/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 05:33:56,850 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 05:33:56,854 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 05:33:56,912 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 05:33:56,913 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 05:33:56,921 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 05:33:56,923 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 05:33:56,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 05:33:56,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 05:33:56,940 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 05:33:56,941 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 05:33:56,943 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 05:33:56,943 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 05:33:56,947 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 05:33:56,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 05:33:56,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 05:33:56,954 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 05:33:56,958 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 05:33:56,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 05:33:56,976 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 05:33:56,978 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 05:33:56,980 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 05:33:56,981 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 05:33:56,984 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 05:33:56,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 05:33:56,994 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 05:33:56,995 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 05:33:56,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 05:33:56,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 05:33:56,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 05:33:56,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 05:33:57,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 05:33:57,003 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 05:33:57,003 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 05:33:57,005 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 05:33:57,005 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 05:33:57,006 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 05:33:57,006 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 05:33:57,006 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 05:33:57,007 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 05:33:57,008 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 05:33:57,015 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 05:33:57,088 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 05:33:57,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 05:33:57,104 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 05:33:57,105 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 05:33:57,105 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 05:33:57,105 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 05:33:57,106 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 05:33:57,106 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 05:33:57,106 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 05:33:57,106 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 05:33:57,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 05:33:57,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 05:33:57,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 05:33:57,111 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 05:33:57,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 05:33:57,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 05:33:57,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 05:33:57,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 05:33:57,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 05:33:57,115 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 05:33:57,115 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 05:33:57,116 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:33:57,116 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 05:33:57,116 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 05:33:57,116 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 05:33:57,116 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 05:33:57,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 05:33:57,117 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 05:33:57,117 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 05:33:57,117 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 05:33:57,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 05:33:57,589 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 05:33:57,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 05:33:57,593 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 05:33:57,594 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 05:33:57,596 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:33:57,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cfa3ddf5/d0f46d262f834749801e3f3d4788720d/FLAGcaab8f262 [2020-10-27 05:33:58,325 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 05:33:58,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:33:58,350 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cfa3ddf5/d0f46d262f834749801e3f3d4788720d/FLAGcaab8f262 [2020-10-27 05:33:58,684 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8cfa3ddf5/d0f46d262f834749801e3f3d4788720d [2020-10-27 05:33:58,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 05:33:58,695 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 05:33:58,699 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 05:33:58,699 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 05:33:58,703 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 05:33:58,704 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:33:58" (1/1) ... [2020-10-27 05:33:58,709 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d814d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:58, skipping insertion in model container [2020-10-27 05:33:58,709 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 05:33:58" (1/1) ... [2020-10-27 05:33:58,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 05:33:58,784 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 05:33:58,999 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:33:59,013 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 05:33:59,074 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 05:33:59,100 INFO L208 MainTranslator]: Completed translation [2020-10-27 05:33:59,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:59 WrapperNode [2020-10-27 05:33:59,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 05:33:59,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 05:33:59,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 05:33:59,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 05:33:59,128 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:59" (1/1) ... [2020-10-27 05:33:59,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:59" (1/1) ... [2020-10-27 05:33:59,166 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:59" (1/1) ... [2020-10-27 05:33:59,166 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:59" (1/1) ... [2020-10-27 05:33:59,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:59" (1/1) ... [2020-10-27 05:33:59,206 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:59" (1/1) ... [2020-10-27 05:33:59,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:59" (1/1) ... [2020-10-27 05:33:59,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 05:33:59,224 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 05:33:59,224 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 05:33:59,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 05:33:59,226 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:59" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 05:33:59,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 05:33:59,317 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 05:33:59,318 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 05:33:59,318 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 05:33:59,319 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 05:33:59,319 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 05:33:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 05:33:59,320 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 05:33:59,324 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 05:33:59,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-27 05:33:59,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-27 05:33:59,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-27 05:33:59,326 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-27 05:33:59,326 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 05:33:59,326 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-27 05:33:59,326 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-27 05:33:59,326 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-27 05:33:59,326 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-27 05:33:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-27 05:33:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-27 05:33:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-27 05:33:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 05:33:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 05:33:59,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 05:33:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 05:33:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 05:33:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 05:33:59,328 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 05:34:00,043 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 05:34:00,044 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 05:34:00,046 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:34:00 BoogieIcfgContainer [2020-10-27 05:34:00,046 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 05:34:00,048 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 05:34:00,048 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 05:34:00,051 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 05:34:00,051 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 05:33:58" (1/3) ... [2020-10-27 05:34:00,052 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333ff407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:34:00, skipping insertion in model container [2020-10-27 05:34:00,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 05:33:59" (2/3) ... [2020-10-27 05:34:00,053 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@333ff407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 05:34:00, skipping insertion in model container [2020-10-27 05:34:00,053 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 05:34:00" (3/3) ... [2020-10-27 05:34:00,055 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-27 05:34:00,069 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 05:34:00,075 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 05:34:00,091 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 05:34:00,167 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 05:34:00,168 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 05:34:00,168 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 05:34:00,168 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 05:34:00,168 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 05:34:00,169 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 05:34:00,169 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 05:34:00,169 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 05:34:00,212 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states. [2020-10-27 05:34:00,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 05:34:00,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:00,227 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] [2020-10-27 05:34:00,228 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:00,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:00,237 INFO L82 PathProgramCache]: Analyzing trace with hash -734565587, now seen corresponding path program 1 times [2020-10-27 05:34:00,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:00,249 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1751468895] [2020-10-27 05:34:00,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:00,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:00,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:00,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:00,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:02,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:02,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 05:34:02,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:34:02,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1710 [2020-10-27 05:34:02,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:02,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:34:02,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 05:34:02,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 05:34:02,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 05:34:02,544 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:34:02,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:02,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:02,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:02,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:02,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:02,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 05:34:02,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:02,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:02,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:02,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:02,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:02,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:02,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1751468895] [2020-10-27 05:34:02,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:02,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:34:02,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498166382] [2020-10-27 05:34:02,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:34:02,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:02,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:34:02,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:34:02,627 INFO L87 Difference]: Start difference. First operand 96 states. Second operand 6 states. [2020-10-27 05:34:02,873 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:34:03,568 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 126 [2020-10-27 05:34:03,712 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:34:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:03,750 INFO L93 Difference]: Finished difference Result 372 states and 579 transitions. [2020-10-27 05:34:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:34:03,752 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-27 05:34:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:03,770 INFO L225 Difference]: With dead ends: 372 [2020-10-27 05:34:03,770 INFO L226 Difference]: Without dead ends: 284 [2020-10-27 05:34:03,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:34:03,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-27 05:34:03,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 151. [2020-10-27 05:34:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 05:34:03,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 224 transitions. [2020-10-27 05:34:03,885 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 224 transitions. Word has length 43 [2020-10-27 05:34:03,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:03,886 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 224 transitions. [2020-10-27 05:34:03,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:34:03,887 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 224 transitions. [2020-10-27 05:34:03,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 05:34:03,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:03,892 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] [2020-10-27 05:34:03,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 05:34:03,893 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:03,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:03,894 INFO L82 PathProgramCache]: Analyzing trace with hash -1871397161, now seen corresponding path program 1 times [2020-10-27 05:34:03,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:03,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [87329363] [2020-10-27 05:34:03,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:03,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:04,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:04,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:04,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:04,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 05:34:04,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:34:04,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-10-27 05:34:04,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:04,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:04,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-27 05:34:04,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 05:34:04,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:04,740 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:34:04,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:04,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:04,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:04,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:04,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:04,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:34:04,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:04,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:04,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:04,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:04,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:04,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [87329363] [2020-10-27 05:34:04,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:04,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:34:04,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735673062] [2020-10-27 05:34:04,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:34:04,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:04,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:34:04,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:34:04,777 INFO L87 Difference]: Start difference. First operand 151 states and 224 transitions. Second operand 4 states. [2020-10-27 05:34:05,007 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:34:05,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:05,570 INFO L93 Difference]: Finished difference Result 373 states and 572 transitions. [2020-10-27 05:34:05,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:34:05,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 44 [2020-10-27 05:34:05,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:05,578 INFO L225 Difference]: With dead ends: 373 [2020-10-27 05:34:05,578 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 05:34:05,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:34:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 05:34:05,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-27 05:34:05,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-27 05:34:05,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 368 transitions. [2020-10-27 05:34:05,625 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 368 transitions. Word has length 44 [2020-10-27 05:34:05,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:05,626 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 368 transitions. [2020-10-27 05:34:05,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:34:05,627 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 368 transitions. [2020-10-27 05:34:05,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 05:34:05,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:05,629 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] [2020-10-27 05:34:05,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 05:34:05,630 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:05,631 INFO L82 PathProgramCache]: Analyzing trace with hash -2095840313, now seen corresponding path program 1 times [2020-10-27 05:34:05,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:05,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396605778] [2020-10-27 05:34:05,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:05,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:05,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:05,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:05,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:05,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 05:34:05,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:34:05,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 314 [2020-10-27 05:34:05,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:05,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:05,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-27 05:34:05,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 05:34:05,986 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:34:06,187 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:34:06,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:06,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:06,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:06,206 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:06,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:06,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:06,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 05:34:06,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:06,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:06,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:06,208 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:06,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:06,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:06,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396605778] [2020-10-27 05:34:06,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:06,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:34:06,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397725445] [2020-10-27 05:34:06,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:34:06,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:06,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:34:06,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:34:06,222 INFO L87 Difference]: Start difference. First operand 243 states and 368 transitions. Second operand 4 states. [2020-10-27 05:34:06,413 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:34:06,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:06,823 INFO L93 Difference]: Finished difference Result 617 states and 952 transitions. [2020-10-27 05:34:06,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:34:06,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-27 05:34:06,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:06,828 INFO L225 Difference]: With dead ends: 617 [2020-10-27 05:34:06,828 INFO L226 Difference]: Without dead ends: 398 [2020-10-27 05:34:06,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:34:06,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2020-10-27 05:34:06,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 395. [2020-10-27 05:34:06,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 395 states. [2020-10-27 05:34:06,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 602 transitions. [2020-10-27 05:34:06,872 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 602 transitions. Word has length 45 [2020-10-27 05:34:06,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:06,872 INFO L481 AbstractCegarLoop]: Abstraction has 395 states and 602 transitions. [2020-10-27 05:34:06,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:34:06,873 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 602 transitions. [2020-10-27 05:34:06,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 05:34:06,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:06,875 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] [2020-10-27 05:34:06,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 05:34:06,875 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:06,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:06,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1127369728, now seen corresponding path program 1 times [2020-10-27 05:34:06,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:06,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155294933] [2020-10-27 05:34:06,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:06,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:06,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:07,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:07,270 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:07,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 05:34:07,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:34:07,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 340 [2020-10-27 05:34:07,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:07,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:34:07,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 05:34:07,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 05:34:07,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:07,488 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:34:07,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:07,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:07,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:07,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:07,507 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:07,507 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:34:07,507 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:07,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:07,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:07,508 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:07,508 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 05:34:07,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:07,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155294933] [2020-10-27 05:34:07,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:07,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 05:34:07,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706270687] [2020-10-27 05:34:07,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:34:07,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:07,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:34:07,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:34:07,569 INFO L87 Difference]: Start difference. First operand 395 states and 602 transitions. Second operand 6 states. [2020-10-27 05:34:08,115 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:34:08,312 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:34:08,488 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:34:08,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:08,894 INFO L93 Difference]: Finished difference Result 1356 states and 2088 transitions. [2020-10-27 05:34:08,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 05:34:08,896 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-27 05:34:08,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:08,904 INFO L225 Difference]: With dead ends: 1356 [2020-10-27 05:34:08,905 INFO L226 Difference]: Without dead ends: 985 [2020-10-27 05:34:08,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:34:08,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2020-10-27 05:34:09,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 979. [2020-10-27 05:34:09,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 979 states. [2020-10-27 05:34:09,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 979 states to 979 states and 1498 transitions. [2020-10-27 05:34:09,017 INFO L78 Accepts]: Start accepts. Automaton has 979 states and 1498 transitions. Word has length 46 [2020-10-27 05:34:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:09,018 INFO L481 AbstractCegarLoop]: Abstraction has 979 states and 1498 transitions. [2020-10-27 05:34:09,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:34:09,018 INFO L276 IsEmpty]: Start isEmpty. Operand 979 states and 1498 transitions. [2020-10-27 05:34:09,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 05:34:09,029 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:09,029 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] [2020-10-27 05:34:09,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 05:34:09,029 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:09,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:09,030 INFO L82 PathProgramCache]: Analyzing trace with hash -739400431, now seen corresponding path program 1 times [2020-10-27 05:34:09,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:09,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1575453488] [2020-10-27 05:34:09,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:09,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:09,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:09,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:09,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:09,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 05:34:09,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:34:09,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 275 [2020-10-27 05:34:09,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:09,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:09,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-27 05:34:09,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 05:34:09,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:09,527 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:34:09,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:09,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:09,543 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:09,543 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:09,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:09,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:34:09,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:09,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:09,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:09,544 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:09,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:09,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1575453488] [2020-10-27 05:34:09,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:09,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:34:09,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416650473] [2020-10-27 05:34:09,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:34:09,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:09,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:34:09,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:34:09,561 INFO L87 Difference]: Start difference. First operand 979 states and 1498 transitions. Second operand 4 states. [2020-10-27 05:34:09,757 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:34:10,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:10,366 INFO L93 Difference]: Finished difference Result 2497 states and 3814 transitions. [2020-10-27 05:34:10,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:34:10,367 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 47 [2020-10-27 05:34:10,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:10,376 INFO L225 Difference]: With dead ends: 2497 [2020-10-27 05:34:10,376 INFO L226 Difference]: Without dead ends: 1542 [2020-10-27 05:34:10,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:34:10,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2020-10-27 05:34:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1539. [2020-10-27 05:34:10,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1539 states. [2020-10-27 05:34:10,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 2314 transitions. [2020-10-27 05:34:10,485 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 2314 transitions. Word has length 47 [2020-10-27 05:34:10,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:10,485 INFO L481 AbstractCegarLoop]: Abstraction has 1539 states and 2314 transitions. [2020-10-27 05:34:10,485 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:34:10,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 2314 transitions. [2020-10-27 05:34:10,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 05:34:10,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:10,487 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] [2020-10-27 05:34:10,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 05:34:10,487 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:10,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:10,488 INFO L82 PathProgramCache]: Analyzing trace with hash 643385751, now seen corresponding path program 1 times [2020-10-27 05:34:10,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:10,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619445033] [2020-10-27 05:34:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:10,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:10,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:10,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:10,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:10,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 05:34:10,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:34:10,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-27 05:34:10,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:10,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:34:10,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:10,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 05:34:10,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:11,163 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:34:11,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:11,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:11,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:11,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:11,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:11,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-27 05:34:11,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:11,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:11,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:11,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:11,204 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:11,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619445033] [2020-10-27 05:34:11,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:11,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:34:11,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121203800] [2020-10-27 05:34:11,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:34:11,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:11,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:34:11,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:34:11,228 INFO L87 Difference]: Start difference. First operand 1539 states and 2314 transitions. Second operand 6 states. [2020-10-27 05:34:11,414 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:34:12,140 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:34:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:12,300 INFO L93 Difference]: Finished difference Result 4529 states and 6814 transitions. [2020-10-27 05:34:12,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:34:12,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 48 [2020-10-27 05:34:12,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:12,317 INFO L225 Difference]: With dead ends: 4529 [2020-10-27 05:34:12,317 INFO L226 Difference]: Without dead ends: 3014 [2020-10-27 05:34:12,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:34:12,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2020-10-27 05:34:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 3011. [2020-10-27 05:34:12,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3011 states. [2020-10-27 05:34:12,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3011 states to 3011 states and 4482 transitions. [2020-10-27 05:34:12,538 INFO L78 Accepts]: Start accepts. Automaton has 3011 states and 4482 transitions. Word has length 48 [2020-10-27 05:34:12,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:12,539 INFO L481 AbstractCegarLoop]: Abstraction has 3011 states and 4482 transitions. [2020-10-27 05:34:12,539 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:34:12,539 INFO L276 IsEmpty]: Start isEmpty. Operand 3011 states and 4482 transitions. [2020-10-27 05:34:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 05:34:12,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:12,540 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] [2020-10-27 05:34:12,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 05:34:12,540 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:12,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:12,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1166417682, now seen corresponding path program 1 times [2020-10-27 05:34:12,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:12,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165645232] [2020-10-27 05:34:12,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:12,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:12,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:12,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 05:34:12,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:12,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-27 05:34:12,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:12,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 05:34:12,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-27 05:34:12,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 05:34:12,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:12,925 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:34:12,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:12,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:12,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:12,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:12,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:12,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:34:12,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:12,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:12,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:12,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:12,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:12,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165645232] [2020-10-27 05:34:12,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:12,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:34:12,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53565252] [2020-10-27 05:34:12,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 05:34:12,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:12,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 05:34:12,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:34:12,955 INFO L87 Difference]: Start difference. First operand 3011 states and 4482 transitions. Second operand 5 states. [2020-10-27 05:34:13,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:13,840 INFO L93 Difference]: Finished difference Result 6190 states and 9132 transitions. [2020-10-27 05:34:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 05:34:13,841 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 48 [2020-10-27 05:34:13,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:13,876 INFO L225 Difference]: With dead ends: 6190 [2020-10-27 05:34:13,876 INFO L226 Difference]: Without dead ends: 6187 [2020-10-27 05:34:13,880 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:34:13,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6187 states. [2020-10-27 05:34:14,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6187 to 3203. [2020-10-27 05:34:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3203 states. [2020-10-27 05:34:14,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3203 states to 3203 states and 4674 transitions. [2020-10-27 05:34:14,216 INFO L78 Accepts]: Start accepts. Automaton has 3203 states and 4674 transitions. Word has length 48 [2020-10-27 05:34:14,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:14,217 INFO L481 AbstractCegarLoop]: Abstraction has 3203 states and 4674 transitions. [2020-10-27 05:34:14,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 05:34:14,217 INFO L276 IsEmpty]: Start isEmpty. Operand 3203 states and 4674 transitions. [2020-10-27 05:34:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 05:34:14,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:14,219 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] [2020-10-27 05:34:14,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 05:34:14,219 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:14,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:14,220 INFO L82 PathProgramCache]: Analyzing trace with hash 2097236675, now seen corresponding path program 1 times [2020-10-27 05:34:14,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:14,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404355399] [2020-10-27 05:34:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:14,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:14,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:14,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 05:34:14,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:14,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-27 05:34:14,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:14,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:14,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-27 05:34:14,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 05:34:14,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:14,576 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:34:14,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:14,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:14,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:14,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:14,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:14,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 05:34:14,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:14,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:14,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:14,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:14,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:14,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:14,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404355399] [2020-10-27 05:34:14,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:14,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 05:34:14,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050689811] [2020-10-27 05:34:14,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 05:34:14,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:14,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 05:34:14,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 05:34:14,612 INFO L87 Difference]: Start difference. First operand 3203 states and 4674 transitions. Second operand 4 states. [2020-10-27 05:34:14,787 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:34:15,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:15,458 INFO L93 Difference]: Finished difference Result 7095 states and 10340 transitions. [2020-10-27 05:34:15,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 05:34:15,459 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 49 [2020-10-27 05:34:15,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:15,480 INFO L225 Difference]: With dead ends: 7095 [2020-10-27 05:34:15,480 INFO L226 Difference]: Without dead ends: 3916 [2020-10-27 05:34:15,490 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 05:34:15,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3916 states. [2020-10-27 05:34:15,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3916 to 3893. [2020-10-27 05:34:15,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3893 states. [2020-10-27 05:34:15,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 5628 transitions. [2020-10-27 05:34:15,887 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 5628 transitions. Word has length 49 [2020-10-27 05:34:15,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:15,887 INFO L481 AbstractCegarLoop]: Abstraction has 3893 states and 5628 transitions. [2020-10-27 05:34:15,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 05:34:15,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 5628 transitions. [2020-10-27 05:34:15,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:34:15,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:15,891 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] [2020-10-27 05:34:15,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 05:34:15,892 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:15,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:15,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1288443405, now seen corresponding path program 1 times [2020-10-27 05:34:15,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:15,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323547906] [2020-10-27 05:34:15,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:15,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:15,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:15,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:16,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:18,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:18,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:34:18,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:34:18,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2248 [2020-10-27 05:34:18,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:18,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:34:18,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:18,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:34:18,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:18,522 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:34:18,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:18,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:18,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:18,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:18,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:18,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 05:34:18,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:18,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:18,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:18,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:18,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:18,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323547906] [2020-10-27 05:34:18,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:34:18,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:34:18,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168841703] [2020-10-27 05:34:18,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:34:18,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:18,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:34:18,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:34:18,596 INFO L87 Difference]: Start difference. First operand 3893 states and 5628 transitions. Second operand 11 states. [2020-10-27 05:34:18,851 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-27 05:34:21,556 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:34:21,860 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:34:22,106 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:34:23,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:23,915 INFO L93 Difference]: Finished difference Result 21813 states and 31107 transitions. [2020-10-27 05:34:23,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 05:34:23,915 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-27 05:34:23,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:23,992 INFO L225 Difference]: With dead ends: 21813 [2020-10-27 05:34:23,992 INFO L226 Difference]: Without dead ends: 17946 [2020-10-27 05:34:24,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 05:34:24,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17946 states. [2020-10-27 05:34:24,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17946 to 6755. [2020-10-27 05:34:24,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6755 states. [2020-10-27 05:34:24,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 9687 transitions. [2020-10-27 05:34:24,938 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 9687 transitions. Word has length 68 [2020-10-27 05:34:24,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:24,939 INFO L481 AbstractCegarLoop]: Abstraction has 6755 states and 9687 transitions. [2020-10-27 05:34:24,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:34:24,939 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 9687 transitions. [2020-10-27 05:34:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:34:24,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:24,943 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-27 05:34:24,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 05:34:24,943 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:24,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1643761902, now seen corresponding path program 1 times [2020-10-27 05:34:24,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:24,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168840987] [2020-10-27 05:34:24,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:24,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:25,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:25,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:25,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:25,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:26,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:29,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:29,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:29,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:34:29,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 05:34:29,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 05:34:29,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:29,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:34:29,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:34:29,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:34:29,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:30,369 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:34:30,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:30,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:30,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:30,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:30,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:30,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 05:34:30,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:30,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:34:30,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:30,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:34:30,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:30,419 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:30,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168840987] [2020-10-27 05:34:30,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:34:30,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:34:30,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584386336] [2020-10-27 05:34:30,421 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:34:30,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:30,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:34:30,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:34:30,422 INFO L87 Difference]: Start difference. First operand 6755 states and 9687 transitions. Second operand 10 states. [2020-10-27 05:34:30,630 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:34:32,867 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:34:33,205 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:34:35,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:35,294 INFO L93 Difference]: Finished difference Result 25355 states and 36369 transitions. [2020-10-27 05:34:35,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 05:34:35,295 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-27 05:34:35,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:35,343 INFO L225 Difference]: With dead ends: 25355 [2020-10-27 05:34:35,344 INFO L226 Difference]: Without dead ends: 20516 [2020-10-27 05:34:35,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2020-10-27 05:34:35,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20516 states. [2020-10-27 05:34:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20516 to 8319. [2020-10-27 05:34:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8319 states. [2020-10-27 05:34:36,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8319 states to 8319 states and 11951 transitions. [2020-10-27 05:34:36,663 INFO L78 Accepts]: Start accepts. Automaton has 8319 states and 11951 transitions. Word has length 68 [2020-10-27 05:34:36,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:36,664 INFO L481 AbstractCegarLoop]: Abstraction has 8319 states and 11951 transitions. [2020-10-27 05:34:36,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:34:36,664 INFO L276 IsEmpty]: Start isEmpty. Operand 8319 states and 11951 transitions. [2020-10-27 05:34:36,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:34:36,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:36,668 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] [2020-10-27 05:34:36,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 05:34:36,668 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:36,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:36,669 INFO L82 PathProgramCache]: Analyzing trace with hash 845698058, now seen corresponding path program 1 times [2020-10-27 05:34:36,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:36,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357290987] [2020-10-27 05:34:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:36,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:36,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:36,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:37,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:37,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:34:37,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 05:34:37,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-27 05:34:37,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:37,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 05:34:37,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:37,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 05:34:37,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:37,345 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:34:37,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:37,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:37,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:37,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:37,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:37,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-27 05:34:37,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:37,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:37,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 05:34:37,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357290987] [2020-10-27 05:34:37,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 05:34:37,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 05:34:37,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944008638] [2020-10-27 05:34:37,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 05:34:37,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:37,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 05:34:37,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-27 05:34:37,400 INFO L87 Difference]: Start difference. First operand 8319 states and 11951 transitions. Second operand 6 states. [2020-10-27 05:34:37,602 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:34:38,414 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:34:39,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:34:39,805 INFO L93 Difference]: Finished difference Result 24729 states and 35449 transitions. [2020-10-27 05:34:39,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 05:34:39,806 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-27 05:34:39,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:34:39,849 INFO L225 Difference]: With dead ends: 24729 [2020-10-27 05:34:39,849 INFO L226 Difference]: Without dead ends: 16436 [2020-10-27 05:34:39,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-10-27 05:34:39,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16436 states. [2020-10-27 05:34:41,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16436 to 16433. [2020-10-27 05:34:41,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16433 states. [2020-10-27 05:34:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16433 states to 16433 states and 23346 transitions. [2020-10-27 05:34:41,947 INFO L78 Accepts]: Start accepts. Automaton has 16433 states and 23346 transitions. Word has length 68 [2020-10-27 05:34:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:34:41,947 INFO L481 AbstractCegarLoop]: Abstraction has 16433 states and 23346 transitions. [2020-10-27 05:34:41,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 05:34:41,948 INFO L276 IsEmpty]: Start isEmpty. Operand 16433 states and 23346 transitions. [2020-10-27 05:34:41,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:34:41,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:34:41,952 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] [2020-10-27 05:34:41,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 05:34:41,953 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:34:41,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:34:41,953 INFO L82 PathProgramCache]: Analyzing trace with hash 342653231, now seen corresponding path program 1 times [2020-10-27 05:34:41,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:34:41,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286303689] [2020-10-27 05:34:41,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:34:41,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:41,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:42,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:42,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:43,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:43,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:34:43,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:34:43,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1377 [2020-10-27 05:34:43,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:43,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:34:43,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:34:43,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 05:34:43,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:34:43,682 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:34:43,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:34:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:34:43,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:34:43,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:34:43,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:34:43,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:34:43,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-27 05:34:43,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:34:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:34:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:34:43,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:34:43,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 05:34:43,746 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:34:43,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286303689] [2020-10-27 05:34:43,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:34:43,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:34:43,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032501805] [2020-10-27 05:34:43,747 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:34:43,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:34:43,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:34:43,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:34:43,748 INFO L87 Difference]: Start difference. First operand 16433 states and 23346 transitions. Second operand 11 states. [2020-10-27 05:34:44,056 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:34:46,540 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:34:46,755 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:34:47,043 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:34:47,322 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:34:52,873 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:34:53,423 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 134 [2020-10-27 05:35:03,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:03,536 INFO L93 Difference]: Finished difference Result 133486 states and 187467 transitions. [2020-10-27 05:35:03,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 05:35:03,537 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-27 05:35:03,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:03,904 INFO L225 Difference]: With dead ends: 133486 [2020-10-27 05:35:03,904 INFO L226 Difference]: Without dead ends: 120855 [2020-10-27 05:35:03,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1212 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=709, Invalid=2951, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 05:35:04,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120855 states. [2020-10-27 05:35:10,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120855 to 42731. [2020-10-27 05:35:10,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42731 states. [2020-10-27 05:35:10,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42731 states to 42731 states and 60563 transitions. [2020-10-27 05:35:10,704 INFO L78 Accepts]: Start accepts. Automaton has 42731 states and 60563 transitions. Word has length 68 [2020-10-27 05:35:10,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:10,705 INFO L481 AbstractCegarLoop]: Abstraction has 42731 states and 60563 transitions. [2020-10-27 05:35:10,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:35:10,705 INFO L276 IsEmpty]: Start isEmpty. Operand 42731 states and 60563 transitions. [2020-10-27 05:35:10,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:35:10,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:10,712 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] [2020-10-27 05:35:10,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 05:35:10,712 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:10,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:10,713 INFO L82 PathProgramCache]: Analyzing trace with hash 1067849665, now seen corresponding path program 1 times [2020-10-27 05:35:10,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:10,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962018674] [2020-10-27 05:35:10,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:10,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:10,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:10,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:10,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:11,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:13,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:13,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:35:13,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 05:35:13,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2424 [2020-10-27 05:35:13,169 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:13,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 05:35:13,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 05:35:13,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 05:35:13,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:13,616 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:35:13,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:13,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:13,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:13,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:13,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:13,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:13,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 05:35:13,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:13,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 05:35:13,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:13,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 05:35:13,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:13,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962018674] [2020-10-27 05:35:13,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:35:13,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:35:13,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018861149] [2020-10-27 05:35:13,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 05:35:13,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:13,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 05:35:13,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 05:35:13,667 INFO L87 Difference]: Start difference. First operand 42731 states and 60563 transitions. Second operand 10 states. [2020-10-27 05:35:13,882 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:35:16,249 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification that was a NOOP. DAG size: 132 [2020-10-27 05:35:16,461 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:35:16,842 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:35:33,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:35:33,997 INFO L93 Difference]: Finished difference Result 168113 states and 237422 transitions. [2020-10-27 05:35:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 05:35:33,998 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-10-27 05:35:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:35:34,242 INFO L225 Difference]: With dead ends: 168113 [2020-10-27 05:35:34,243 INFO L226 Difference]: Without dead ends: 125408 [2020-10-27 05:35:34,656 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=283, Invalid=907, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 05:35:34,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125408 states. [2020-10-27 05:35:44,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125408 to 74685. [2020-10-27 05:35:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74685 states. [2020-10-27 05:35:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74685 states to 74685 states and 105672 transitions. [2020-10-27 05:35:45,040 INFO L78 Accepts]: Start accepts. Automaton has 74685 states and 105672 transitions. Word has length 68 [2020-10-27 05:35:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:35:45,041 INFO L481 AbstractCegarLoop]: Abstraction has 74685 states and 105672 transitions. [2020-10-27 05:35:45,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 05:35:45,041 INFO L276 IsEmpty]: Start isEmpty. Operand 74685 states and 105672 transitions. [2020-10-27 05:35:45,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:35:45,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:35:45,046 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] [2020-10-27 05:35:45,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 05:35:45,046 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:35:45,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:35:45,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1739323891, now seen corresponding path program 1 times [2020-10-27 05:35:45,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:35:45,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010922595] [2020-10-27 05:35:45,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:35:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:45,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:45,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:45,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:46,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:46,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:35:46,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 05:35:46,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1158 [2020-10-27 05:35:46,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:46,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 05:35:46,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:35:46,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 05:35:46,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:46,638 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:35:46,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:35:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:35:46,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:35:46,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:35:46,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:35:46,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:35:46,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 05:35:46,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:35:46,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:35:46,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:35:46,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:35:46,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:35:46,709 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:35:46,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010922595] [2020-10-27 05:35:46,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:35:46,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 05:35:46,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500958782] [2020-10-27 05:35:46,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 05:35:46,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:35:46,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 05:35:46,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-27 05:35:46,711 INFO L87 Difference]: Start difference. First operand 74685 states and 105672 transitions. Second operand 11 states. [2020-10-27 05:35:46,934 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-27 05:35:49,665 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-27 05:35:49,917 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-27 05:35:50,387 WARN L193 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 135 [2020-10-27 05:35:50,690 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-27 05:35:57,575 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 133 [2020-10-27 05:36:39,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 05:36:39,919 INFO L93 Difference]: Finished difference Result 424997 states and 596291 transitions. [2020-10-27 05:36:39,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 05:36:39,919 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-10-27 05:36:39,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 05:36:40,858 INFO L225 Difference]: With dead ends: 424997 [2020-10-27 05:36:40,858 INFO L226 Difference]: Without dead ends: 350338 [2020-10-27 05:36:40,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=441, Invalid=1539, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 05:36:41,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 350338 states. [2020-10-27 05:37:09,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 350338 to 192625. [2020-10-27 05:37:09,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192625 states. [2020-10-27 05:37:10,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192625 states to 192625 states and 270976 transitions. [2020-10-27 05:37:10,352 INFO L78 Accepts]: Start accepts. Automaton has 192625 states and 270976 transitions. Word has length 68 [2020-10-27 05:37:10,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 05:37:10,352 INFO L481 AbstractCegarLoop]: Abstraction has 192625 states and 270976 transitions. [2020-10-27 05:37:10,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 05:37:10,353 INFO L276 IsEmpty]: Start isEmpty. Operand 192625 states and 270976 transitions. [2020-10-27 05:37:10,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 05:37:10,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 05:37:10,360 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] [2020-10-27 05:37:10,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 05:37:10,360 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 05:37:10,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 05:37:10,361 INFO L82 PathProgramCache]: Analyzing trace with hash 376561902, now seen corresponding path program 1 times [2020-10-27 05:37:10,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 05:37:10,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [861614575] [2020-10-27 05:37:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 05:37:10,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:10,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:10,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:10,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:10,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:11,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:13,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:13,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 05:37:13,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 05:37:13,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3245 [2020-10-27 05:37:13,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:13,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 05:37:13,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 05:37:13,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 05:37:13,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:13,876 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-10-27 05:37:13,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 05:37:13,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 05:37:13,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 05:37:13,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 05:37:13,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 05:37:13,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 05:37:13,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 05:37:13,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 05:37:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 05:37:13,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 05:37:13,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 05:37:13,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 05:37:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 05:37:13,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [861614575] [2020-10-27 05:37:13,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 05:37:13,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 05:37:13,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684791775] [2020-10-27 05:37:13,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 05:37:13,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 05:37:13,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 05:37:13,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 05:37:13,947 INFO L87 Difference]: Start difference. First operand 192625 states and 270976 transitions. Second operand 8 states. [2020-10-27 05:37:14,227 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 130 [2020-10-27 05:37:15,965 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-27 05:37:16,318 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 132