/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=DEEPEST --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.3.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 01:01:03,029 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 01:01:03,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 01:01:03,090 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 01:01:03,091 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 01:01:03,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 01:01:03,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 01:01:03,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 01:01:03,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 01:01:03,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 01:01:03,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 01:01:03,120 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 01:01:03,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 01:01:03,124 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 01:01:03,129 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 01:01:03,132 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 01:01:03,133 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 01:01:03,156 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 01:01:03,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 01:01:03,170 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 01:01:03,175 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 01:01:03,177 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 01:01:03,179 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 01:01:03,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 01:01:03,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 01:01:03,192 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 01:01:03,192 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 01:01:03,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 01:01:03,196 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 01:01:03,198 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 01:01:03,198 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 01:01:03,199 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 01:01:03,201 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 01:01:03,202 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 01:01:03,204 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 01:01:03,204 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 01:01:03,205 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 01:01:03,205 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 01:01:03,205 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 01:01:03,206 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 01:01:03,207 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 01:01:03,215 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 [2020-10-28 01:01:03,269 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 01:01:03,270 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 01:01:03,274 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 01:01:03,274 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 01:01:03,274 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 01:01:03,275 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 01:01:03,275 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 01:01:03,275 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 01:01:03,275 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 01:01:03,276 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 01:01:03,276 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 01:01:03,276 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 01:01:03,276 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 01:01:03,277 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 01:01:03,277 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 01:01:03,277 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 01:01:03,277 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 01:01:03,278 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 01:01:03,278 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 01:01:03,278 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 01:01:03,278 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 01:01:03,278 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 01:01:03,279 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 01:01:03,279 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 01:01:03,279 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 01:01:03,279 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 01:01:03,280 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 01:01:03,280 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 01:01:03,280 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 01:01:03,280 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 01:01:03,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 01:01:03,709 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 01:01:03,713 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 01:01:03,714 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 01:01:03,715 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 01:01:03,716 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/mem_slave_tlm.3.cil.c [2020-10-28 01:01:03,807 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43a3dd7a4/25a98ab8338d411dbb483b66a87a36bc/FLAG94c05742b [2020-10-28 01:01:04,582 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 01:01:04,582 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/systemc/mem_slave_tlm.3.cil.c [2020-10-28 01:01:04,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43a3dd7a4/25a98ab8338d411dbb483b66a87a36bc/FLAG94c05742b [2020-10-28 01:01:04,873 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/43a3dd7a4/25a98ab8338d411dbb483b66a87a36bc [2020-10-28 01:01:04,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 01:01:04,887 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 01:01:04,892 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 01:01:04,892 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 01:01:04,896 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 01:01:04,898 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:01:04" (1/1) ... [2020-10-28 01:01:04,903 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3700ee28 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:04, skipping insertion in model container [2020-10-28 01:01:04,903 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 01:01:04" (1/1) ... [2020-10-28 01:01:04,913 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 01:01:04,992 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 01:01:05,439 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 01:01:05,461 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 01:01:05,577 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 01:01:05,600 INFO L208 MainTranslator]: Completed translation [2020-10-28 01:01:05,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:05 WrapperNode [2020-10-28 01:01:05,601 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 01:01:05,602 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 01:01:05,602 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 01:01:05,602 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 01:01:05,618 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:05" (1/1) ... [2020-10-28 01:01:05,618 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:05" (1/1) ... [2020-10-28 01:01:05,632 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:05" (1/1) ... [2020-10-28 01:01:05,633 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:05" (1/1) ... [2020-10-28 01:01:05,671 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:05" (1/1) ... [2020-10-28 01:01:05,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:05" (1/1) ... [2020-10-28 01:01:05,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:05" (1/1) ... [2020-10-28 01:01:05,750 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 01:01:05,751 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 01:01:05,751 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 01:01:05,752 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 01:01:05,753 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:05" (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 [2020-10-28 01:01:05,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 01:01:05,838 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 01:01:05,838 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 01:01:05,838 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2020-10-28 01:01:05,839 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_read [2020-10-28 01:01:05,839 INFO L138 BoogieDeclarations]: Found implementation of procedure s_memory_write [2020-10-28 01:01:05,839 INFO L138 BoogieDeclarations]: Found implementation of procedure m_run [2020-10-28 01:01:05,839 INFO L138 BoogieDeclarations]: Found implementation of procedure s_run [2020-10-28 01:01:05,839 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2020-10-28 01:01:05,840 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2020-10-28 01:01:05,840 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 01:01:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 01:01:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 01:01:05,840 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 01:01:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 01:01:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 01:01:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure error [2020-10-28 01:01:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_read [2020-10-28 01:01:05,841 INFO L130 BoogieDeclarations]: Found specification of procedure s_memory_write [2020-10-28 01:01:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure m_run [2020-10-28 01:01:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure s_run [2020-10-28 01:01:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2020-10-28 01:01:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2020-10-28 01:01:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 01:01:05,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 01:01:05,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 01:01:05,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 01:01:05,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 01:01:05,843 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 01:01:05,843 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 01:01:07,451 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 01:01:07,451 INFO L298 CfgBuilder]: Removed 13 assume(true) statements. [2020-10-28 01:01:07,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:01:07 BoogieIcfgContainer [2020-10-28 01:01:07,454 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 01:01:07,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 01:01:07,457 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 01:01:07,461 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 01:01:07,461 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 01:01:04" (1/3) ... [2020-10-28 01:01:07,462 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58118847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:01:07, skipping insertion in model container [2020-10-28 01:01:07,462 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 01:01:05" (2/3) ... [2020-10-28 01:01:07,463 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58118847 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 01:01:07, skipping insertion in model container [2020-10-28 01:01:07,463 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 01:01:07" (3/3) ... [2020-10-28 01:01:07,465 INFO L111 eAbstractionObserver]: Analyzing ICFG mem_slave_tlm.3.cil.c [2020-10-28 01:01:07,486 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 01:01:07,492 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 01:01:07,524 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 01:01:07,554 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 01:01:07,554 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 01:01:07,554 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 01:01:07,554 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 01:01:07,554 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 01:01:07,554 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 01:01:07,555 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 01:01:07,555 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 01:01:07,583 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states. [2020-10-28 01:01:07,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 01:01:07,596 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:07,597 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] [2020-10-28 01:01:07,598 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:07,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:07,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1623442805, now seen corresponding path program 1 times [2020-10-28 01:01:07,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:07,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431274234] [2020-10-28 01:01:07,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:08,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:08,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:08,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:08,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:09,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:09,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:09,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:10,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:10,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:10,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:10,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:11,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:11,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:11,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:13,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:13,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 01:01:13,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 01:01:13,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 01:01:13,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:13,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:13,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 01:01:13,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:13,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 01:01:13,625 WARN L193 SmtUtils]: Spent 510.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:01:13,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:13,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:13,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:13,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:13,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:13,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 01:01:13,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:13,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:13,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:13,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:13,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 01:01:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:01:13,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431274234] [2020-10-28 01:01:13,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:13,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 01:01:13,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427880826] [2020-10-28 01:01:13,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 01:01:13,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:13,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 01:01:13,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 01:01:13,742 INFO L87 Difference]: Start difference. First operand 306 states. Second operand 3 states. [2020-10-28 01:01:15,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:15,849 INFO L93 Difference]: Finished difference Result 632 states and 1121 transitions. [2020-10-28 01:01:15,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 01:01:15,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-10-28 01:01:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:15,867 INFO L225 Difference]: With dead ends: 632 [2020-10-28 01:01:15,867 INFO L226 Difference]: Without dead ends: 345 [2020-10-28 01:01:15,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 01:01:15,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-28 01:01:15,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 294. [2020-10-28 01:01:15,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-10-28 01:01:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 493 transitions. [2020-10-28 01:01:15,972 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 493 transitions. Word has length 40 [2020-10-28 01:01:15,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:15,972 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 493 transitions. [2020-10-28 01:01:15,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 01:01:15,973 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 493 transitions. [2020-10-28 01:01:15,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 01:01:15,977 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:15,977 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] [2020-10-28 01:01:15,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 01:01:15,978 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:15,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:15,979 INFO L82 PathProgramCache]: Analyzing trace with hash -331765790, now seen corresponding path program 1 times [2020-10-28 01:01:15,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:15,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460974368] [2020-10-28 01:01:15,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:16,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:16,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:16,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:16,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:16,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:16,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:17,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:17,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:17,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:17,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:17,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:17,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:18,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:18,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:21,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:21,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 01:01:21,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 01:01:21,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 01:01:21,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:01:21,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 01:01:21,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 01:01:21,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:21,470 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:01:21,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:21,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:21,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:21,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:21,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:21,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:21,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 01:01:21,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:21,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:21,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:21,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:21,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 01:01:21,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:01:21,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460974368] [2020-10-28 01:01:21,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:21,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:01:21,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684650518] [2020-10-28 01:01:21,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:01:21,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:21,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:01:21,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:01:21,518 INFO L87 Difference]: Start difference. First operand 294 states and 493 transitions. Second operand 4 states. [2020-10-28 01:01:22,064 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:01:24,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:24,478 INFO L93 Difference]: Finished difference Result 863 states and 1416 transitions. [2020-10-28 01:01:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:01:24,480 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-28 01:01:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:24,486 INFO L225 Difference]: With dead ends: 863 [2020-10-28 01:01:24,486 INFO L226 Difference]: Without dead ends: 595 [2020-10-28 01:01:24,491 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:01:24,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2020-10-28 01:01:24,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 527. [2020-10-28 01:01:24,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 527 states. [2020-10-28 01:01:24,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 861 transitions. [2020-10-28 01:01:24,597 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 861 transitions. Word has length 41 [2020-10-28 01:01:24,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:24,597 INFO L481 AbstractCegarLoop]: Abstraction has 527 states and 861 transitions. [2020-10-28 01:01:24,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:01:24,598 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 861 transitions. [2020-10-28 01:01:24,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 01:01:24,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:24,603 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] [2020-10-28 01:01:24,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 01:01:24,604 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:24,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:24,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2067502559, now seen corresponding path program 1 times [2020-10-28 01:01:24,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:24,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853616845] [2020-10-28 01:01:24,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:24,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:24,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:24,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:24,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:24,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:25,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:25,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:25,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:25,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:25,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:25,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:26,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:27,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:29,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:29,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 01:01:29,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 01:01:29,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 01:01:29,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:29,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:01:29,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 01:01:29,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 01:01:29,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:30,023 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:01:30,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:30,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:30,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:30,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:30,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:30,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 01:01:30,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:30,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:30,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:30,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:01:30,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853616845] [2020-10-28 01:01:30,062 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:30,062 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:01:30,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166809997] [2020-10-28 01:01:30,063 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:01:30,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:30,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:01:30,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:01:30,064 INFO L87 Difference]: Start difference. First operand 527 states and 861 transitions. Second operand 4 states. [2020-10-28 01:01:30,442 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:01:33,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:33,153 INFO L93 Difference]: Finished difference Result 1569 states and 2533 transitions. [2020-10-28 01:01:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:01:33,154 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-28 01:01:33,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:33,162 INFO L225 Difference]: With dead ends: 1569 [2020-10-28 01:01:33,162 INFO L226 Difference]: Without dead ends: 1069 [2020-10-28 01:01:33,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:01:33,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2020-10-28 01:01:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 961. [2020-10-28 01:01:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 961 states. [2020-10-28 01:01:33,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 961 states to 961 states and 1527 transitions. [2020-10-28 01:01:33,260 INFO L78 Accepts]: Start accepts. Automaton has 961 states and 1527 transitions. Word has length 44 [2020-10-28 01:01:33,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:33,261 INFO L481 AbstractCegarLoop]: Abstraction has 961 states and 1527 transitions. [2020-10-28 01:01:33,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:01:33,261 INFO L276 IsEmpty]: Start isEmpty. Operand 961 states and 1527 transitions. [2020-10-28 01:01:33,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 01:01:33,264 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:33,264 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] [2020-10-28 01:01:33,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 01:01:33,265 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:33,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:33,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1249427251, now seen corresponding path program 1 times [2020-10-28 01:01:33,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:33,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275001107] [2020-10-28 01:01:33,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:33,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:33,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:33,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:33,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:33,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:33,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:34,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:35,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:38,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:38,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 01:01:38,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 01:01:38,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4862 [2020-10-28 01:01:38,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:38,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:01:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 01:01:38,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 01:01:38,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 01:01:38,406 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:01:38,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:38,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:38,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:38,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:38,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:38,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 01:01:38,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:38,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:38,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:38,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:38,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:38,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:01:38,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275001107] [2020-10-28 01:01:38,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:38,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:01:38,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123893956] [2020-10-28 01:01:38,442 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:01:38,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:38,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:01:38,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:01:38,444 INFO L87 Difference]: Start difference. First operand 961 states and 1527 transitions. Second operand 4 states. [2020-10-28 01:01:38,674 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:01:40,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:40,941 INFO L93 Difference]: Finished difference Result 2809 states and 4479 transitions. [2020-10-28 01:01:40,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:01:40,941 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-28 01:01:40,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:40,957 INFO L225 Difference]: With dead ends: 2809 [2020-10-28 01:01:40,958 INFO L226 Difference]: Without dead ends: 1877 [2020-10-28 01:01:40,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:01:40,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1877 states. [2020-10-28 01:01:41,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1877 to 1713. [2020-10-28 01:01:41,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1713 states. [2020-10-28 01:01:41,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1713 states to 1713 states and 2743 transitions. [2020-10-28 01:01:41,127 INFO L78 Accepts]: Start accepts. Automaton has 1713 states and 2743 transitions. Word has length 44 [2020-10-28 01:01:41,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:41,127 INFO L481 AbstractCegarLoop]: Abstraction has 1713 states and 2743 transitions. [2020-10-28 01:01:41,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:01:41,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1713 states and 2743 transitions. [2020-10-28 01:01:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 01:01:41,130 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:41,130 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] [2020-10-28 01:01:41,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 01:01:41,131 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:41,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:41,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1612530989, now seen corresponding path program 1 times [2020-10-28 01:01:41,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:41,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117204934] [2020-10-28 01:01:41,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:41,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:41,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:41,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:41,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:41,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:41,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:41,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:42,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:42,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:43,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:43,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:45,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:45,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 01:01:45,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 01:01:45,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4254 [2020-10-28 01:01:45,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:45,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 01:01:45,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 01:01:45,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 01:01:45,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:45,725 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:01:45,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:45,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:45,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:45,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:45,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:45,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:45,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 01:01:45,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:45,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:45,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:45,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:45,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 01:01:45,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:01:45,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117204934] [2020-10-28 01:01:45,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:45,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:01:45,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706996313] [2020-10-28 01:01:45,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:01:45,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:45,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:01:45,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:01:45,781 INFO L87 Difference]: Start difference. First operand 1713 states and 2743 transitions. Second operand 4 states. [2020-10-28 01:01:46,053 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:01:48,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:48,366 INFO L93 Difference]: Finished difference Result 4325 states and 6955 transitions. [2020-10-28 01:01:48,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:01:48,366 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 43 [2020-10-28 01:01:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:48,386 INFO L225 Difference]: With dead ends: 4325 [2020-10-28 01:01:48,386 INFO L226 Difference]: Without dead ends: 2629 [2020-10-28 01:01:48,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:01:48,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2629 states. [2020-10-28 01:01:48,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2629 to 2407. [2020-10-28 01:01:48,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2407 states. [2020-10-28 01:01:48,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 3695 transitions. [2020-10-28 01:01:48,637 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 3695 transitions. Word has length 43 [2020-10-28 01:01:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:48,637 INFO L481 AbstractCegarLoop]: Abstraction has 2407 states and 3695 transitions. [2020-10-28 01:01:48,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:01:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 3695 transitions. [2020-10-28 01:01:48,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 01:01:48,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:48,640 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] [2020-10-28 01:01:48,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 01:01:48,642 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:48,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:48,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1748432467, now seen corresponding path program 1 times [2020-10-28 01:01:48,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:48,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255685272] [2020-10-28 01:01:48,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:48,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:48,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:48,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:48,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:48,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:48,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:49,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:50,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:50,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 01:01:50,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 01:01:50,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2145 [2020-10-28 01:01:50,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:50,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 01:01:50,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 01:01:50,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 01:01:50,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:51,097 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:01:51,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:51,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:51,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:51,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:51,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:51,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:51,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 01:01:51,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:51,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:51,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:51,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:51,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:01:51,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255685272] [2020-10-28 01:01:51,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:51,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:01:51,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499841498] [2020-10-28 01:01:51,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:01:51,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:51,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:01:51,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:01:51,130 INFO L87 Difference]: Start difference. First operand 2407 states and 3695 transitions. Second operand 4 states. [2020-10-28 01:01:51,410 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:01:53,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:53,209 INFO L93 Difference]: Finished difference Result 5113 states and 7892 transitions. [2020-10-28 01:01:53,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:01:53,211 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-28 01:01:53,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:53,227 INFO L225 Difference]: With dead ends: 5113 [2020-10-28 01:01:53,228 INFO L226 Difference]: Without dead ends: 2733 [2020-10-28 01:01:53,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:01:53,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2733 states. [2020-10-28 01:01:53,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2733 to 2399. [2020-10-28 01:01:53,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2399 states. [2020-10-28 01:01:53,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2399 states to 2399 states and 3627 transitions. [2020-10-28 01:01:53,448 INFO L78 Accepts]: Start accepts. Automaton has 2399 states and 3627 transitions. Word has length 45 [2020-10-28 01:01:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:53,448 INFO L481 AbstractCegarLoop]: Abstraction has 2399 states and 3627 transitions. [2020-10-28 01:01:53,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:01:53,449 INFO L276 IsEmpty]: Start isEmpty. Operand 2399 states and 3627 transitions. [2020-10-28 01:01:53,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 01:01:53,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:53,452 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] [2020-10-28 01:01:53,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 01:01:53,452 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:53,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:53,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1771786035, now seen corresponding path program 1 times [2020-10-28 01:01:53,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:53,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1848014238] [2020-10-28 01:01:53,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:53,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:53,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:54,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:54,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 01:01:54,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 01:01:54,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1145 [2020-10-28 01:01:54,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:54,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 01:01:54,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 01:01:54,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 01:01:54,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:54,948 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:01:54,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:01:54,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:54,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:54,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:01:54,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:01:54,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:01:54,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 01:01:54,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:01:54,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:01:54,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:01:54,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:01:54,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:01:54,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:01:54,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1848014238] [2020-10-28 01:01:54,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:01:54,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:01:54,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912102180] [2020-10-28 01:01:54,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:01:54,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:01:54,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:01:54,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:01:54,998 INFO L87 Difference]: Start difference. First operand 2399 states and 3627 transitions. Second operand 4 states. [2020-10-28 01:01:55,263 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:01:57,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:01:57,606 INFO L93 Difference]: Finished difference Result 5945 states and 9184 transitions. [2020-10-28 01:01:57,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:01:57,607 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-28 01:01:57,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:01:57,630 INFO L225 Difference]: With dead ends: 5945 [2020-10-28 01:01:57,630 INFO L226 Difference]: Without dead ends: 3575 [2020-10-28 01:01:57,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:01:57,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3575 states. [2020-10-28 01:01:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3575 to 3262. [2020-10-28 01:01:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3262 states. [2020-10-28 01:01:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 5034 transitions. [2020-10-28 01:01:57,994 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 5034 transitions. Word has length 53 [2020-10-28 01:01:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:01:57,994 INFO L481 AbstractCegarLoop]: Abstraction has 3262 states and 5034 transitions. [2020-10-28 01:01:57,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:01:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 5034 transitions. [2020-10-28 01:01:57,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 01:01:57,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:01:57,997 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] [2020-10-28 01:01:57,998 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 01:01:57,998 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:01:57,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:01:57,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1489876136, now seen corresponding path program 1 times [2020-10-28 01:01:57,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:01:57,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1330780438] [2020-10-28 01:01:57,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:01:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:01:58,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:58,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:58,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:58,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:58,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:58,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:01:58,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:01,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:01,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 01:02:01,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 01:02:01,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3174 [2020-10-28 01:02:01,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:01,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:02:01,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-28 01:02:01,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 01:02:01,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:01,461 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:02:01,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:01,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:01,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:01,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:01,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:01,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:01,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 01:02:01,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:01,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:01,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:01,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:01,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:02:01,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1330780438] [2020-10-28 01:02:01,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:01,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:02:01,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993481349] [2020-10-28 01:02:01,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:02:01,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:01,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:02:01,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:02:01,493 INFO L87 Difference]: Start difference. First operand 3262 states and 5034 transitions. Second operand 4 states. [2020-10-28 01:02:01,985 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:02:04,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:04,272 INFO L93 Difference]: Finished difference Result 5905 states and 9429 transitions. [2020-10-28 01:02:04,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:02:04,272 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-28 01:02:04,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:04,311 INFO L225 Difference]: With dead ends: 5905 [2020-10-28 01:02:04,311 INFO L226 Difference]: Without dead ends: 5900 [2020-10-28 01:02:04,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:02:04,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5900 states. [2020-10-28 01:02:04,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5900 to 5373. [2020-10-28 01:02:04,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5373 states. [2020-10-28 01:02:05,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5373 states to 5373 states and 8727 transitions. [2020-10-28 01:02:05,011 INFO L78 Accepts]: Start accepts. Automaton has 5373 states and 8727 transitions. Word has length 62 [2020-10-28 01:02:05,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:05,013 INFO L481 AbstractCegarLoop]: Abstraction has 5373 states and 8727 transitions. [2020-10-28 01:02:05,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:02:05,013 INFO L276 IsEmpty]: Start isEmpty. Operand 5373 states and 8727 transitions. [2020-10-28 01:02:05,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 01:02:05,021 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:05,021 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] [2020-10-28 01:02:05,022 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 01:02:05,022 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:05,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:05,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1698702236, now seen corresponding path program 1 times [2020-10-28 01:02:05,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:05,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433968291] [2020-10-28 01:02:05,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:05,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:05,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:05,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:05,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:05,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:05,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:05,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:06,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:06,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 01:02:06,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 01:02:06,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1852 [2020-10-28 01:02:06,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:06,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:02:06,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 66 [2020-10-28 01:02:06,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 01:02:06,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:07,166 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:02:07,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:07,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:07,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:07,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:07,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:07,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:02:07,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:07,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:07,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:07,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:02:07,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433968291] [2020-10-28 01:02:07,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:07,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 01:02:07,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894835830] [2020-10-28 01:02:07,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 01:02:07,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:07,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 01:02:07,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 01:02:07,191 INFO L87 Difference]: Start difference. First operand 5373 states and 8727 transitions. Second operand 4 states. [2020-10-28 01:02:07,471 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:10,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:10,008 INFO L93 Difference]: Finished difference Result 12429 states and 21266 transitions. [2020-10-28 01:02:10,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 01:02:10,009 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 74 [2020-10-28 01:02:10,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:10,061 INFO L225 Difference]: With dead ends: 12429 [2020-10-28 01:02:10,062 INFO L226 Difference]: Without dead ends: 7069 [2020-10-28 01:02:10,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:02:10,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7069 states. [2020-10-28 01:02:11,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7069 to 6549. [2020-10-28 01:02:11,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6549 states. [2020-10-28 01:02:11,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6549 states to 6549 states and 10733 transitions. [2020-10-28 01:02:11,050 INFO L78 Accepts]: Start accepts. Automaton has 6549 states and 10733 transitions. Word has length 74 [2020-10-28 01:02:11,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:11,051 INFO L481 AbstractCegarLoop]: Abstraction has 6549 states and 10733 transitions. [2020-10-28 01:02:11,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 01:02:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 6549 states and 10733 transitions. [2020-10-28 01:02:11,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 01:02:11,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:11,059 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] [2020-10-28 01:02:11,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 01:02:11,059 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:11,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1812466986, now seen corresponding path program 1 times [2020-10-28 01:02:11,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:11,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907031872] [2020-10-28 01:02:11,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:11,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:11,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:11,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:11,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:13,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:13,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-28 01:02:13,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 01:02:13,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1981 [2020-10-28 01:02:13,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:13,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:02:13,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 01:02:13,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 01:02:13,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:13,339 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:02:13,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:13,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:13,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:13,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:13,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:13,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:13,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 01:02:13,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:13,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:13,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:13,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:13,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:13,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 01:02:13,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:13,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:13,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:13,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 01:02:13,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:13,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 01:02:13,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 01:02:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:13,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 01:02:13,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:13,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:02:13,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907031872] [2020-10-28 01:02:13,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:13,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 01:02:13,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011717647] [2020-10-28 01:02:13,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 01:02:13,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:13,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 01:02:13,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 01:02:13,527 INFO L87 Difference]: Start difference. First operand 6549 states and 10733 transitions. Second operand 8 states. [2020-10-28 01:02:14,069 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:15,049 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:02:16,359 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 01:02:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:19,577 INFO L93 Difference]: Finished difference Result 18610 states and 34029 transitions. [2020-10-28 01:02:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 01:02:19,577 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 78 [2020-10-28 01:02:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:19,659 INFO L225 Difference]: With dead ends: 18610 [2020-10-28 01:02:19,659 INFO L226 Difference]: Without dead ends: 14129 [2020-10-28 01:02:19,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-28 01:02:19,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14129 states. [2020-10-28 01:02:21,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14129 to 12366. [2020-10-28 01:02:21,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12366 states. [2020-10-28 01:02:21,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12366 states to 12366 states and 22512 transitions. [2020-10-28 01:02:21,561 INFO L78 Accepts]: Start accepts. Automaton has 12366 states and 22512 transitions. Word has length 78 [2020-10-28 01:02:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:21,562 INFO L481 AbstractCegarLoop]: Abstraction has 12366 states and 22512 transitions. [2020-10-28 01:02:21,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 01:02:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 12366 states and 22512 transitions. [2020-10-28 01:02:21,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 01:02:21,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:21,572 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] [2020-10-28 01:02:21,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 01:02:21,572 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:21,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:21,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1100708316, now seen corresponding path program 1 times [2020-10-28 01:02:21,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:21,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948172348] [2020-10-28 01:02:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:21,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:21,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:21,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:21,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:21,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:23,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:23,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 01:02:23,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 01:02:23,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2354 [2020-10-28 01:02:23,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:23,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 01:02:23,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 41 [2020-10-28 01:02:23,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 01:02:23,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:24,274 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:02:24,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:24,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:24,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:24,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:24,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:24,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 01:02:24,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:24,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:24,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:24,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:24,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:24,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 01:02:24,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:24,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:24,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:24,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 01:02:24,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:24,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 01:02:24,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:24,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:02:24,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:24,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 01:02:24,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:24,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:02:24,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948172348] [2020-10-28 01:02:24,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:24,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-28 01:02:24,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367257234] [2020-10-28 01:02:24,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 01:02:24,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:24,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 01:02:24,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 01:02:24,472 INFO L87 Difference]: Start difference. First operand 12366 states and 22512 transitions. Second operand 10 states. [2020-10-28 01:02:24,759 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:02:25,275 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 01:02:25,732 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 01:02:27,225 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification that was a NOOP. DAG size: 164 [2020-10-28 01:02:27,592 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-28 01:02:27,808 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-28 01:02:28,728 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:02:29,267 WARN L193 SmtUtils]: Spent 258.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-28 01:02:32,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:32,075 INFO L93 Difference]: Finished difference Result 29665 states and 58225 transitions. [2020-10-28 01:02:32,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 01:02:32,075 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 79 [2020-10-28 01:02:32,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:32,167 INFO L225 Difference]: With dead ends: 29665 [2020-10-28 01:02:32,168 INFO L226 Difference]: Without dead ends: 17326 [2020-10-28 01:02:32,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-28 01:02:32,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17326 states. [2020-10-28 01:02:33,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17326 to 13935. [2020-10-28 01:02:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13935 states. [2020-10-28 01:02:34,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13935 states to 13935 states and 25152 transitions. [2020-10-28 01:02:34,023 INFO L78 Accepts]: Start accepts. Automaton has 13935 states and 25152 transitions. Word has length 79 [2020-10-28 01:02:34,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:34,024 INFO L481 AbstractCegarLoop]: Abstraction has 13935 states and 25152 transitions. [2020-10-28 01:02:34,024 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 01:02:34,024 INFO L276 IsEmpty]: Start isEmpty. Operand 13935 states and 25152 transitions. [2020-10-28 01:02:34,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-28 01:02:34,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:34,047 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 01:02:34,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 01:02:34,047 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:34,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:34,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1891182257, now seen corresponding path program 1 times [2020-10-28 01:02:34,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:34,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157585758] [2020-10-28 01:02:34,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:34,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:34,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:34,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:34,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:34,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:34,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:34,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:34,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:36,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:37,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:39,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:39,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 01:02:39,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 01:02:39,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 01:02:39,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:39,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:02:39,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-28 01:02:39,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 01:02:39,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:39,454 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:02:39,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:39,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:39,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:39,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:39,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:39,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:39,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 01:02:39,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:39,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:39,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:39,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 01:02:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:39,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:39,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:39,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 01:02:39,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:39,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 01:02:39,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:39,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:39,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:39,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:39,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:39,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 01:02:39,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:39,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:39,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:39,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 01:02:39,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:39,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 01:02:39,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:39,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:02:39,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-10-28 01:02:39,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 01:02:39,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:39,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-28 01:02:39,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157585758] [2020-10-28 01:02:39,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:02:39,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 01:02:39,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507226288] [2020-10-28 01:02:39,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 01:02:39,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:39,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 01:02:39,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:02:39,622 INFO L87 Difference]: Start difference. First operand 13935 states and 25152 transitions. Second operand 5 states. [2020-10-28 01:02:40,184 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:02:43,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:43,132 INFO L93 Difference]: Finished difference Result 26896 states and 51508 transitions. [2020-10-28 01:02:43,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 01:02:43,133 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-10-28 01:02:43,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:43,209 INFO L225 Difference]: With dead ends: 26896 [2020-10-28 01:02:43,209 INFO L226 Difference]: Without dead ends: 13130 [2020-10-28 01:02:43,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 01:02:43,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13130 states. [2020-10-28 01:02:44,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13130 to 12159. [2020-10-28 01:02:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12159 states. [2020-10-28 01:02:44,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12159 states to 12159 states and 21232 transitions. [2020-10-28 01:02:44,936 INFO L78 Accepts]: Start accepts. Automaton has 12159 states and 21232 transitions. Word has length 93 [2020-10-28 01:02:44,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:44,936 INFO L481 AbstractCegarLoop]: Abstraction has 12159 states and 21232 transitions. [2020-10-28 01:02:44,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 01:02:44,937 INFO L276 IsEmpty]: Start isEmpty. Operand 12159 states and 21232 transitions. [2020-10-28 01:02:44,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 01:02:44,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:44,944 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, 1, 1] [2020-10-28 01:02:44,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 01:02:44,945 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:44,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1099141878, now seen corresponding path program 1 times [2020-10-28 01:02:44,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:44,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002180815] [2020-10-28 01:02:44,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:44,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:45,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:47,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:47,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:47,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:49,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:49,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-28 01:02:49,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 01:02:49,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 01:02:49,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:49,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:02:49,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-28 01:02:49,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 01:02:49,996 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:50,248 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:02:50,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:02:50,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:50,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:50,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:50,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:02:50,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:50,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 01:02:50,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:50,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:50,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:50,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:50,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:50,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 01:02:50,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:50,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:50,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:02:50,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 01:02:50,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:02:50,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 01:02:50,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:02:50,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:02:50,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:02:50,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:02:50,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:02:50,388 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 01:02:50,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002180815] [2020-10-28 01:02:50,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 01:02:50,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 01:02:50,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477012826] [2020-10-28 01:02:50,389 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 01:02:50,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:02:50,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 01:02:50,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:02:50,391 INFO L87 Difference]: Start difference. First operand 12159 states and 21232 transitions. Second operand 5 states. [2020-10-28 01:02:51,208 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:02:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:02:54,009 INFO L93 Difference]: Finished difference Result 27755 states and 53733 transitions. [2020-10-28 01:02:54,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 01:02:54,010 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 91 [2020-10-28 01:02:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:02:54,091 INFO L225 Difference]: With dead ends: 27755 [2020-10-28 01:02:54,091 INFO L226 Difference]: Without dead ends: 15981 [2020-10-28 01:02:54,256 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 01:02:54,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15981 states. [2020-10-28 01:02:56,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15981 to 15102. [2020-10-28 01:02:56,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15102 states. [2020-10-28 01:02:56,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15102 states to 15102 states and 27101 transitions. [2020-10-28 01:02:56,318 INFO L78 Accepts]: Start accepts. Automaton has 15102 states and 27101 transitions. Word has length 91 [2020-10-28 01:02:56,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:02:56,319 INFO L481 AbstractCegarLoop]: Abstraction has 15102 states and 27101 transitions. [2020-10-28 01:02:56,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 01:02:56,319 INFO L276 IsEmpty]: Start isEmpty. Operand 15102 states and 27101 transitions. [2020-10-28 01:02:56,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-28 01:02:56,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:02:56,327 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 01:02:56,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 01:02:56,327 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:02:56,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:02:56,327 INFO L82 PathProgramCache]: Analyzing trace with hash 246446328, now seen corresponding path program 1 times [2020-10-28 01:02:56,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:02:56,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181183134] [2020-10-28 01:02:56,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:02:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:02:56,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:56,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:56,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:56,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:56,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:56,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:58,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:02:58,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:01,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:01,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-28 01:03:01,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 01:03:01,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 01:03:01,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:01,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:03:01,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 01:03:01,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 01:03:01,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:01,628 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:03:01,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:03:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:01,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:01,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:01,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:03:01,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:01,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 01:03:01,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:01,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:01,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:01,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:01,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:01,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 01:03:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:01,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:01,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:01,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 01:03:01,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:01,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 01:03:01,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:01,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:01,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:01,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:01,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:01,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-10-28 01:03:01,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:01,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:01,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:01,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 01:03:01,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:01,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 01:03:01,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:01,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 01:03:01,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-28 01:03:01,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 01:03:01,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:01,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 01:03:01,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181183134] [2020-10-28 01:03:01,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:03:01,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 01:03:01,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423641549] [2020-10-28 01:03:01,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 01:03:01,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:03:01,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 01:03:01,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 01:03:01,867 INFO L87 Difference]: Start difference. First operand 15102 states and 27101 transitions. Second operand 6 states. [2020-10-28 01:03:02,273 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:03:07,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:03:07,895 INFO L93 Difference]: Finished difference Result 44215 states and 84930 transitions. [2020-10-28 01:03:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 01:03:07,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 94 [2020-10-28 01:03:07,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:03:08,034 INFO L225 Difference]: With dead ends: 44215 [2020-10-28 01:03:08,034 INFO L226 Difference]: Without dead ends: 29082 [2020-10-28 01:03:08,232 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 01:03:08,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29082 states. [2020-10-28 01:03:11,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29082 to 25704. [2020-10-28 01:03:11,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25704 states. [2020-10-28 01:03:12,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25704 states to 25704 states and 47444 transitions. [2020-10-28 01:03:12,337 INFO L78 Accepts]: Start accepts. Automaton has 25704 states and 47444 transitions. Word has length 94 [2020-10-28 01:03:12,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:03:12,338 INFO L481 AbstractCegarLoop]: Abstraction has 25704 states and 47444 transitions. [2020-10-28 01:03:12,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 01:03:12,338 INFO L276 IsEmpty]: Start isEmpty. Operand 25704 states and 47444 transitions. [2020-10-28 01:03:12,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-28 01:03:12,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:03:12,348 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 01:03:12,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 01:03:12,348 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:03:12,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:03:12,349 INFO L82 PathProgramCache]: Analyzing trace with hash 117169373, now seen corresponding path program 1 times [2020-10-28 01:03:12,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:03:12,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530331786] [2020-10-28 01:03:12,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:03:12,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:12,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:12,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:12,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:12,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:12,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:13,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:17,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:17,376 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-28 01:03:17,376 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 01:03:17,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 01:03:17,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:17,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:03:17,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 01:03:17,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 01:03:17,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:17,631 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:03:17,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:03:17,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:17,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:17,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:17,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:03:17,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:17,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 01:03:17,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:17,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:17,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:17,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:17,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:17,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 01:03:17,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:17,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:17,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:17,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 01:03:17,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:17,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 01:03:17,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:17,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:03:17,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:17,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 01:03:17,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:17,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 01:03:17,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:17,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:17,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:17,760 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 01:03:17,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:17,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 01:03:17,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:17,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:17,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 01:03:17,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:17,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:17,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 01:03:17,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530331786] [2020-10-28 01:03:17,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 01:03:17,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 01:03:17,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437443705] [2020-10-28 01:03:17,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 01:03:17,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:03:17,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 01:03:17,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:03:17,778 INFO L87 Difference]: Start difference. First operand 25704 states and 47444 transitions. Second operand 5 states. [2020-10-28 01:03:18,124 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:03:22,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:03:22,749 INFO L93 Difference]: Finished difference Result 48445 states and 94775 transitions. [2020-10-28 01:03:22,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 01:03:22,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 95 [2020-10-28 01:03:22,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:03:22,856 INFO L225 Difference]: With dead ends: 48445 [2020-10-28 01:03:22,856 INFO L226 Difference]: Without dead ends: 21926 [2020-10-28 01:03:23,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-28 01:03:23,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21926 states. [2020-10-28 01:03:26,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21926 to 20292. [2020-10-28 01:03:26,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20292 states. [2020-10-28 01:03:26,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20292 states to 20292 states and 36467 transitions. [2020-10-28 01:03:26,370 INFO L78 Accepts]: Start accepts. Automaton has 20292 states and 36467 transitions. Word has length 95 [2020-10-28 01:03:26,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:03:26,370 INFO L481 AbstractCegarLoop]: Abstraction has 20292 states and 36467 transitions. [2020-10-28 01:03:26,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 01:03:26,370 INFO L276 IsEmpty]: Start isEmpty. Operand 20292 states and 36467 transitions. [2020-10-28 01:03:26,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-28 01:03:26,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:03:26,378 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 01:03:26,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 01:03:26,379 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:03:26,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:03:26,379 INFO L82 PathProgramCache]: Analyzing trace with hash 460048313, now seen corresponding path program 1 times [2020-10-28 01:03:26,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:03:26,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256121653] [2020-10-28 01:03:26,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:03:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:26,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:26,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:26,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:26,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:26,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:26,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:27,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:27,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:27,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:27,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:30,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:30,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:30,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:30,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:31,413 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:31,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-28 01:03:31,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 01:03:31,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 01:03:31,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:31,413 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:03:31,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 99 [2020-10-28 01:03:31,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 01:03:31,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:31,678 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:03:31,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:03:31,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:31,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:31,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:31,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:03:31,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:31,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 01:03:31,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:31,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:31,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:31,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:31,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:31,848 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 01:03:31,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 01:03:31,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:31,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:31,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:31,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 01:03:31,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:31,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 01:03:31,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:31,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:31,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:31,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 01:03:31,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:31,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:31,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:31,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 01:03:31,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:31,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 01:03:31,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:31,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:31,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:31,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:31,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:31,985 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 01:03:31,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256121653] [2020-10-28 01:03:31,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 01:03:31,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 01:03:31,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518290664] [2020-10-28 01:03:31,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 01:03:31,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:03:31,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 01:03:31,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 01:03:31,987 INFO L87 Difference]: Start difference. First operand 20292 states and 36467 transitions. Second operand 6 states. [2020-10-28 01:03:32,810 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:03:36,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:03:36,921 INFO L93 Difference]: Finished difference Result 40779 states and 79422 transitions. [2020-10-28 01:03:36,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 01:03:36,922 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 112 [2020-10-28 01:03:36,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:03:37,024 INFO L225 Difference]: With dead ends: 40779 [2020-10-28 01:03:37,024 INFO L226 Difference]: Without dead ends: 20895 [2020-10-28 01:03:37,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 01:03:37,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20895 states. [2020-10-28 01:03:39,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20895 to 20188. [2020-10-28 01:03:39,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20188 states. [2020-10-28 01:03:40,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20188 states to 20188 states and 35351 transitions. [2020-10-28 01:03:40,124 INFO L78 Accepts]: Start accepts. Automaton has 20188 states and 35351 transitions. Word has length 112 [2020-10-28 01:03:40,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:03:40,124 INFO L481 AbstractCegarLoop]: Abstraction has 20188 states and 35351 transitions. [2020-10-28 01:03:40,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 01:03:40,124 INFO L276 IsEmpty]: Start isEmpty. Operand 20188 states and 35351 transitions. [2020-10-28 01:03:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-28 01:03:40,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:03:40,134 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 01:03:40,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 01:03:40,135 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:03:40,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:03:40,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2090099022, now seen corresponding path program 1 times [2020-10-28 01:03:40,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:03:40,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553027754] [2020-10-28 01:03:40,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:03:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:40,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:40,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:40,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:40,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:40,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:40,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:40,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:40,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:41,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:41,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:41,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:41,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:41,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:41,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:43,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:43,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:45,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:45,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-28 01:03:45,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 01:03:45,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 01:03:45,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:45,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 01:03:45,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-28 01:03:45,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 01:03:45,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:45,500 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:03:45,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:03:45,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:45,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:45,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:45,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:03:45,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:45,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 01:03:45,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:45,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:45,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:45,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:45,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:45,691 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 01:03:45,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 01:03:45,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:45,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:45,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:45,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 01:03:45,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:45,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 01:03:45,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:45,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:45,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:45,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:45,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:45,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 01:03:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:45,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:45,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:45,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 01:03:45,823 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:45,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 01:03:45,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:45,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:45,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:45,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:45,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:45,845 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 01:03:45,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553027754] [2020-10-28 01:03:45,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 01:03:45,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 01:03:45,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853651030] [2020-10-28 01:03:45,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 01:03:45,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:03:45,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 01:03:45,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 01:03:45,847 INFO L87 Difference]: Start difference. First operand 20188 states and 35351 transitions. Second operand 6 states. [2020-10-28 01:03:46,123 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-28 01:03:49,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:03:49,296 INFO L93 Difference]: Finished difference Result 34750 states and 65181 transitions. [2020-10-28 01:03:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 01:03:49,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 114 [2020-10-28 01:03:49,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:03:49,366 INFO L225 Difference]: With dead ends: 34750 [2020-10-28 01:03:49,366 INFO L226 Difference]: Without dead ends: 14967 [2020-10-28 01:03:49,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 01:03:49,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14967 states. [2020-10-28 01:03:51,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14967 to 14446. [2020-10-28 01:03:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14446 states. [2020-10-28 01:03:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14446 states to 14446 states and 24699 transitions. [2020-10-28 01:03:51,386 INFO L78 Accepts]: Start accepts. Automaton has 14446 states and 24699 transitions. Word has length 114 [2020-10-28 01:03:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:03:51,387 INFO L481 AbstractCegarLoop]: Abstraction has 14446 states and 24699 transitions. [2020-10-28 01:03:51,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 01:03:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 14446 states and 24699 transitions. [2020-10-28 01:03:51,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-28 01:03:51,393 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:03:51,393 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 01:03:51,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 01:03:51,393 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:03:51,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:03:51,394 INFO L82 PathProgramCache]: Analyzing trace with hash -232858735, now seen corresponding path program 1 times [2020-10-28 01:03:51,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:03:51,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357270593] [2020-10-28 01:03:51,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:03:51,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:51,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:51,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:51,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:51,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:51,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:51,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:51,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:51,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:52,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:52,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:52,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:55,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:56,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:56,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:56,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 01:03:56,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 01:03:56,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 01:03:56,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:56,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:03:56,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-28 01:03:56,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 01:03:56,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:56,714 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:03:56,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:03:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:56,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:56,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:56,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:03:56,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:56,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 01:03:56,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:56,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:56,898 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 01:03:56,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 01:03:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:56,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:56,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:56,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 01:03:56,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:56,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 01:03:56,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:56,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:56,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:56,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:56,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:57,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 01:03:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:03:57,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:03:57,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:03:57,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 01:03:57,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:03:57,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 01:03:57,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:03:57,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:03:57,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:03:57,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:03:57,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:03:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 01:03:57,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357270593] [2020-10-28 01:03:57,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 01:03:57,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 01:03:57,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581227474] [2020-10-28 01:03:57,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 01:03:57,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:03:57,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 01:03:57,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 01:03:57,046 INFO L87 Difference]: Start difference. First operand 14446 states and 24699 transitions. Second operand 6 states. [2020-10-28 01:03:57,881 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:04:02,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:04:02,448 INFO L93 Difference]: Finished difference Result 34089 states and 65768 transitions. [2020-10-28 01:04:02,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 01:04:02,448 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 117 [2020-10-28 01:04:02,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:04:02,540 INFO L225 Difference]: With dead ends: 34089 [2020-10-28 01:04:02,540 INFO L226 Difference]: Without dead ends: 20051 [2020-10-28 01:04:02,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 01:04:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20051 states. [2020-10-28 01:04:05,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20051 to 19307. [2020-10-28 01:04:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19307 states. [2020-10-28 01:04:05,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19307 states to 19307 states and 34517 transitions. [2020-10-28 01:04:05,178 INFO L78 Accepts]: Start accepts. Automaton has 19307 states and 34517 transitions. Word has length 117 [2020-10-28 01:04:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:04:05,178 INFO L481 AbstractCegarLoop]: Abstraction has 19307 states and 34517 transitions. [2020-10-28 01:04:05,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 01:04:05,178 INFO L276 IsEmpty]: Start isEmpty. Operand 19307 states and 34517 transitions. [2020-10-28 01:04:05,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 01:04:05,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:04:05,189 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 01:04:05,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 01:04:05,189 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:04:05,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:04:05,189 INFO L82 PathProgramCache]: Analyzing trace with hash -1534033314, now seen corresponding path program 1 times [2020-10-28 01:04:05,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:04:05,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988718375] [2020-10-28 01:04:05,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:04:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:05,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:05,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:05,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:05,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:05,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:05,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:05,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:05,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:06,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:06,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:08,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:08,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:08,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:08,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:08,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:08,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:10,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:04:10,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-28 01:04:10,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 01:04:10,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 01:04:10,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:04:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:04:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-28 01:04:10,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 01:04:10,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:04:10,474 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:04:10,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:04:10,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:10,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:10,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:04:10,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:04:10,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:04:10,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 01:04:10,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:04:10,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:04:10,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:04:10,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:04:10,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:04:10,647 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-28 01:04:10,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2020-10-28 01:04:10,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:10,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:10,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:04:10,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 01:04:10,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:04:10,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 01:04:10,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:04:10,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:04:10,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:04:10,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:04:10,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:04:10,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-10-28 01:04:10,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:10,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:10,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:04:10,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-28 01:04:10,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:04:10,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 01:04:10,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:04:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:04:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:04:10,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:04:10,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:04:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 01:04:10,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988718375] [2020-10-28 01:04:10,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 01:04:10,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 01:04:10,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968250742] [2020-10-28 01:04:10,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 01:04:10,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:04:10,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 01:04:10,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 01:04:10,796 INFO L87 Difference]: Start difference. First operand 19307 states and 34517 transitions. Second operand 6 states. [2020-10-28 01:04:11,434 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:04:15,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:04:15,595 INFO L93 Difference]: Finished difference Result 43154 states and 85576 transitions. [2020-10-28 01:04:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 01:04:15,595 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 119 [2020-10-28 01:04:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:04:15,714 INFO L225 Difference]: With dead ends: 43154 [2020-10-28 01:04:15,714 INFO L226 Difference]: Without dead ends: 24294 [2020-10-28 01:04:16,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 01:04:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24294 states. [2020-10-28 01:04:19,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24294 to 23523. [2020-10-28 01:04:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23523 states. [2020-10-28 01:04:19,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23523 states to 23523 states and 43181 transitions. [2020-10-28 01:04:19,484 INFO L78 Accepts]: Start accepts. Automaton has 23523 states and 43181 transitions. Word has length 119 [2020-10-28 01:04:19,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:04:19,484 INFO L481 AbstractCegarLoop]: Abstraction has 23523 states and 43181 transitions. [2020-10-28 01:04:19,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 01:04:19,484 INFO L276 IsEmpty]: Start isEmpty. Operand 23523 states and 43181 transitions. [2020-10-28 01:04:19,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-28 01:04:19,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:04:19,503 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 01:04:19,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 01:04:19,504 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:04:19,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:04:19,504 INFO L82 PathProgramCache]: Analyzing trace with hash 993650710, now seen corresponding path program 1 times [2020-10-28 01:04:19,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:04:19,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1389326907] [2020-10-28 01:04:19,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:04:19,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:19,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:19,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:19,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:20,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:24,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:04:24,531 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-28 01:04:24,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 01:04:24,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 01:04:24,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:04:24,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:04:24,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 01:04:24,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 01:04:24,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:04:24,805 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-28 01:04:24,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 01:04:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:24,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:24,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:04:24,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 01:04:24,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:04:24,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 01:04:24,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:04:24,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 01:04:24,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 01:04:24,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 01:04:24,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:04:24,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-10-28 01:04:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:24,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:24,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 01:04:24,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 01:04:24,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 01:04:24,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 01:04:24,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 01:04:24,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 01:04:24,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 01:04:24,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 01:04:24,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 01:04:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 01:04:24,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1389326907] [2020-10-28 01:04:24,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 01:04:24,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 01:04:24,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368574061] [2020-10-28 01:04:24,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 01:04:24,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 01:04:24,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 01:04:24,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 01:04:24,958 INFO L87 Difference]: Start difference. First operand 23523 states and 43181 transitions. Second operand 5 states. [2020-10-28 01:04:25,218 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 162 [2020-10-28 01:04:28,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 01:04:28,813 INFO L93 Difference]: Finished difference Result 42657 states and 84036 transitions. [2020-10-28 01:04:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 01:04:28,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 120 [2020-10-28 01:04:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 01:04:28,933 INFO L225 Difference]: With dead ends: 42657 [2020-10-28 01:04:28,934 INFO L226 Difference]: Without dead ends: 18758 [2020-10-28 01:04:29,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-28 01:04:29,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18758 states. [2020-10-28 01:04:31,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18758 to 13903. [2020-10-28 01:04:31,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13903 states. [2020-10-28 01:04:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13903 states to 13903 states and 23946 transitions. [2020-10-28 01:04:31,554 INFO L78 Accepts]: Start accepts. Automaton has 13903 states and 23946 transitions. Word has length 120 [2020-10-28 01:04:31,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 01:04:31,554 INFO L481 AbstractCegarLoop]: Abstraction has 13903 states and 23946 transitions. [2020-10-28 01:04:31,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 01:04:31,554 INFO L276 IsEmpty]: Start isEmpty. Operand 13903 states and 23946 transitions. [2020-10-28 01:04:31,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-28 01:04:31,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 01:04:31,569 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 01:04:31,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 01:04:31,569 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 01:04:31,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 01:04:31,570 INFO L82 PathProgramCache]: Analyzing trace with hash 379694586, now seen corresponding path program 1 times [2020-10-28 01:04:31,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 01:04:31,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595791181] [2020-10-28 01:04:31,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 01:04:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 01:04:31,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:31,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:31,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:31,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:31,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:31,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:32,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:32,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:32,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:32,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:32,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:32,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:32,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 01:04:32,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking...