. [2020-10-27 06:32:25,867 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:32:27,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:27,952 INFO L93 Difference]: Finished difference Result 1926 states and 3042 transitions. [2020-10-27 06:32:27,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 06:32:27,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-10-27 06:32:27,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:27,964 INFO L225 Difference]: With dead ends: 1926 [2020-10-27 06:32:27,964 INFO L226 Difference]: Without dead ends: 1081 [2020-10-27 06:32:27,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:32:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-10-27 06:32:28,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 1004. [2020-10-27 06:32:28,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1004 states. [2020-10-27 06:32:28,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1004 states to 1004 states and 1565 transitions. [2020-10-27 06:32:28,120 INFO L78 Accepts]: Start accepts. Automaton has 1004 states and 1565 transitions. Word has length 62 [2020-10-27 06:32:28,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:28,121 INFO L481 AbstractCegarLoop]: Abstraction has 1004 states and 1565 transitions. [2020-10-27 06:32:28,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 06:32:28,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1004 states and 1565 transitions. [2020-10-27 06:32:28,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 06:32:28,124 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:28,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:32:28,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 06:32:28,125 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:28,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:28,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1440245471, now seen corresponding path program 1 times [2020-10-27 06:32:28,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:28,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532320904] [2020-10-27 06:32:28,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:28,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:28,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:28,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:28,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:28,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:28,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:28,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:29,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:29,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:29,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:29,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:33,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:33,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:33,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 06:32:33,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 06:32:33,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 06:32:33,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:33,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 06:32:33,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:32:33,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 06:32:33,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:33,466 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:32:33,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:33,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:33,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:33,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:33,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:33,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 06:32:33,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:33,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:33,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:33,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:33,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:33,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:32:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:33,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:33,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:33,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 06:32:33,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:33,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 06:32:33,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:33,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:32:33,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:32:33,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 06:32:33,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:32:33,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 06:32:33,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532320904] [2020-10-27 06:32:33,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:32:33,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 06:32:33,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375899235] [2020-10-27 06:32:33,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 06:32:33,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:33,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 06:32:33,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:32:33,669 INFO L87 Difference]: Start difference. First operand 1004 states and 1565 transitions. Second operand 7 states. [2020-10-27 06:32:33,915 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:32:34,129 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 06:32:37,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:37,432 INFO L93 Difference]: Finished difference Result 3081 states and 4919 transitions. [2020-10-27 06:32:37,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 06:32:37,432 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-27 06:32:37,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:37,451 INFO L225 Difference]: With dead ends: 3081 [2020-10-27 06:32:37,451 INFO L226 Difference]: Without dead ends: 2097 [2020-10-27 06:32:37,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2020-10-27 06:32:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2020-10-27 06:32:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 1860. [2020-10-27 06:32:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1860 states. [2020-10-27 06:32:37,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2895 transitions. [2020-10-27 06:32:37,737 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2895 transitions. Word has length 62 [2020-10-27 06:32:37,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:37,738 INFO L481 AbstractCegarLoop]: Abstraction has 1860 states and 2895 transitions. [2020-10-27 06:32:37,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 06:32:37,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2895 transitions. [2020-10-27 06:32:37,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 06:32:37,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:37,742 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:32:37,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 06:32:37,742 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:37,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:37,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1826709559, now seen corresponding path program 1 times [2020-10-27 06:32:37,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:37,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499296229] [2020-10-27 06:32:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:37,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:37,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:37,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:37,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:38,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:38,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:38,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:38,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:38,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:38,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:38,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:39,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:42,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:42,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 06:32:42,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 06:32:42,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 06:32:42,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:42,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 06:32:42,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:32:42,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 06:32:42,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:43,016 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:32:43,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:43,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:43,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:43,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:43,032 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:43,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:32:43,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:43,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:43,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:43,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:32:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:43,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:43,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:43,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 06:32:43,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:43,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 06:32:43,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:43,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:32:43,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:43,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 06:32:43,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:43,138 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 06:32:43,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499296229] [2020-10-27 06:32:43,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:32:43,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 06:32:43,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738961216] [2020-10-27 06:32:43,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:32:43,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:43,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:32:43,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:32:43,142 INFO L87 Difference]: Start difference. First operand 1860 states and 2895 transitions. Second operand 5 states. [2020-10-27 06:32:43,364 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:32:45,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:45,198 INFO L93 Difference]: Finished difference Result 3800 states and 5990 transitions. [2020-10-27 06:32:45,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:32:45,198 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-27 06:32:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:45,213 INFO L225 Difference]: With dead ends: 3800 [2020-10-27 06:32:45,213 INFO L226 Difference]: Without dead ends: 1960 [2020-10-27 06:32:45,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:32:45,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2020-10-27 06:32:45,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1860. [2020-10-27 06:32:45,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1860 states. [2020-10-27 06:32:45,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1860 states to 1860 states and 2837 transitions. [2020-10-27 06:32:45,465 INFO L78 Accepts]: Start accepts. Automaton has 1860 states and 2837 transitions. Word has length 63 [2020-10-27 06:32:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:45,465 INFO L481 AbstractCegarLoop]: Abstraction has 1860 states and 2837 transitions. [2020-10-27 06:32:45,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:32:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 1860 states and 2837 transitions. [2020-10-27 06:32:45,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 06:32:45,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:45,468 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:32:45,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 06:32:45,468 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:45,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:45,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1483306859, now seen corresponding path program 1 times [2020-10-27 06:32:45,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:45,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669265296] [2020-10-27 06:32:45,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:45,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:45,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:45,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:45,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:45,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:45,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:46,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:48,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:50,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:50,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 06:32:50,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 06:32:50,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 06:32:50,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:32:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:32:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 06:32:50,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:50,739 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:32:50,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:50,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:50,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:50,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:50,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:50,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:50,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:32:50,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:50,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:50,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:50,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:50,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:50,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:32:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:50,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:50,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:50,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-27 06:32:50,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:50,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 06:32:50,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:32:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:32:50,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 06:32:50,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:32:50,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669265296] [2020-10-27 06:32:50,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:50,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 06:32:50,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798645205] [2020-10-27 06:32:50,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 06:32:50,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:50,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 06:32:50,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 06:32:50,911 INFO L87 Difference]: Start difference. First operand 1860 states and 2837 transitions. Second operand 8 states. [2020-10-27 06:32:51,134 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:32:52,494 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:32:52,706 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:32:57,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:32:57,536 INFO L93 Difference]: Finished difference Result 6632 states and 10855 transitions. [2020-10-27 06:32:57,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 06:32:57,537 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-10-27 06:32:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:32:57,575 INFO L225 Difference]: With dead ends: 6632 [2020-10-27 06:32:57,575 INFO L226 Difference]: Without dead ends: 4792 [2020-10-27 06:32:57,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-27 06:32:57,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4792 states. [2020-10-27 06:32:58,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4792 to 4297. [2020-10-27 06:32:58,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4297 states. [2020-10-27 06:32:58,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4297 states to 4297 states and 6984 transitions. [2020-10-27 06:32:58,177 INFO L78 Accepts]: Start accepts. Automaton has 4297 states and 6984 transitions. Word has length 64 [2020-10-27 06:32:58,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:32:58,177 INFO L481 AbstractCegarLoop]: Abstraction has 4297 states and 6984 transitions. [2020-10-27 06:32:58,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 06:32:58,177 INFO L276 IsEmpty]: Start isEmpty. Operand 4297 states and 6984 transitions. [2020-10-27 06:32:58,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 06:32:58,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:32:58,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:32:58,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 06:32:58,180 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:32:58,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:32:58,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1634207734, now seen corresponding path program 1 times [2020-10-27 06:32:58,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:32:58,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734321732] [2020-10-27 06:32:58,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:32:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:58,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:58,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:58,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:58,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 06:32:58,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:32:58,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 359 [2020-10-27 06:32:58,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:58,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:32:58,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:32:58,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 06:32:58,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:58,782 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:32:58,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:32:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:32:58,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:32:58,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:32:58,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:32:58,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:32:58,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:32:58,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:32:58,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:32:58,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:32:58,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:32:58,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:32:58,810 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 06:32:58,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734321732] [2020-10-27 06:32:58,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:32:58,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 06:32:58,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822402574] [2020-10-27 06:32:58,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 06:32:58,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:32:58,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 06:32:58,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 06:32:58,813 INFO L87 Difference]: Start difference. First operand 4297 states and 6984 transitions. Second operand 4 states. [2020-10-27 06:32:59,043 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:33:01,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:33:01,540 INFO L93 Difference]: Finished difference Result 12041 states and 21131 transitions. [2020-10-27 06:33:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 06:33:01,541 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-27 06:33:01,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:33:01,629 INFO L225 Difference]: With dead ends: 12041 [2020-10-27 06:33:01,630 INFO L226 Difference]: Without dead ends: 7764 [2020-10-27 06:33:01,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:33:01,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7764 states. [2020-10-27 06:33:02,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7764 to 7423. [2020-10-27 06:33:02,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7423 states. [2020-10-27 06:33:02,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7423 states to 7423 states and 12660 transitions. [2020-10-27 06:33:02,759 INFO L78 Accepts]: Start accepts. Automaton has 7423 states and 12660 transitions. Word has length 64 [2020-10-27 06:33:02,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:33:02,760 INFO L481 AbstractCegarLoop]: Abstraction has 7423 states and 12660 transitions. [2020-10-27 06:33:02,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 06:33:02,760 INFO L276 IsEmpty]: Start isEmpty. Operand 7423 states and 12660 transitions. [2020-10-27 06:33:02,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-27 06:33:02,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:33:02,764 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:33:02,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 06:33:02,765 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:33:02,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:33:02,765 INFO L82 PathProgramCache]: Analyzing trace with hash 343016195, now seen corresponding path program 1 times [2020-10-27 06:33:02,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:33:02,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608149302] [2020-10-27 06:33:02,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:33:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:02,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:02,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:02,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:03,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:03,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 06:33:03,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:33:03,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 785 [2020-10-27 06:33:03,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:03,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:33:03,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 06:33:03,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-27 06:33:03,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:03,910 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:33:03,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:33:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:03,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:03,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:03,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:33:03,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:03,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-27 06:33:03,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:03,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:03,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:03,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:03,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:04,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:33:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:04,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:04,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:04,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:33:04,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:04,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 06:33:04,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:04,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:33:04,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:04,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 06:33:04,099 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:04,171 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 06:33:04,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608149302] [2020-10-27 06:33:04,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:33:04,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 06:33:04,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57999509] [2020-10-27 06:33:04,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 06:33:04,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:33:04,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 06:33:04,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 06:33:04,174 INFO L87 Difference]: Start difference. First operand 7423 states and 12660 transitions. Second operand 10 states. [2020-10-27 06:33:04,425 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:33:04,907 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 06:33:05,233 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 06:33:05,797 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 06:33:06,055 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-27 06:33:07,541 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 06:33:07,893 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-27 06:33:08,453 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 06:33:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:33:10,317 INFO L93 Difference]: Finished difference Result 15208 states and 27422 transitions. [2020-10-27 06:33:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 06:33:10,318 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-27 06:33:10,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:33:10,392 INFO L225 Difference]: With dead ends: 15208 [2020-10-27 06:33:10,392 INFO L226 Difference]: Without dead ends: 7805 [2020-10-27 06:33:10,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2020-10-27 06:33:10,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7805 states. [2020-10-27 06:33:11,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7805 to 7063. [2020-10-27 06:33:11,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7063 states. [2020-10-27 06:33:11,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7063 states to 7063 states and 11848 transitions. [2020-10-27 06:33:11,438 INFO L78 Accepts]: Start accepts. Automaton has 7063 states and 11848 transitions. Word has length 79 [2020-10-27 06:33:11,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:33:11,438 INFO L481 AbstractCegarLoop]: Abstraction has 7063 states and 11848 transitions. [2020-10-27 06:33:11,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 06:33:11,438 INFO L276 IsEmpty]: Start isEmpty. Operand 7063 states and 11848 transitions. [2020-10-27 06:33:11,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 06:33:11,443 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:33:11,443 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:33:11,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 06:33:11,443 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:33:11,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:33:11,444 INFO L82 PathProgramCache]: Analyzing trace with hash -771525297, now seen corresponding path program 1 times [2020-10-27 06:33:11,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:33:11,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092753428] [2020-10-27 06:33:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:33:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:11,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:11,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:12,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:12,232 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-27 06:33:12,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:33:12,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 757 [2020-10-27 06:33:12,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 06:33:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-27 06:33:12,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 06:33:12,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:12,478 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:33:12,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:33:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:12,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:12,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:12,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:33:12,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:12,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 06:33:12,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:12,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:12,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:12,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:33:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:12,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:12,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:12,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:33:12,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:12,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 06:33:12,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:12,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:33:12,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:12,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 06:33:12,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:12,657 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 06:33:12,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092753428] [2020-10-27 06:33:12,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:33:12,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-27 06:33:12,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629514128] [2020-10-27 06:33:12,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 06:33:12,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:33:12,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 06:33:12,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 06:33:12,659 INFO L87 Difference]: Start difference. First operand 7063 states and 11848 transitions. Second operand 10 states. [2020-10-27 06:33:12,885 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:33:13,373 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 06:33:13,715 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 06:33:14,199 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 06:33:14,481 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 172 [2020-10-27 06:33:15,475 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:33:15,759 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 171 [2020-10-27 06:33:17,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:33:17,435 INFO L93 Difference]: Finished difference Result 12826 states and 22086 transitions. [2020-10-27 06:33:17,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 06:33:17,436 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 80 [2020-10-27 06:33:17,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:33:17,492 INFO L225 Difference]: With dead ends: 12826 [2020-10-27 06:33:17,493 INFO L226 Difference]: Without dead ends: 7686 [2020-10-27 06:33:17,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-27 06:33:17,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7686 states. [2020-10-27 06:33:18,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7686 to 7023. [2020-10-27 06:33:18,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7023 states. [2020-10-27 06:33:18,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7023 states to 7023 states and 11758 transitions. [2020-10-27 06:33:18,289 INFO L78 Accepts]: Start accepts. Automaton has 7023 states and 11758 transitions. Word has length 80 [2020-10-27 06:33:18,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:33:18,289 INFO L481 AbstractCegarLoop]: Abstraction has 7023 states and 11758 transitions. [2020-10-27 06:33:18,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 06:33:18,290 INFO L276 IsEmpty]: Start isEmpty. Operand 7023 states and 11758 transitions. [2020-10-27 06:33:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 06:33:18,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:33:18,296 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:33:18,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 06:33:18,296 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:33:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:33:18,297 INFO L82 PathProgramCache]: Analyzing trace with hash -893561030, now seen corresponding path program 1 times [2020-10-27 06:33:18,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:33:18,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1684035755] [2020-10-27 06:33:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:33:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:18,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:18,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:18,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:18,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:18,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:18,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:19,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:19,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:19,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:21,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:21,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:21,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:21,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:22,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:23,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:23,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 06:33:23,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 06:33:23,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 06:33:23,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:23,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:33:23,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:33:23,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 06:33:23,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 06:33:23,540 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:33:23,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:33:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:23,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:23,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:23,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:33:23,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:23,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:33:23,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:23,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:23,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:23,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:23,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:23,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:33:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:23,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:23,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:23,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-27 06:33:23,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:23,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 06:33:23,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:23,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:33:23,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:33:23,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 06:33:23,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:23,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-27 06:33:23,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:23,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:23,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:23,788 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:23,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 06:33:23,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:33:23,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-27 06:33:23,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:23,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:33:23,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-27 06:33:23,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 06:33:23,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 06:33:23,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:33:23,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1684035755] [2020-10-27 06:33:23,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:33:23,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-27 06:33:23,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986536265] [2020-10-27 06:33:23,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 06:33:23,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:33:23,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 06:33:23,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-27 06:33:23,829 INFO L87 Difference]: Start difference. First operand 7023 states and 11758 transitions. Second operand 9 states. [2020-10-27 06:33:24,065 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:33:24,345 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:33:25,200 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:33:25,555 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:33:26,243 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-27 06:33:31,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:33:31,213 INFO L93 Difference]: Finished difference Result 20460 states and 41956 transitions. [2020-10-27 06:33:31,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 06:33:31,214 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 89 [2020-10-27 06:33:31,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:33:31,366 INFO L225 Difference]: With dead ends: 20460 [2020-10-27 06:33:31,367 INFO L226 Difference]: Without dead ends: 13457 [2020-10-27 06:33:31,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=179, Invalid=577, Unknown=0, NotChecked=0, Total=756 [2020-10-27 06:33:31,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13457 states. [2020-10-27 06:33:32,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13457 to 12559. [2020-10-27 06:33:32,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12559 states. [2020-10-27 06:33:33,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12559 states to 12559 states and 25145 transitions. [2020-10-27 06:33:33,166 INFO L78 Accepts]: Start accepts. Automaton has 12559 states and 25145 transitions. Word has length 89 [2020-10-27 06:33:33,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:33:33,166 INFO L481 AbstractCegarLoop]: Abstraction has 12559 states and 25145 transitions. [2020-10-27 06:33:33,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 06:33:33,166 INFO L276 IsEmpty]: Start isEmpty. Operand 12559 states and 25145 transitions. [2020-10-27 06:33:33,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 06:33:33,172 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:33:33,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:33:33,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 06:33:33,173 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:33:33,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:33:33,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2027455001, now seen corresponding path program 1 times [2020-10-27 06:33:33,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:33:33,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1456160505] [2020-10-27 06:33:33,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:33:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:33,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:33,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:33,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:33,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:33,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:34,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:34,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:34,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:34,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:34,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:37,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:37,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:38,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:38,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-27 06:33:38,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-27 06:33:38,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 06:33:38,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:38,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 06:33:38,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:33:38,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-27 06:33:38,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:38,492 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:33:38,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:33:38,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:38,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:38,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:38,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:33:38,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:38,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:33:38,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:38,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:38,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:38,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:38,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:38,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 06:33:38,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:38,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:38,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:38,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:38,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 06:33:38,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 06:33:38,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 06:33:38,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:38,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:33:38,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:33:38,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 06:33:38,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:38,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 06:33:38,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1456160505] [2020-10-27 06:33:38,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:33:38,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 06:33:38,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403361025] [2020-10-27 06:33:38,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 06:33:38,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:33:38,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 06:33:38,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:33:38,617 INFO L87 Difference]: Start difference. First operand 12559 states and 25145 transitions. Second operand 7 states. [2020-10-27 06:33:38,851 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:33:39,393 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:33:44,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:33:44,611 INFO L93 Difference]: Finished difference Result 32696 states and 71308 transitions. [2020-10-27 06:33:44,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 06:33:44,611 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-10-27 06:33:44,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:33:45,236 INFO L225 Difference]: With dead ends: 32696 [2020-10-27 06:33:45,237 INFO L226 Difference]: Without dead ends: 20154 [2020-10-27 06:33:45,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-27 06:33:45,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20154 states. [2020-10-27 06:33:48,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20154 to 18979. [2020-10-27 06:33:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18979 states. [2020-10-27 06:33:48,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18979 states to 18979 states and 41246 transitions. [2020-10-27 06:33:48,531 INFO L78 Accepts]: Start accepts. Automaton has 18979 states and 41246 transitions. Word has length 93 [2020-10-27 06:33:48,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:33:48,531 INFO L481 AbstractCegarLoop]: Abstraction has 18979 states and 41246 transitions. [2020-10-27 06:33:48,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 06:33:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 18979 states and 41246 transitions. [2020-10-27 06:33:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 06:33:48,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:33:48,545 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:33:48,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 06:33:48,546 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:33:48,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:33:48,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1654900154, now seen corresponding path program 1 times [2020-10-27 06:33:48,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:33:48,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81752996] [2020-10-27 06:33:48,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:33:48,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:48,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:48,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:48,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:48,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:48,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:48,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:49,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:49,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:50,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:50,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:50,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:53,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:53,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 06:33:53,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 06:33:53,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 06:33:53,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:53,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 06:33:53,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:33:53,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 06:33:53,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:53,797 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:33:53,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:33:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:53,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:53,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:53,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:33:53,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:53,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:33:53,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:53,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:33:53,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:53,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:33:53,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:53,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:33:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:53,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:53,915 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:53,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:33:53,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:33:53,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-27 06:33:53,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:53,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:33:53,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:33:53,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 06:33:53,916 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:53,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 06:33:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:33:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:53,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:53,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:33:53,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:33:53,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 06:33:53,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 06:33:53,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 06:33:53,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:33:53,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:33:53,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 06:33:53,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 06:33:53,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:33:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 06:33:54,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81752996] [2020-10-27 06:33:54,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:33:54,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 06:33:54,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273932406] [2020-10-27 06:33:54,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 06:33:54,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:33:54,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 06:33:54,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:33:54,023 INFO L87 Difference]: Start difference. First operand 18979 states and 41246 transitions. Second operand 6 states. [2020-10-27 06:33:54,239 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:33:54,838 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:34:00,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:34:00,479 INFO L93 Difference]: Finished difference Result 49196 states and 142051 transitions. [2020-10-27 06:34:00,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 06:34:00,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 105 [2020-10-27 06:34:00,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:34:01,613 INFO L225 Difference]: With dead ends: 49196 [2020-10-27 06:34:01,613 INFO L226 Difference]: Without dead ends: 30523 [2020-10-27 06:34:02,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2020-10-27 06:34:02,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30523 states. [2020-10-27 06:34:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30523 to 29578. [2020-10-27 06:34:07,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29578 states. [2020-10-27 06:34:08,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29578 states to 29578 states and 73767 transitions. [2020-10-27 06:34:08,204 INFO L78 Accepts]: Start accepts. Automaton has 29578 states and 73767 transitions. Word has length 105 [2020-10-27 06:34:08,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:34:08,204 INFO L481 AbstractCegarLoop]: Abstraction has 29578 states and 73767 transitions. [2020-10-27 06:34:08,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 06:34:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 29578 states and 73767 transitions. [2020-10-27 06:34:08,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-27 06:34:08,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:34:08,221 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:34:08,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 06:34:08,221 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:34:08,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:34:08,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1619914015, now seen corresponding path program 1 times [2020-10-27 06:34:08,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:34:08,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260059094] [2020-10-27 06:34:08,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:34:08,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:08,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:08,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:08,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:08,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:08,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:08,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:08,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:08,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:09,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:09,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:11,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:11,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:12,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:12,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:12,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:13,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:34:13,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-27 06:34:13,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-27 06:34:13,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 06:34:13,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:34:13,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:34:13,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 06:34:13,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 06:34:13,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:34:13,468 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:34:13,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:34:13,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:13,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:13,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:34:13,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:34:13,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:34:13,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:34:13,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:34:13,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:34:13,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:34:13,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:34:13,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:34:13,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-10-27 06:34:13,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:13,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:13,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:34:13,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-27 06:34:13,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:34:13,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 06:34:13,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:34:13,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:34:13,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-27 06:34:13,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:34:13,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:34:13,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-10-27 06:34:13,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:13,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:13,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:34:13,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 06:34:13,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:34:13,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 06:34:13,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:34:13,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:34:13,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 06:34:13,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:34:13,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:34:13,574 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-27 06:34:13,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260059094] [2020-10-27 06:34:13,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:34:13,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:34:13,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175951602] [2020-10-27 06:34:13,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:34:13,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:34:13,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:34:13,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:34:13,576 INFO L87 Difference]: Start difference. First operand 29578 states and 73767 transitions. Second operand 5 states. [2020-10-27 06:34:13,813 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:34:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:34:20,936 INFO L93 Difference]: Finished difference Result 74298 states and 229745 transitions. [2020-10-27 06:34:20,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:34:20,937 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 107 [2020-10-27 06:34:20,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:34:22,171 INFO L225 Difference]: With dead ends: 74298 [2020-10-27 06:34:22,171 INFO L226 Difference]: Without dead ends: 44738 [2020-10-27 06:34:23,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:34:23,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44738 states. [2020-10-27 06:34:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44738 to 43175. [2020-10-27 06:34:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43175 states. [2020-10-27 06:34:32,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43175 states to 43175 states and 116394 transitions. [2020-10-27 06:34:32,479 INFO L78 Accepts]: Start accepts. Automaton has 43175 states and 116394 transitions. Word has length 107 [2020-10-27 06:34:32,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:34:32,479 INFO L481 AbstractCegarLoop]: Abstraction has 43175 states and 116394 transitions. [2020-10-27 06:34:32,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:34:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 43175 states and 116394 transitions. [2020-10-27 06:34:32,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 06:34:32,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:34:32,500 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:34:32,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 06:34:32,500 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:34:32,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:34:32,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2127091568, now seen corresponding path program 1 times [2020-10-27 06:34:32,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:34:32,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421959703] [2020-10-27 06:34:32,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:34:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:32,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:32,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:32,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:32,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:32,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:33,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:33,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:33,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:33,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:34,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:34,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:37,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:34:37,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 06:34:37,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 06:34:37,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 06:34:37,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:34:37,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 06:34:37,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 06:34:37,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 06:34:37,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:34:37,723 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:34:37,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:34:37,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:37,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:37,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:34:37,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:34:37,735 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:34:37,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:34:37,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:34:37,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:34:37,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:34:37,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:34:37,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:34:37,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:34:37,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:37,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:37,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:34:37,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:34:37,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:34:37,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 06:34:37,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:34:37,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:34:37,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 06:34:37,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:34:37,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:34:37,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 06:34:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:37,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:37,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:34:37,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 06:34:37,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:34:37,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:34:37,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:34:37,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:34:37,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 06:34:37,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:34:37,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:34:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-27 06:34:37,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421959703] [2020-10-27 06:34:37,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 06:34:37,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 06:34:37,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339811689] [2020-10-27 06:34:37,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 06:34:37,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:34:37,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 06:34:37,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 06:34:37,854 INFO L87 Difference]: Start difference. First operand 43175 states and 116394 transitions. Second operand 5 states. [2020-10-27 06:34:38,062 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-27 06:34:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:34:44,897 INFO L93 Difference]: Finished difference Result 86216 states and 231739 transitions. [2020-10-27 06:34:44,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 06:34:44,897 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 108 [2020-10-27 06:34:44,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:34:45,763 INFO L225 Difference]: With dead ends: 86216 [2020-10-27 06:34:45,763 INFO L226 Difference]: Without dead ends: 43059 [2020-10-27 06:34:47,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-27 06:34:47,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43059 states. [2020-10-27 06:34:53,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43059 to 42847. [2020-10-27 06:34:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42847 states. [2020-10-27 06:34:55,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42847 states to 42847 states and 114499 transitions. [2020-10-27 06:34:55,090 INFO L78 Accepts]: Start accepts. Automaton has 42847 states and 114499 transitions. Word has length 108 [2020-10-27 06:34:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 06:34:55,090 INFO L481 AbstractCegarLoop]: Abstraction has 42847 states and 114499 transitions. [2020-10-27 06:34:55,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 06:34:55,103 INFO L276 IsEmpty]: Start isEmpty. Operand 42847 states and 114499 transitions. [2020-10-27 06:34:55,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-27 06:34:55,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 06:34:55,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 06:34:55,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 06:34:55,126 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 06:34:55,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 06:34:55,127 INFO L82 PathProgramCache]: Analyzing trace with hash 270378962, now seen corresponding path program 1 times [2020-10-27 06:34:55,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 06:34:55,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121122420] [2020-10-27 06:34:55,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 06:34:55,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:34:55,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:55,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:55,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:55,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:55,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:55,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:55,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:55,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:56,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:34:56,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:35:00,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:35:00,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 06:35:00,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 06:35:00,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 06:35:00,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:35:00,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 06:35:00,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 06:35:00,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 06:35:00,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:35:00,407 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-27 06:35:00,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 06:35:00,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:35:00,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:35:00,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:35:00,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 06:35:00,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:35:00,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 06:35:00,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:35:00,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:35:00,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 06:35:00,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:35:00,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:35:00,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-27 06:35:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:35:00,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:35:00,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:35:00,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-27 06:35:00,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:35:00,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-27 06:35:00,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:35:00,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 06:35:00,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 06:35:00,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 06:35:00,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:35:00,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-27 06:35:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 06:35:00,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 06:35:00,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 06:35:00,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-27 06:35:00,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 06:35:00,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 06:35:00,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 06:35:00,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 06:35:00,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 06:35:00,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 06:35:00,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 06:35:00,593 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 06:35:00,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121122420] [2020-10-27 06:35:00,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 06:35:00,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 06:35:00,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554482633] [2020-10-27 06:35:00,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 06:35:00,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 06:35:00,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 06:35:00,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 06:35:00,596 INFO L87 Difference]: Start difference. First operand 42847 states and 114499 transitions. Second operand 6 states. [2020-10-27 06:35:00,817 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-27 06:35:14,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 06:35:14,019 INFO L93 Difference]: Finished difference Result 112867 states and 325728 transitions. [2020-10-27 06:35:14,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 06:35:14,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 108 [2020-10-27 06:35:14,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 06:35:15,148 INFO L225 Difference]: With dead ends: 112867 [2020-10-27 06:35:15,148 INFO L226 Difference]: Without dead ends: 70042