/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:12:17,890 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:12:17,896 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:12:17,953 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:12:17,953 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:12:17,960 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:12:17,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:12:17,967 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:12:17,970 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:12:17,976 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:12:17,977 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:12:17,979 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:12:17,979 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:12:17,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:12:17,986 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:12:17,989 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:12:17,990 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:12:17,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:12:18,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:12:18,010 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:12:18,012 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:12:18,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:12:18,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:12:18,018 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:12:18,027 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:12:18,047 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:12:18,048 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:12:18,050 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:12:18,050 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:12:18,052 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:12:18,052 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:12:18,053 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:12:18,055 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:12:18,056 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:12:18,057 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:12:18,057 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:12:18,058 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:12:18,058 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:12:18,058 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:12:18,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:12:18,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:12:18,068 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:12:18,120 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:12:18,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:12:18,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:12:18,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:12:18,125 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:12:18,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:12:18,126 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:12:18,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:12:18,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:12:18,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:12:18,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:12:18,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:12:18,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:12:18,128 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:12:18,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:12:18,129 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:12:18,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:12:18,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:12:18,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:12:18,130 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:12:18,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:12:18,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:12:18,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:12:18,131 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:12:18,131 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:12:18,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:12:18,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:12:18,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:12:18,132 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:12:18,132 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:12:18,572 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:12:18,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:12:18,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:12:18,616 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:12:18,617 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:12:18,618 INFO L432 ainManager$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.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:12:18,693 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c7f81997/1bd0e799ba034955934e3ac5e26de970/FLAG8ccc2ae4b [2020-10-28 00:12:19,465 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:12:19,466 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:12:19,481 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c7f81997/1bd0e799ba034955934e3ac5e26de970/FLAG8ccc2ae4b [2020-10-28 00:12:19,748 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c7f81997/1bd0e799ba034955934e3ac5e26de970 [2020-10-28 00:12:19,753 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:12:19,760 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:12:19,763 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:12:19,763 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:12:19,767 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:12:19,768 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:12:19" (1/1) ... [2020-10-28 00:12:19,771 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dbc82a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:12:19, skipping insertion in model container [2020-10-28 00:12:19,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:12:19" (1/1) ... [2020-10-28 00:12:19,780 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:12:19,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:12:20,100 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:12:20,121 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:12:20,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:12:20,210 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:12:20,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:12:20 WrapperNode [2020-10-28 00:12:20,210 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:12:20,212 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:12:20,212 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:12:20,212 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:12:20,226 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:12:20" (1/1) ... [2020-10-28 00:12:20,226 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:12:20" (1/1) ... [2020-10-28 00:12:20,239 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:12:20" (1/1) ... [2020-10-28 00:12:20,239 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:12:20" (1/1) ... [2020-10-28 00:12:20,254 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:12:20" (1/1) ... [2020-10-28 00:12:20,268 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:12:20" (1/1) ... [2020-10-28 00:12:20,276 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:12:20" (1/1) ... [2020-10-28 00:12:20,289 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:12:20,290 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:12:20,290 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:12:20,290 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:12:20,293 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:12:20" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:12:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:12:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:12:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:12:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:12:20,367 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:12:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:12:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:12:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:12:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:12:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:12:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:12:20,368 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 00:12:20,369 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:12:20,369 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:12:20,369 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:12:20,369 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:12:20,369 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:12:20,369 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:12:20,370 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:12:20,370 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:12:20,370 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:12:20,370 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:12:20,370 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:12:20,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:12:20,370 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:12:20,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:12:20,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:12:20,371 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:12:20,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:12:21,141 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:12:21,142 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:12:21,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:12:21 BoogieIcfgContainer [2020-10-28 00:12:21,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:12:21,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:12:21,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:12:21,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:12:21,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:12:19" (1/3) ... [2020-10-28 00:12:21,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb00e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:12:21, skipping insertion in model container [2020-10-28 00:12:21,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:12:20" (2/3) ... [2020-10-28 00:12:21,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb00e08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:12:21, skipping insertion in model container [2020-10-28 00:12:21,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:12:21" (3/3) ... [2020-10-28 00:12:21,154 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-28 00:12:21,167 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:12:21,172 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:12:21,188 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:12:21,220 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:12:21,220 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:12:21,221 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:12:21,221 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:12:21,221 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:12:21,221 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:12:21,221 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:12:21,221 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:12:21,243 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states. [2020-10-28 00:12:21,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 00:12:21,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:21,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:21,255 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:21,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:21,262 INFO L82 PathProgramCache]: Analyzing trace with hash -2013588652, now seen corresponding path program 1 times [2020-10-28 00:12:21,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:21,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058548560] [2020-10-28 00:12:21,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:21,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:21,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:22,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:22,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:24,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:24,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 00:12:24,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 00:12:24,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3454 [2020-10-28 00:12:24,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:24,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:24,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 00:12:24,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:12:24,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:12:25,351 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:25,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:25,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:25,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:25,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:25,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:25,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-28 00:12:25,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:25,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:25,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:25,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:25,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:12:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:25,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058548560] [2020-10-28 00:12:25,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:25,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:25,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459511831] [2020-10-28 00:12:25,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:25,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:25,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:25,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:25,467 INFO L87 Difference]: Start difference. First operand 116 states. Second operand 4 states. [2020-10-28 00:12:25,728 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:12:26,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:26,333 INFO L93 Difference]: Finished difference Result 264 states and 416 transitions. [2020-10-28 00:12:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:26,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2020-10-28 00:12:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:26,347 INFO L225 Difference]: With dead ends: 264 [2020-10-28 00:12:26,347 INFO L226 Difference]: Without dead ends: 171 [2020-10-28 00:12:26,351 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:12:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-28 00:12:26,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2020-10-28 00:12:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-28 00:12:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 248 transitions. [2020-10-28 00:12:26,426 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 248 transitions. Word has length 53 [2020-10-28 00:12:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:26,427 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 248 transitions. [2020-10-28 00:12:26,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:26,427 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 248 transitions. [2020-10-28 00:12:26,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 00:12:26,432 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:26,432 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:26,433 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:12:26,433 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:26,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:26,434 INFO L82 PathProgramCache]: Analyzing trace with hash 735589430, now seen corresponding path program 1 times [2020-10-28 00:12:26,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:26,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012841638] [2020-10-28 00:12:26,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:26,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:26,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:26,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:26,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:27,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:27,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 00:12:27,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:12:27,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1386 [2020-10-28 00:12:27,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:27,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:27,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 00:12:27,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:12:27,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:12:28,166 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:28,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:28,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:28,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:28,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:28,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:28,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:28,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-28 00:12:28,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:28,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:28,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:28,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:28,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:12:28,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:28,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012841638] [2020-10-28 00:12:28,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:28,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:28,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235398969] [2020-10-28 00:12:28,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:28,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:28,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:28,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:28,247 INFO L87 Difference]: Start difference. First operand 168 states and 248 transitions. Second operand 4 states. [2020-10-28 00:12:28,472 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:12:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:29,017 INFO L93 Difference]: Finished difference Result 410 states and 630 transitions. [2020-10-28 00:12:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:29,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-28 00:12:29,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:29,023 INFO L225 Difference]: With dead ends: 410 [2020-10-28 00:12:29,023 INFO L226 Difference]: Without dead ends: 273 [2020-10-28 00:12:29,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:12:29,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-10-28 00:12:29,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 270. [2020-10-28 00:12:29,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-10-28 00:12:29,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 409 transitions. [2020-10-28 00:12:29,058 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 409 transitions. Word has length 54 [2020-10-28 00:12:29,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:29,058 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 409 transitions. [2020-10-28 00:12:29,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:29,059 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 409 transitions. [2020-10-28 00:12:29,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 00:12:29,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:29,061 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:29,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:12:29,061 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:29,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:29,062 INFO L82 PathProgramCache]: Analyzing trace with hash 724490347, now seen corresponding path program 1 times [2020-10-28 00:12:29,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:29,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217608577] [2020-10-28 00:12:29,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:29,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:29,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:29,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:29,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 00:12:29,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:12:29,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 644 [2020-10-28 00:12:29,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:29,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:29,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 00:12:29,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:12:29,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:29,962 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:29,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:29,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:29,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:29,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:29,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:29,980 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:29,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:12:29,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:29,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:29,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:29,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:29,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:29,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:30,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217608577] [2020-10-28 00:12:30,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:30,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:30,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768827860] [2020-10-28 00:12:30,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:30,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:30,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:30,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:30,002 INFO L87 Difference]: Start difference. First operand 270 states and 409 transitions. Second operand 4 states. [2020-10-28 00:12:30,199 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:12:30,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:30,855 INFO L93 Difference]: Finished difference Result 684 states and 1061 transitions. [2020-10-28 00:12:30,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:30,856 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 55 [2020-10-28 00:12:30,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:30,860 INFO L225 Difference]: With dead ends: 684 [2020-10-28 00:12:30,860 INFO L226 Difference]: Without dead ends: 445 [2020-10-28 00:12:30,862 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 [2020-10-28 00:12:30,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2020-10-28 00:12:30,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 442. [2020-10-28 00:12:30,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 442 states. [2020-10-28 00:12:30,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 677 transitions. [2020-10-28 00:12:30,901 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 677 transitions. Word has length 55 [2020-10-28 00:12:30,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:30,901 INFO L481 AbstractCegarLoop]: Abstraction has 442 states and 677 transitions. [2020-10-28 00:12:30,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:30,901 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 677 transitions. [2020-10-28 00:12:30,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 00:12:30,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:30,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:30,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:12:30,904 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:30,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:30,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1199333173, now seen corresponding path program 1 times [2020-10-28 00:12:30,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:30,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509924229] [2020-10-28 00:12:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:30,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:30,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:30,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:32,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:32,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 00:12:32,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:12:32,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1390 [2020-10-28 00:12:32,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:32,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:12:32,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-28 00:12:32,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 00:12:32,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:32,561 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:32,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:32,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:32,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:32,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:32,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:32,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:32,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:12:32,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:32,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:32,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:32,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:32,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:32,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:32,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509924229] [2020-10-28 00:12:32,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:32,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:12:32,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386684100] [2020-10-28 00:12:32,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:12:32,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:32,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:12:32,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:12:32,608 INFO L87 Difference]: Start difference. First operand 442 states and 677 transitions. Second operand 7 states. [2020-10-28 00:12:32,837 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 00:12:33,531 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:12:33,749 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:12:33,966 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 00:12:34,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:34,160 INFO L93 Difference]: Finished difference Result 2497 states and 3907 transitions. [2020-10-28 00:12:34,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:12:34,161 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-10-28 00:12:34,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:34,187 INFO L225 Difference]: With dead ends: 2497 [2020-10-28 00:12:34,187 INFO L226 Difference]: Without dead ends: 2086 [2020-10-28 00:12:34,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-28 00:12:34,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2086 states. [2020-10-28 00:12:34,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2086 to 850. [2020-10-28 00:12:34,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 850 states. [2020-10-28 00:12:34,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1305 transitions. [2020-10-28 00:12:34,282 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1305 transitions. Word has length 56 [2020-10-28 00:12:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:34,282 INFO L481 AbstractCegarLoop]: Abstraction has 850 states and 1305 transitions. [2020-10-28 00:12:34,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:12:34,283 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1305 transitions. [2020-10-28 00:12:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 00:12:34,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:34,286 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:34,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:12:34,286 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:34,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:34,287 INFO L82 PathProgramCache]: Analyzing trace with hash -2050114728, now seen corresponding path program 1 times [2020-10-28 00:12:34,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:34,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650524779] [2020-10-28 00:12:34,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:34,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:34,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:34,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:34,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:34,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 00:12:34,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:12:34,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 620 [2020-10-28 00:12:34,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:34,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:12:34,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-28 00:12:34,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 00:12:34,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:35,207 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:35,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:35,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:35,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:35,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:35,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:35,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:35,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:12:35,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:35,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:35,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:35,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:35,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650524779] [2020-10-28 00:12:35,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:35,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 00:12:35,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499215797] [2020-10-28 00:12:35,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:12:35,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:35,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:12:35,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:12:35,252 INFO L87 Difference]: Start difference. First operand 850 states and 1305 transitions. Second operand 5 states. [2020-10-28 00:12:36,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:36,043 INFO L93 Difference]: Finished difference Result 1701 states and 2611 transitions. [2020-10-28 00:12:36,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 00:12:36,043 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 57 [2020-10-28 00:12:36,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:36,053 INFO L225 Difference]: With dead ends: 1701 [2020-10-28 00:12:36,054 INFO L226 Difference]: Without dead ends: 1698 [2020-10-28 00:12:36,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:12:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2020-10-28 00:12:36,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 882. [2020-10-28 00:12:36,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 882 states. [2020-10-28 00:12:36,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1337 transitions. [2020-10-28 00:12:36,158 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1337 transitions. Word has length 57 [2020-10-28 00:12:36,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:36,159 INFO L481 AbstractCegarLoop]: Abstraction has 882 states and 1337 transitions. [2020-10-28 00:12:36,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:12:36,159 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1337 transitions. [2020-10-28 00:12:36,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 00:12:36,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:36,168 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:36,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:12:36,168 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:36,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:36,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1168942790, now seen corresponding path program 1 times [2020-10-28 00:12:36,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:36,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350405581] [2020-10-28 00:12:36,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:36,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:36,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:36,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:36,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:36,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 00:12:36,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:12:36,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 652 [2020-10-28 00:12:36,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:36,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 00:12:36,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 00:12:36,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 00:12:36,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:37,115 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:37,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:37,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:37,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:37,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:37,149 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:37,149 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:37,149 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 00:12:37,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:37,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:37,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:37,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:37,150 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:37,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350405581] [2020-10-28 00:12:37,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:37,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 00:12:37,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993350470] [2020-10-28 00:12:37,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 00:12:37,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:37,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 00:12:37,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 00:12:37,193 INFO L87 Difference]: Start difference. First operand 882 states and 1337 transitions. Second operand 7 states. [2020-10-28 00:12:37,859 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:12:38,044 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 00:12:38,230 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:12:38,428 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-28 00:12:39,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:39,095 INFO L93 Difference]: Finished difference Result 3878 states and 5889 transitions. [2020-10-28 00:12:39,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 00:12:39,095 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 58 [2020-10-28 00:12:39,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:39,114 INFO L225 Difference]: With dead ends: 3878 [2020-10-28 00:12:39,115 INFO L226 Difference]: Without dead ends: 3027 [2020-10-28 00:12:39,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:12:39,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3027 states. [2020-10-28 00:12:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3027 to 3018. [2020-10-28 00:12:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3018 states. [2020-10-28 00:12:39,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3018 states to 3018 states and 4561 transitions. [2020-10-28 00:12:39,403 INFO L78 Accepts]: Start accepts. Automaton has 3018 states and 4561 transitions. Word has length 58 [2020-10-28 00:12:39,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:39,405 INFO L481 AbstractCegarLoop]: Abstraction has 3018 states and 4561 transitions. [2020-10-28 00:12:39,405 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 00:12:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3018 states and 4561 transitions. [2020-10-28 00:12:39,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:12:39,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:39,408 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:39,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:12:39,408 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:39,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:39,409 INFO L82 PathProgramCache]: Analyzing trace with hash 125034013, now seen corresponding path program 1 times [2020-10-28 00:12:39,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:39,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [677579530] [2020-10-28 00:12:39,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:39,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:39,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:39,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:39,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:12:39,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:12:39,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 547 [2020-10-28 00:12:39,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:39,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:39,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:12:39,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:12:39,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:40,174 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:40,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:40,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:40,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:40,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:40,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:40,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:40,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:12:40,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:40,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:40,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:40,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:40,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:40,213 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:40,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [677579530] [2020-10-28 00:12:40,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:40,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:40,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798218464] [2020-10-28 00:12:40,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:40,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:40,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:40,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:40,216 INFO L87 Difference]: Start difference. First operand 3018 states and 4561 transitions. Second operand 4 states. [2020-10-28 00:12:40,391 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:12:41,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:41,212 INFO L93 Difference]: Finished difference Result 8240 states and 12401 transitions. [2020-10-28 00:12:41,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:41,213 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-28 00:12:41,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:41,241 INFO L225 Difference]: With dead ends: 8240 [2020-10-28 00:12:41,241 INFO L226 Difference]: Without dead ends: 5253 [2020-10-28 00:12:41,248 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 [2020-10-28 00:12:41,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5253 states. [2020-10-28 00:12:41,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5253 to 5194. [2020-10-28 00:12:41,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5194 states. [2020-10-28 00:12:41,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5194 states to 5194 states and 7701 transitions. [2020-10-28 00:12:41,742 INFO L78 Accepts]: Start accepts. Automaton has 5194 states and 7701 transitions. Word has length 60 [2020-10-28 00:12:41,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:41,743 INFO L481 AbstractCegarLoop]: Abstraction has 5194 states and 7701 transitions. [2020-10-28 00:12:41,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:41,743 INFO L276 IsEmpty]: Start isEmpty. Operand 5194 states and 7701 transitions. [2020-10-28 00:12:41,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 00:12:41,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:41,745 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:41,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:12:41,745 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:41,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:41,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1455439000, now seen corresponding path program 1 times [2020-10-28 00:12:41,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:41,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663695649] [2020-10-28 00:12:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:41,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:41,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:41,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:42,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:42,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 00:12:42,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:12:42,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 360 [2020-10-28 00:12:42,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:42,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:42,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 00:12:42,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 00:12:42,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:42,315 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:42,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:42,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:42,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:42,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:42,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:42,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:42,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:12:42,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:42,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:42,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:42,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:42,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:42,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663695649] [2020-10-28 00:12:42,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:42,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:42,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149382493] [2020-10-28 00:12:42,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:42,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:42,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:42,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:42,358 INFO L87 Difference]: Start difference. First operand 5194 states and 7701 transitions. Second operand 4 states. [2020-10-28 00:12:42,570 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:12:43,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:43,811 INFO L93 Difference]: Finished difference Result 10339 states and 15421 transitions. [2020-10-28 00:12:43,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:43,812 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-28 00:12:43,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:43,849 INFO L225 Difference]: With dead ends: 10339 [2020-10-28 00:12:43,849 INFO L226 Difference]: Without dead ends: 7351 [2020-10-28 00:12:43,859 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 [2020-10-28 00:12:43,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7351 states. [2020-10-28 00:12:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7351 to 7348. [2020-10-28 00:12:44,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7348 states. [2020-10-28 00:12:44,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7348 states to 7348 states and 10823 transitions. [2020-10-28 00:12:44,566 INFO L78 Accepts]: Start accepts. Automaton has 7348 states and 10823 transitions. Word has length 60 [2020-10-28 00:12:44,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:44,567 INFO L481 AbstractCegarLoop]: Abstraction has 7348 states and 10823 transitions. [2020-10-28 00:12:44,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:44,567 INFO L276 IsEmpty]: Start isEmpty. Operand 7348 states and 10823 transitions. [2020-10-28 00:12:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:12:44,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:44,574 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:44,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 00:12:44,574 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:44,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:44,575 INFO L82 PathProgramCache]: Analyzing trace with hash 625564175, now seen corresponding path program 1 times [2020-10-28 00:12:44,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:44,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202074897] [2020-10-28 00:12:44,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:44,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:44,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:44,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:44,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:45,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:45,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:49,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:49,632 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:49,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:12:49,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:12:49,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 00:12:49,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:49,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:49,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 00:12:49,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 00:12:49,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:49,837 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:49,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:49,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:49,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:49,854 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:49,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:49,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:49,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 00:12:49,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:49,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:49,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:49,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:49,855 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:49,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202074897] [2020-10-28 00:12:49,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:49,877 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:49,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824277171] [2020-10-28 00:12:49,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:49,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:49,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:49,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:49,879 INFO L87 Difference]: Start difference. First operand 7348 states and 10823 transitions. Second operand 4 states. [2020-10-28 00:12:50,047 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:12:51,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:51,356 INFO L93 Difference]: Finished difference Result 17479 states and 25696 transitions. [2020-10-28 00:12:51,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:51,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 00:12:51,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:51,406 INFO L225 Difference]: With dead ends: 17479 [2020-10-28 00:12:51,407 INFO L226 Difference]: Without dead ends: 11644 [2020-10-28 00:12:51,422 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 [2020-10-28 00:12:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11644 states. [2020-10-28 00:12:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11644 to 11081. [2020-10-28 00:12:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11081 states. [2020-10-28 00:12:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11081 states to 11081 states and 16134 transitions. [2020-10-28 00:12:52,448 INFO L78 Accepts]: Start accepts. Automaton has 11081 states and 16134 transitions. Word has length 82 [2020-10-28 00:12:52,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:52,449 INFO L481 AbstractCegarLoop]: Abstraction has 11081 states and 16134 transitions. [2020-10-28 00:12:52,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:52,449 INFO L276 IsEmpty]: Start isEmpty. Operand 11081 states and 16134 transitions. [2020-10-28 00:12:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 00:12:52,456 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:52,457 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:52,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 00:12:52,457 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:52,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:52,458 INFO L82 PathProgramCache]: Analyzing trace with hash 2038228112, now seen corresponding path program 1 times [2020-10-28 00:12:52,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:52,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [257354333] [2020-10-28 00:12:52,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:52,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:52,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:52,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:52,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:52,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:53,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:57,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:57,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 00:12:57,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:12:57,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4531 [2020-10-28 00:12:57,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:57,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:12:57,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-28 00:12:57,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 00:12:57,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:57,242 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:12:57,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:12:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:57,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:57,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:57,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:12:57,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:12:57,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 00:12:57,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:57,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:12:57,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:12:57,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:12:57,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:12:57,300 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:12:57,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [257354333] [2020-10-28 00:12:57,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:12:57,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:12:57,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990916617] [2020-10-28 00:12:57,302 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:12:57,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:12:57,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:12:57,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:12:57,303 INFO L87 Difference]: Start difference. First operand 11081 states and 16134 transitions. Second operand 4 states. [2020-10-28 00:12:58,543 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 00:12:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:12:58,696 INFO L93 Difference]: Finished difference Result 18922 states and 27648 transitions. [2020-10-28 00:12:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:12:58,697 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-28 00:12:58,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:12:58,716 INFO L225 Difference]: With dead ends: 18922 [2020-10-28 00:12:58,716 INFO L226 Difference]: Without dead ends: 7883 [2020-10-28 00:12:58,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:12:58,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7883 states. [2020-10-28 00:12:59,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7883 to 7880. [2020-10-28 00:12:59,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7880 states. [2020-10-28 00:12:59,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7880 states to 7880 states and 11456 transitions. [2020-10-28 00:12:59,311 INFO L78 Accepts]: Start accepts. Automaton has 7880 states and 11456 transitions. Word has length 82 [2020-10-28 00:12:59,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:12:59,312 INFO L481 AbstractCegarLoop]: Abstraction has 7880 states and 11456 transitions. [2020-10-28 00:12:59,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:12:59,312 INFO L276 IsEmpty]: Start isEmpty. Operand 7880 states and 11456 transitions. [2020-10-28 00:12:59,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-28 00:12:59,317 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:12:59,317 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:12:59,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 00:12:59,317 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:12:59,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:12:59,318 INFO L82 PathProgramCache]: Analyzing trace with hash 754870029, now seen corresponding path program 1 times [2020-10-28 00:12:59,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:12:59,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578053058] [2020-10-28 00:12:59,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:12:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:12:59,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:59,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:12:59,815 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:12:59,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 00:12:59,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 00:12:59,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-28 00:12:59,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:12:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 00:12:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 00:12:59,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-28 00:12:59,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:00,042 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:13:00,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:00,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:00,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:00,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:00,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:00,061 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:13:00,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:00,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:00,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:00,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:00,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 00:13:00,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578053058] [2020-10-28 00:13:00,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:13:00,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 00:13:00,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469075371] [2020-10-28 00:13:00,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 00:13:00,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:00,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 00:13:00,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:13:00,095 INFO L87 Difference]: Start difference. First operand 7880 states and 11456 transitions. Second operand 5 states. [2020-10-28 00:13:00,295 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-28 00:13:01,148 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-28 00:13:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:02,196 INFO L93 Difference]: Finished difference Result 21269 states and 30870 transitions. [2020-10-28 00:13:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 00:13:02,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 83 [2020-10-28 00:13:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:02,236 INFO L225 Difference]: With dead ends: 21269 [2020-10-28 00:13:02,236 INFO L226 Difference]: Without dead ends: 13586 [2020-10-28 00:13:02,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-28 00:13:02,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13586 states. [2020-10-28 00:13:03,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13586 to 13487. [2020-10-28 00:13:03,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13487 states. [2020-10-28 00:13:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13487 states to 13487 states and 19274 transitions. [2020-10-28 00:13:03,183 INFO L78 Accepts]: Start accepts. Automaton has 13487 states and 19274 transitions. Word has length 83 [2020-10-28 00:13:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:03,183 INFO L481 AbstractCegarLoop]: Abstraction has 13487 states and 19274 transitions. [2020-10-28 00:13:03,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 00:13:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 13487 states and 19274 transitions. [2020-10-28 00:13:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:13:03,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:03,189 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:13:03,189 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 00:13:03,189 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:03,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:03,190 INFO L82 PathProgramCache]: Analyzing trace with hash 2115481462, now seen corresponding path program 1 times [2020-10-28 00:13:03,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:03,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1170028179] [2020-10-28 00:13:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:03,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:03,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:03,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:03,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:03,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:06,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:08,219 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:08,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:13:08,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 00:13:08,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 00:13:08,220 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:08,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:13:08,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 00:13:08,220 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 00:13:08,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:08,404 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:13:08,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:08,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:08,423 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:08,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:08,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:08,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:13:08,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:08,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:08,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:08,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:08,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:08,446 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:13:08,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1170028179] [2020-10-28 00:13:08,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:13:08,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:13:08,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752191776] [2020-10-28 00:13:08,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:13:08,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:08,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:13:08,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:13:08,449 INFO L87 Difference]: Start difference. First operand 13487 states and 19274 transitions. Second operand 4 states. [2020-10-28 00:13:08,623 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:13:10,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:10,400 INFO L93 Difference]: Finished difference Result 34237 states and 48838 transitions. [2020-10-28 00:13:10,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:13:10,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-28 00:13:10,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:10,457 INFO L225 Difference]: With dead ends: 34237 [2020-10-28 00:13:10,457 INFO L226 Difference]: Without dead ends: 23320 [2020-10-28 00:13:10,485 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 [2020-10-28 00:13:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23320 states. [2020-10-28 00:13:12,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23320 to 23317. [2020-10-28 00:13:12,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23317 states. [2020-10-28 00:13:12,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23317 states to 23317 states and 32958 transitions. [2020-10-28 00:13:12,335 INFO L78 Accepts]: Start accepts. Automaton has 23317 states and 32958 transitions. Word has length 84 [2020-10-28 00:13:12,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:12,335 INFO L481 AbstractCegarLoop]: Abstraction has 23317 states and 32958 transitions. [2020-10-28 00:13:12,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:13:12,335 INFO L276 IsEmpty]: Start isEmpty. Operand 23317 states and 32958 transitions. [2020-10-28 00:13:12,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:13:12,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:12,343 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:13:12,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 00:13:12,343 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:12,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:12,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1578224994, now seen corresponding path program 1 times [2020-10-28 00:13:12,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:12,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2067273531] [2020-10-28 00:13:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:12,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:12,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:12,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:12,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:12,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:12,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:14,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:14,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:13:14,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:13:14,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1745 [2020-10-28 00:13:14,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:14,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:13:14,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:13:14,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 00:13:14,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:14,307 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:13:14,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:14,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:14,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:14,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:14,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:14,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:14,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:13:14,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:14,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:14,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:14,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:14,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:13:14,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2067273531] [2020-10-28 00:13:14,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:13:14,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:13:14,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475172084] [2020-10-28 00:13:14,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:13:14,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:14,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:13:14,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:13:14,347 INFO L87 Difference]: Start difference. First operand 23317 states and 32958 transitions. Second operand 6 states. [2020-10-28 00:13:15,519 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:13:15,824 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:13:18,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:18,660 INFO L93 Difference]: Finished difference Result 72500 states and 101903 transitions. [2020-10-28 00:13:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:13:18,660 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-28 00:13:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:18,769 INFO L225 Difference]: With dead ends: 72500 [2020-10-28 00:13:18,769 INFO L226 Difference]: Without dead ends: 49239 [2020-10-28 00:13:18,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:13:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49239 states. [2020-10-28 00:13:21,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49239 to 28106. [2020-10-28 00:13:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28106 states. [2020-10-28 00:13:21,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28106 states to 28106 states and 39155 transitions. [2020-10-28 00:13:21,478 INFO L78 Accepts]: Start accepts. Automaton has 28106 states and 39155 transitions. Word has length 84 [2020-10-28 00:13:21,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:21,478 INFO L481 AbstractCegarLoop]: Abstraction has 28106 states and 39155 transitions. [2020-10-28 00:13:21,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:13:21,478 INFO L276 IsEmpty]: Start isEmpty. Operand 28106 states and 39155 transitions. [2020-10-28 00:13:21,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:13:21,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:21,486 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:13:21,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 00:13:21,487 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:21,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:21,487 INFO L82 PathProgramCache]: Analyzing trace with hash -628783879, now seen corresponding path program 1 times [2020-10-28 00:13:21,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:21,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1423632811] [2020-10-28 00:13:21,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:21,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:21,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:21,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:21,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:22,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:22,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:22,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:24,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:26,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:26,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:13:26,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 00:13:26,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 00:13:26,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:26,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:13:26,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-28 00:13:26,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 00:13:26,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:26,724 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:13:26,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:26,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:26,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:26,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:26,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:26,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 00:13:26,745 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:26,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:26,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:26,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:26,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:26,770 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:13:26,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1423632811] [2020-10-28 00:13:26,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:13:26,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:13:26,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285352797] [2020-10-28 00:13:26,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:13:26,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:26,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:13:26,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:13:26,773 INFO L87 Difference]: Start difference. First operand 28106 states and 39155 transitions. Second operand 4 states. [2020-10-28 00:13:26,997 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:13:29,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:29,796 INFO L93 Difference]: Finished difference Result 43605 states and 60462 transitions. [2020-10-28 00:13:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:13:29,797 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-28 00:13:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:29,852 INFO L225 Difference]: With dead ends: 43605 [2020-10-28 00:13:29,853 INFO L226 Difference]: Without dead ends: 29442 [2020-10-28 00:13:29,872 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 [2020-10-28 00:13:29,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29442 states. [2020-10-28 00:13:32,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29442 to 28149. [2020-10-28 00:13:32,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28149 states. [2020-10-28 00:13:32,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28149 states to 28149 states and 38580 transitions. [2020-10-28 00:13:32,201 INFO L78 Accepts]: Start accepts. Automaton has 28149 states and 38580 transitions. Word has length 84 [2020-10-28 00:13:32,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:32,202 INFO L481 AbstractCegarLoop]: Abstraction has 28149 states and 38580 transitions. [2020-10-28 00:13:32,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:13:32,202 INFO L276 IsEmpty]: Start isEmpty. Operand 28149 states and 38580 transitions. [2020-10-28 00:13:32,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:13:32,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:32,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:13:32,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 00:13:32,211 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:32,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:32,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1302985845, now seen corresponding path program 1 times [2020-10-28 00:13:32,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:32,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199114503] [2020-10-28 00:13:32,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:32,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:32,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:32,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:32,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:32,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:34,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:34,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:13:34,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:13:34,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2248 [2020-10-28 00:13:34,485 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:34,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:13:34,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:13:34,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 00:13:34,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:34,679 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:13:34,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:34,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:34,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:34,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:34,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:34,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:34,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:13:34,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:34,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:34,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:34,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:34,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:34,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:13:34,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199114503] [2020-10-28 00:13:34,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:13:34,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:13:34,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575800200] [2020-10-28 00:13:34,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:13:34,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:34,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:13:34,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:13:34,712 INFO L87 Difference]: Start difference. First operand 28149 states and 38580 transitions. Second operand 6 states. [2020-10-28 00:13:36,214 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:13:36,602 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:13:41,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:41,086 INFO L93 Difference]: Finished difference Result 95055 states and 130280 transitions. [2020-10-28 00:13:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:13:41,086 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-28 00:13:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:41,199 INFO L225 Difference]: With dead ends: 95055 [2020-10-28 00:13:41,200 INFO L226 Difference]: Without dead ends: 67024 [2020-10-28 00:13:41,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:13:41,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67024 states. [2020-10-28 00:13:44,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67024 to 38038. [2020-10-28 00:13:44,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38038 states. [2020-10-28 00:13:44,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38038 states to 38038 states and 51503 transitions. [2020-10-28 00:13:44,992 INFO L78 Accepts]: Start accepts. Automaton has 38038 states and 51503 transitions. Word has length 84 [2020-10-28 00:13:44,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:44,992 INFO L481 AbstractCegarLoop]: Abstraction has 38038 states and 51503 transitions. [2020-10-28 00:13:44,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:13:44,992 INFO L276 IsEmpty]: Start isEmpty. Operand 38038 states and 51503 transitions. [2020-10-28 00:13:45,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:13:45,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:45,005 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:13:45,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 00:13:45,005 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:45,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:45,005 INFO L82 PathProgramCache]: Analyzing trace with hash -817543592, now seen corresponding path program 1 times [2020-10-28 00:13:45,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:45,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513403586] [2020-10-28 00:13:45,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:45,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:45,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:45,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:45,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:45,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:45,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:47,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:47,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:50,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:50,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:13:50,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:13:50,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 00:13:50,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:13:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:13:50,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 00:13:50,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:50,229 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:13:50,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:13:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:50,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:50,245 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:13:50,245 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:13:50,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:13:50,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 00:13:50,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:13:50,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:13:50,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:13:50,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:13:50,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:13:50,260 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:13:50,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513403586] [2020-10-28 00:13:50,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:13:50,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:13:50,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843590987] [2020-10-28 00:13:50,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:13:50,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:13:50,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:13:50,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:13:50,262 INFO L87 Difference]: Start difference. First operand 38038 states and 51503 transitions. Second operand 6 states. [2020-10-28 00:13:51,536 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:13:52,784 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:13:54,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:13:54,986 INFO L93 Difference]: Finished difference Result 84492 states and 114083 transitions. [2020-10-28 00:13:54,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 00:13:54,986 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 84 [2020-10-28 00:13:54,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:13:55,067 INFO L225 Difference]: With dead ends: 84492 [2020-10-28 00:13:55,067 INFO L226 Difference]: Without dead ends: 46759 [2020-10-28 00:13:55,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:13:55,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46759 states. [2020-10-28 00:13:58,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46759 to 37766. [2020-10-28 00:13:58,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37766 states. [2020-10-28 00:13:58,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37766 states to 37766 states and 50391 transitions. [2020-10-28 00:13:58,642 INFO L78 Accepts]: Start accepts. Automaton has 37766 states and 50391 transitions. Word has length 84 [2020-10-28 00:13:58,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:13:58,643 INFO L481 AbstractCegarLoop]: Abstraction has 37766 states and 50391 transitions. [2020-10-28 00:13:58,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:13:58,643 INFO L276 IsEmpty]: Start isEmpty. Operand 37766 states and 50391 transitions. [2020-10-28 00:13:58,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 00:13:58,653 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:13:58,653 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:13:58,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 00:13:58,653 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:13:58,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:13:58,654 INFO L82 PathProgramCache]: Analyzing trace with hash 595120345, now seen corresponding path program 1 times [2020-10-28 00:13:58,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:13:58,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470790814] [2020-10-28 00:13:58,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:13:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:13:58,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:58,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:13:59,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:00,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:00,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 00:14:00,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 00:14:00,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1328 [2020-10-28 00:14:00,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:00,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:14:00,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-28 00:14:00,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:14:00,006 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:00,188 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:14:00,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:00,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:00,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:00,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:00,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:00,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:14:00,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:00,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:00,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:00,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470790814] [2020-10-28 00:14:00,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:14:00,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:14:00,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732835733] [2020-10-28 00:14:00,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:14:00,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:00,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:14:00,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:14:00,216 INFO L87 Difference]: Start difference. First operand 37766 states and 50391 transitions. Second operand 4 states. [2020-10-28 00:14:00,401 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 152 [2020-10-28 00:14:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:05,254 INFO L93 Difference]: Finished difference Result 73619 states and 97801 transitions. [2020-10-28 00:14:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:14:05,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-28 00:14:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:05,319 INFO L225 Difference]: With dead ends: 73619 [2020-10-28 00:14:05,320 INFO L226 Difference]: Without dead ends: 48479 [2020-10-28 00:14:05,354 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 [2020-10-28 00:14:05,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48479 states. [2020-10-28 00:14:09,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48479 to 47560. [2020-10-28 00:14:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47560 states. [2020-10-28 00:14:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47560 states to 47560 states and 62458 transitions. [2020-10-28 00:14:09,720 INFO L78 Accepts]: Start accepts. Automaton has 47560 states and 62458 transitions. Word has length 84 [2020-10-28 00:14:09,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:09,721 INFO L481 AbstractCegarLoop]: Abstraction has 47560 states and 62458 transitions. [2020-10-28 00:14:09,721 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:14:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 47560 states and 62458 transitions. [2020-10-28 00:14:09,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 00:14:09,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:09,729 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:14:09,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 00:14:09,729 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:09,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:09,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1574335050, now seen corresponding path program 1 times [2020-10-28 00:14:09,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:09,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367799756] [2020-10-28 00:14:09,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:09,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:09,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:09,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:10,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:10,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:11,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:11,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-28 00:14:11,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 00:14:11,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1667 [2020-10-28 00:14:11,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:11,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:14:11,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:14:11,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 00:14:11,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:11,724 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:14:11,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:11,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:11,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:11,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:11,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:11,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:11,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 00:14:11,737 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:11,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:11,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:11,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:11,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:11,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367799756] [2020-10-28 00:14:11,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:14:11,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:14:11,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631223675] [2020-10-28 00:14:11,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:14:11,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:11,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:14:11,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:14:11,751 INFO L87 Difference]: Start difference. First operand 47560 states and 62458 transitions. Second operand 6 states. [2020-10-28 00:14:13,207 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:14:13,652 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:14:19,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:19,777 INFO L93 Difference]: Finished difference Result 121000 states and 158337 transitions. [2020-10-28 00:14:19,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 00:14:19,778 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-28 00:14:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:20,047 INFO L225 Difference]: With dead ends: 121000 [2020-10-28 00:14:20,047 INFO L226 Difference]: Without dead ends: 73732 [2020-10-28 00:14:20,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:14:20,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73732 states. [2020-10-28 00:14:25,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73732 to 49210. [2020-10-28 00:14:25,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49210 states. [2020-10-28 00:14:25,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49210 states to 49210 states and 63339 transitions. [2020-10-28 00:14:25,311 INFO L78 Accepts]: Start accepts. Automaton has 49210 states and 63339 transitions. Word has length 85 [2020-10-28 00:14:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:25,311 INFO L481 AbstractCegarLoop]: Abstraction has 49210 states and 63339 transitions. [2020-10-28 00:14:25,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:14:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 49210 states and 63339 transitions. [2020-10-28 00:14:25,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 00:14:25,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:25,320 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:14:25,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 00:14:25,321 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:25,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:25,321 INFO L82 PathProgramCache]: Analyzing trace with hash 511912994, now seen corresponding path program 1 times [2020-10-28 00:14:25,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:25,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163428411] [2020-10-28 00:14:25,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:25,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:25,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:25,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:25,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:25,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:25,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:25,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:25,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:26,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:26,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:26,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:27,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:30,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:30,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 00:14:30,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 00:14:30,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 00:14:30,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:30,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 00:14:30,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-28 00:14:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 00:14:30,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:30,690 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:14:30,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:14:30,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:30,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:30,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:14:30,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:14:30,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:14:30,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 00:14:30,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:14:30,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:14:30,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:14:30,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:14:30,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:14:30,734 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:14:30,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163428411] [2020-10-28 00:14:30,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:14:30,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 00:14:30,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704965191] [2020-10-28 00:14:30,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 00:14:30,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:14:30,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 00:14:30,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-28 00:14:30,737 INFO L87 Difference]: Start difference. First operand 49210 states and 63339 transitions. Second operand 11 states. [2020-10-28 00:14:30,959 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 156 [2020-10-28 00:14:34,151 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:14:34,839 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:14:35,651 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:14:49,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:14:49,190 INFO L93 Difference]: Finished difference Result 177832 states and 226492 transitions. [2020-10-28 00:14:49,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 00:14:49,191 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 86 [2020-10-28 00:14:49,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:14:49,616 INFO L225 Difference]: With dead ends: 177832 [2020-10-28 00:14:49,616 INFO L226 Difference]: Without dead ends: 151580 [2020-10-28 00:14:49,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=411, Invalid=1569, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 00:14:49,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151580 states. [2020-10-28 00:14:56,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151580 to 53256. [2020-10-28 00:14:56,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53256 states. [2020-10-28 00:14:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53256 states to 53256 states and 68519 transitions. [2020-10-28 00:14:56,387 INFO L78 Accepts]: Start accepts. Automaton has 53256 states and 68519 transitions. Word has length 86 [2020-10-28 00:14:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:14:56,387 INFO L481 AbstractCegarLoop]: Abstraction has 53256 states and 68519 transitions. [2020-10-28 00:14:56,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 00:14:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 53256 states and 68519 transitions. [2020-10-28 00:14:56,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 00:14:56,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:14:56,398 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:14:56,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 00:14:56,398 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:14:56,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:14:56,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1057416029, now seen corresponding path program 1 times [2020-10-28 00:14:56,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:14:56,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181832357] [2020-10-28 00:14:56,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:14:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:14:56,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:56,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:56,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:57,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:57,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:58,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:14:58,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:01,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:01,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 00:15:01,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 00:15:01,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 00:15:01,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:01,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 00:15:01,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 00:15:01,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 00:15:01,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:01,627 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:15:01,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:01,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:01,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:01,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:01,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:01,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:01,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:15:01,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:01,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:01,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:01,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:01,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:01,659 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:01,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181832357] [2020-10-28 00:15:01,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:15:01,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 00:15:01,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519357553] [2020-10-28 00:15:01,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 00:15:01,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:01,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 00:15:01,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 00:15:01,661 INFO L87 Difference]: Start difference. First operand 53256 states and 68519 transitions. Second operand 6 states. [2020-10-28 00:15:01,855 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:15:03,610 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 150 [2020-10-28 00:15:04,192 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:15:20,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:15:20,153 INFO L93 Difference]: Finished difference Result 201848 states and 259225 transitions. [2020-10-28 00:15:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 00:15:20,154 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 86 [2020-10-28 00:15:20,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:15:20,401 INFO L225 Difference]: With dead ends: 201848 [2020-10-28 00:15:20,401 INFO L226 Difference]: Without dead ends: 152726 [2020-10-28 00:15:20,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 00:15:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152726 states. [2020-10-28 00:15:35,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152726 to 126542. [2020-10-28 00:15:35,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126542 states. [2020-10-28 00:15:35,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126542 states to 126542 states and 162095 transitions. [2020-10-28 00:15:35,574 INFO L78 Accepts]: Start accepts. Automaton has 126542 states and 162095 transitions. Word has length 86 [2020-10-28 00:15:35,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:15:35,574 INFO L481 AbstractCegarLoop]: Abstraction has 126542 states and 162095 transitions. [2020-10-28 00:15:35,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 00:15:35,574 INFO L276 IsEmpty]: Start isEmpty. Operand 126542 states and 162095 transitions. [2020-10-28 00:15:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 00:15:35,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:15:35,603 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:15:35,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 00:15:35,605 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:15:35,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:15:35,605 INFO L82 PathProgramCache]: Analyzing trace with hash 554371202, now seen corresponding path program 1 times [2020-10-28 00:15:35,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:15:35,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [585836507] [2020-10-28 00:15:35,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:15:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:35,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:35,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:35,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:35,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:36,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:36,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:36,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:36,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:37,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:37,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:40,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:40,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 00:15:40,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:15:40,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 00:15:40,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 00:15:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-28 00:15:40,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 00:15:40,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:41,071 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-28 00:15:41,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:15:41,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:15:41,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:15:41,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:15:41,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:15:41,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:15:41,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 00:15:41,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:15:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:15:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:15:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:15:41,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:15:41,115 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:15:41,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [585836507] [2020-10-28 00:15:41,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 00:15:41,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 00:15:41,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443333119] [2020-10-28 00:15:41,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 00:15:41,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:15:41,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 00:15:41,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-28 00:15:41,117 INFO L87 Difference]: Start difference. First operand 126542 states and 162095 transitions. Second operand 12 states. [2020-10-28 00:15:41,419 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-28 00:15:45,620 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-28 00:15:45,939 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-28 00:15:46,665 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-28 00:15:47,473 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-28 00:15:47,696 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 154