/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:20:30,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:20:30,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:20:30,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:20:30,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:20:30,854 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:20:30,856 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:20:30,858 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:20:30,860 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:20:30,861 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:20:30,862 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:20:30,864 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:20:30,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:20:30,866 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:20:30,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:20:30,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:20:30,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:20:30,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:20:30,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:20:30,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:20:30,887 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:20:30,889 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:20:30,891 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:20:30,892 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:20:30,895 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:20:30,895 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:20:30,896 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:20:30,897 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:20:30,898 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:20:30,899 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:20:30,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:20:30,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:20:30,901 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:20:30,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:20:30,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:20:30,904 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:20:30,905 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:20:30,905 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:20:30,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:20:30,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:20:30,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:20:30,909 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 19:20:30,938 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:20:30,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:20:30,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:20:30,941 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:20:30,941 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:20:30,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:20:30,942 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:20:30,942 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:20:30,942 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:20:30,943 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:20:30,943 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:20:30,943 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:20:30,944 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:20:30,944 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:20:30,944 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:20:30,945 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:20:30,945 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:20:30,945 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:20:30,946 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:20:30,946 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:20:30,946 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:20:30,946 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:20:30,947 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:20:30,947 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:20:30,947 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:20:30,948 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:20:30,948 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:20:30,948 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:20:30,948 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:20:30,949 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:20:31,361 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:20:31,391 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:20:31,395 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:20:31,396 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:20:31,397 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:20:31,399 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 19:20:31,489 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d54b8b841/1d476943a4484749aa4e90851ca54fdc/FLAGa5194360f [2020-10-28 19:20:32,359 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:20:32,360 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 19:20:32,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d54b8b841/1d476943a4484749aa4e90851ca54fdc/FLAGa5194360f [2020-10-28 19:20:32,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d54b8b841/1d476943a4484749aa4e90851ca54fdc [2020-10-28 19:20:32,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:20:32,531 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:20:32,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:20:32,538 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:20:32,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:20:32,544 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:20:32" (1/1) ... [2020-10-28 19:20:32,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6fe424fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:32, skipping insertion in model container [2020-10-28 19:20:32,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:20:32" (1/1) ... [2020-10-28 19:20:32,563 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:20:32,705 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:20:33,952 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:20:33,971 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:20:34,411 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:20:34,436 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:20:34,437 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:34 WrapperNode [2020-10-28 19:20:34,437 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:20:34,438 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:20:34,438 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:20:34,439 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:20:34,455 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:34" (1/1) ... [2020-10-28 19:20:34,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:34" (1/1) ... [2020-10-28 19:20:34,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:34" (1/1) ... [2020-10-28 19:20:34,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:34" (1/1) ... [2020-10-28 19:20:34,540 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:34" (1/1) ... [2020-10-28 19:20:34,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:34" (1/1) ... [2020-10-28 19:20:34,609 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:34" (1/1) ... [2020-10-28 19:20:34,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:20:34,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:20:34,632 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:20:34,632 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:20:34,636 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:34" (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 19:20:34,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:20:34,735 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:20:34,735 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:20:34,736 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:20:34,736 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:20:34,737 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:20:34,738 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:20:34,738 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:20:34,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:20:34,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:20:34,740 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:20:34,740 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:20:34,740 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:20:34,740 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:20:34,740 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:20:34,741 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:20:34,741 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:20:34,741 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:20:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:20:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:20:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:20:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:20:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:20:34,742 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:20:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:20:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:20:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:20:34,743 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:20:37,634 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:20:37,635 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:20:37,638 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:20:37 BoogieIcfgContainer [2020-10-28 19:20:37,638 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:20:37,640 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:20:37,640 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:20:37,644 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:20:37,644 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:20:32" (1/3) ... [2020-10-28 19:20:37,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cee144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:20:37, skipping insertion in model container [2020-10-28 19:20:37,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:20:34" (2/3) ... [2020-10-28 19:20:37,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24cee144 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:20:37, skipping insertion in model container [2020-10-28 19:20:37,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:20:37" (3/3) ... [2020-10-28 19:20:37,648 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-28 19:20:37,681 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:20:37,688 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:20:37,703 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:20:37,738 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:20:37,738 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:20:37,739 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:20:37,739 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:20:37,739 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:20:37,739 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:20:37,739 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:20:37,739 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:20:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states. [2020-10-28 19:20:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:20:37,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:20:37,808 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:37,809 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:20:37,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:20:37,816 INFO L82 PathProgramCache]: Analyzing trace with hash -540047237, now seen corresponding path program 1 times [2020-10-28 19:20:37,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:20:37,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608015005] [2020-10-28 19:20:37,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:20:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:38,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:39,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:39,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:40,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:40,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:41,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:41,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:41,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:41,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:41,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:42,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:42,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:42,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:43,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:43,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:43,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:43,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:20:43,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:20:43,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5073 [2020-10-28 19:20:43,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:43,535 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:43,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:20:43,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 19:20:43,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-28 19:20:43,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:20:44,650 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:20:44,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:20:44,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:44,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:44,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:44,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:20:44,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:20:44,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 19:20:44,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:44,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:44,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:20:44,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:20:44,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:20:44,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-28 19:20:44,965 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 19:20:44,965 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608015005] [2020-10-28 19:20:44,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:20:44,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:20:44,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559507051] [2020-10-28 19:20:44,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:20:44,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:20:44,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:20:44,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:20:45,002 INFO L87 Difference]: Start difference. First operand 799 states. Second operand 4 states. [2020-10-28 19:20:45,867 WARN L193 SmtUtils]: Spent 751.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-28 19:20:51,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:20:51,805 INFO L93 Difference]: Finished difference Result 1496 states and 2629 transitions. [2020-10-28 19:20:51,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:20:51,808 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-28 19:20:51,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:20:51,836 INFO L225 Difference]: With dead ends: 1496 [2020-10-28 19:20:51,836 INFO L226 Difference]: Without dead ends: 1286 [2020-10-28 19:20:51,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:20:51,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2020-10-28 19:20:52,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1283. [2020-10-28 19:20:52,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1283 states. [2020-10-28 19:20:52,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2006 transitions. [2020-10-28 19:20:52,053 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2006 transitions. Word has length 325 [2020-10-28 19:20:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:20:52,061 INFO L481 AbstractCegarLoop]: Abstraction has 1283 states and 2006 transitions. [2020-10-28 19:20:52,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:20:52,062 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2006 transitions. [2020-10-28 19:20:52,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:20:52,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:20:52,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:20:52,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:20:52,072 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:20:52,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:20:52,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1948349173, now seen corresponding path program 1 times [2020-10-28 19:20:52,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:20:52,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697509766] [2020-10-28 19:20:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:20:52,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:52,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:52,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:52,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:53,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:53,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:53,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:54,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:54,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:54,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:54,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:54,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:54,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:55,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:55,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:55,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:55,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:57,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:57,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:20:57,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:20:57,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:20:57,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:57,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:20:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-28 19:20:57,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 221 [2020-10-28 19:20:57,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:20:58,261 WARN L193 SmtUtils]: Spent 881.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:20:58,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:20:58,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:58,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:58,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:58,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:20:58,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:20:58,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:20:58,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:58,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:58,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:20:58,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:20:58,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:20:58,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:20:58,489 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 19:20:58,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697509766] [2020-10-28 19:20:58,490 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:20:58,490 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:20:58,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663836327] [2020-10-28 19:20:58,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:20:58,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:20:58,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:20:58,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:20:58,494 INFO L87 Difference]: Start difference. First operand 1283 states and 2006 transitions. Second operand 4 states. [2020-10-28 19:20:59,243 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-28 19:21:04,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:04,198 INFO L93 Difference]: Finished difference Result 2615 states and 4121 transitions. [2020-10-28 19:21:04,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:21:04,199 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-28 19:21:04,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:04,214 INFO L225 Difference]: With dead ends: 2615 [2020-10-28 19:21:04,214 INFO L226 Difference]: Without dead ends: 2250 [2020-10-28 19:21:04,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2020-10-28 19:21:04,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2247. [2020-10-28 19:21:04,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2247 states. [2020-10-28 19:21:04,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3508 transitions. [2020-10-28 19:21:04,346 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3508 transitions. Word has length 325 [2020-10-28 19:21:04,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:04,347 INFO L481 AbstractCegarLoop]: Abstraction has 2247 states and 3508 transitions. [2020-10-28 19:21:04,347 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:21:04,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3508 transitions. [2020-10-28 19:21:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:21:04,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:04,357 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:04,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:21:04,357 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:04,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:04,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1821978594, now seen corresponding path program 1 times [2020-10-28 19:21:04,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:04,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420830893] [2020-10-28 19:21:04,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:04,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:04,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:04,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:04,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:05,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:05,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:05,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:05,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:05,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:06,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:06,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:06,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:06,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:06,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:06,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:07,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:07,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:09,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:09,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:21:09,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:21:09,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-28 19:21:09,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:09,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:09,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:21:09,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-28 19:21:09,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 228 [2020-10-28 19:21:09,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:10,378 WARN L193 SmtUtils]: Spent 724.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:21:10,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:10,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:10,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:10,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:10,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:10,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-28 19:21:10,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:10,406 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:10,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:10,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:10,590 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 19:21:10,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420830893] [2020-10-28 19:21:10,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:10,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:21:10,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067111712] [2020-10-28 19:21:10,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:21:10,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:10,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:21:10,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:21:10,593 INFO L87 Difference]: Start difference. First operand 2247 states and 3508 transitions. Second operand 4 states. [2020-10-28 19:21:11,380 WARN L193 SmtUtils]: Spent 732.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-28 19:21:16,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:16,222 INFO L93 Difference]: Finished difference Result 4825 states and 7596 transitions. [2020-10-28 19:21:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:21:16,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-28 19:21:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:16,245 INFO L225 Difference]: With dead ends: 4825 [2020-10-28 19:21:16,245 INFO L226 Difference]: Without dead ends: 4142 [2020-10-28 19:21:16,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:16,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2020-10-28 19:21:16,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4139. [2020-10-28 19:21:16,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4139 states. [2020-10-28 19:21:16,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 6448 transitions. [2020-10-28 19:21:16,393 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 6448 transitions. Word has length 325 [2020-10-28 19:21:16,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:16,394 INFO L481 AbstractCegarLoop]: Abstraction has 4139 states and 6448 transitions. [2020-10-28 19:21:16,394 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:21:16,394 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 6448 transitions. [2020-10-28 19:21:16,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:21:16,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:16,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:16,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:21:16,406 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash 479714806, now seen corresponding path program 1 times [2020-10-28 19:21:16,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:16,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [249829078] [2020-10-28 19:21:16,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:16,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:16,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:16,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:16,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:17,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:17,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:17,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:17,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:17,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:18,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:18,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:18,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:18,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:18,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:18,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:18,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:19,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:21,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:21,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:21:21,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:21:21,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 19:21:21,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:21,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:21,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:21:21,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-28 19:21:21,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 235 [2020-10-28 19:21:21,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:22,406 WARN L193 SmtUtils]: Spent 720.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:21:22,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:22,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:22,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:22,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:22,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:22,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:21:22,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:22,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:22,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:22,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:22,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:22,617 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 19:21:22,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [249829078] [2020-10-28 19:21:22,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:22,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:21:22,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672328019] [2020-10-28 19:21:22,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:21:22,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:22,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:21:22,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:21:22,620 INFO L87 Difference]: Start difference. First operand 4139 states and 6448 transitions. Second operand 4 states. [2020-10-28 19:21:23,396 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-28 19:21:28,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:28,466 INFO L93 Difference]: Finished difference Result 9129 states and 14344 transitions. [2020-10-28 19:21:28,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:21:28,468 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-28 19:21:28,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:28,508 INFO L225 Difference]: With dead ends: 9129 [2020-10-28 19:21:28,509 INFO L226 Difference]: Without dead ends: 7854 [2020-10-28 19:21:28,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:28,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7854 states. [2020-10-28 19:21:28,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7854 to 7851. [2020-10-28 19:21:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7851 states. [2020-10-28 19:21:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7851 states to 7851 states and 12200 transitions. [2020-10-28 19:21:28,862 INFO L78 Accepts]: Start accepts. Automaton has 7851 states and 12200 transitions. Word has length 325 [2020-10-28 19:21:28,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:28,863 INFO L481 AbstractCegarLoop]: Abstraction has 7851 states and 12200 transitions. [2020-10-28 19:21:28,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:21:28,863 INFO L276 IsEmpty]: Start isEmpty. Operand 7851 states and 12200 transitions. [2020-10-28 19:21:28,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:21:28,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:28,886 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:28,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:21:28,887 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:28,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:28,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1772496259, now seen corresponding path program 1 times [2020-10-28 19:21:28,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:28,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774445989] [2020-10-28 19:21:28,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:29,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:29,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:29,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:29,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:29,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:30,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:31,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:31,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:34,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:34,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:21:34,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:21:34,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:21:34,108 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:34,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:34,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:21:34,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:21:34,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-28 19:21:34,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:35,063 WARN L193 SmtUtils]: Spent 694.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:21:35,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:35,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:35,095 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:35,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:35,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:35,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:21:35,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:35,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:35,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:35,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:35,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:35,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:35,401 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 19:21:35,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774445989] [2020-10-28 19:21:35,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:35,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:21:35,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886417776] [2020-10-28 19:21:35,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:21:35,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:35,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:21:35,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:35,404 INFO L87 Difference]: Start difference. First operand 7851 states and 12200 transitions. Second operand 5 states. [2020-10-28 19:21:43,463 WARN L193 SmtUtils]: Spent 729.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:21:45,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:21:45,838 INFO L93 Difference]: Finished difference Result 23205 states and 36018 transitions. [2020-10-28 19:21:45,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:21:45,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-28 19:21:45,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:21:45,903 INFO L225 Difference]: With dead ends: 23205 [2020-10-28 19:21:45,903 INFO L226 Difference]: Without dead ends: 15387 [2020-10-28 19:21:45,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:21:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15387 states. [2020-10-28 19:21:46,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15387 to 15384. [2020-10-28 19:21:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15384 states. [2020-10-28 19:21:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15384 states to 15384 states and 23767 transitions. [2020-10-28 19:21:46,672 INFO L78 Accepts]: Start accepts. Automaton has 15384 states and 23767 transitions. Word has length 325 [2020-10-28 19:21:46,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:21:46,673 INFO L481 AbstractCegarLoop]: Abstraction has 15384 states and 23767 transitions. [2020-10-28 19:21:46,673 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:21:46,673 INFO L276 IsEmpty]: Start isEmpty. Operand 15384 states and 23767 transitions. [2020-10-28 19:21:46,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 19:21:46,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:21:46,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:21:46,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:21:46,705 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:21:46,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:21:46,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1038869709, now seen corresponding path program 1 times [2020-10-28 19:21:46,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:21:46,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [465638682] [2020-10-28 19:21:46,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:21:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:46,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:46,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:47,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:47,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:47,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:47,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:47,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:47,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:48,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:48,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:48,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:48,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:48,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:48,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:48,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:51,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:51,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 19:21:51,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:21:51,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-28 19:21:51,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:51,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:21:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:21:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 176 [2020-10-28 19:21:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:52,616 WARN L193 SmtUtils]: Spent 685.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:21:52,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:21:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:21:52,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:21:52,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:21:52,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:21:52,642 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:21:52,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:21:52,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:21:52,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:21:52,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:21:52,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:21:52,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:21:52,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:21:52,844 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 19:21:52,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [465638682] [2020-10-28 19:21:52,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:21:52,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:21:52,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089651667] [2020-10-28 19:21:52,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:21:52,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:21:52,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:21:52,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:21:52,846 INFO L87 Difference]: Start difference. First operand 15384 states and 23767 transitions. Second operand 5 states. [2020-10-28 19:22:00,974 WARN L193 SmtUtils]: Spent 791.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:22:03,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:03,685 INFO L93 Difference]: Finished difference Result 45442 states and 70105 transitions. [2020-10-28 19:22:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:22:03,686 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 327 [2020-10-28 19:22:03,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:03,753 INFO L225 Difference]: With dead ends: 45442 [2020-10-28 19:22:03,754 INFO L226 Difference]: Without dead ends: 30150 [2020-10-28 19:22:03,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:22:03,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30150 states. [2020-10-28 19:22:05,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30150 to 30147. [2020-10-28 19:22:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30147 states. [2020-10-28 19:22:05,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30147 states to 30147 states and 46293 transitions. [2020-10-28 19:22:05,410 INFO L78 Accepts]: Start accepts. Automaton has 30147 states and 46293 transitions. Word has length 327 [2020-10-28 19:22:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:05,411 INFO L481 AbstractCegarLoop]: Abstraction has 30147 states and 46293 transitions. [2020-10-28 19:22:05,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:22:05,411 INFO L276 IsEmpty]: Start isEmpty. Operand 30147 states and 46293 transitions. [2020-10-28 19:22:05,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-28 19:22:05,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:05,468 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:05,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:22:05,468 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:05,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:05,469 INFO L82 PathProgramCache]: Analyzing trace with hash -952214032, now seen corresponding path program 1 times [2020-10-28 19:22:05,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:05,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810679005] [2020-10-28 19:22:05,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:05,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:05,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:05,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:05,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:06,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:06,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:06,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:06,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:06,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:06,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:06,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:06,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:06,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:08,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:08,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:08,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:09,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:09,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:10,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:10,538 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 337 [2020-10-28 19:22:10,538 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 19:22:10,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 19:22:10,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:10,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:10,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:22:10,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:22:10,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-28 19:22:10,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:11,347 WARN L193 SmtUtils]: Spent 691.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:22:11,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:22:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:11,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:11,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:11,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:22:11,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:22:11,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:22:11,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:11,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:11,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:22:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:22:11,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:22:11,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:11,524 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 19:22:11,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810679005] [2020-10-28 19:22:11,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:22:11,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:22:11,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843122614] [2020-10-28 19:22:11,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:22:11,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:22:11,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:22:11,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:22:11,527 INFO L87 Difference]: Start difference. First operand 30147 states and 46293 transitions. Second operand 5 states. [2020-10-28 19:22:19,828 WARN L193 SmtUtils]: Spent 805.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:22:22,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:22,700 INFO L93 Difference]: Finished difference Result 89031 states and 136486 transitions. [2020-10-28 19:22:22,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:22:22,701 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2020-10-28 19:22:22,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:22,828 INFO L225 Difference]: With dead ends: 89031 [2020-10-28 19:22:22,828 INFO L226 Difference]: Without dead ends: 58972 [2020-10-28 19:22:22,886 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:22:22,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58972 states. [2020-10-28 19:22:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58972 to 58969. [2020-10-28 19:22:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58969 states. [2020-10-28 19:22:26,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58969 states to 58969 states and 89873 transitions. [2020-10-28 19:22:26,229 INFO L78 Accepts]: Start accepts. Automaton has 58969 states and 89873 transitions. Word has length 329 [2020-10-28 19:22:26,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:26,229 INFO L481 AbstractCegarLoop]: Abstraction has 58969 states and 89873 transitions. [2020-10-28 19:22:26,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:22:26,230 INFO L276 IsEmpty]: Start isEmpty. Operand 58969 states and 89873 transitions. [2020-10-28 19:22:26,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-28 19:22:26,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:26,455 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:26,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:22:26,456 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:26,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1774946548, now seen corresponding path program 1 times [2020-10-28 19:22:26,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:26,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141899430] [2020-10-28 19:22:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:26,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:26,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:26,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:26,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:26,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:27,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:27,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:27,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:27,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:27,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:27,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:27,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:27,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:28,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:28,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:29,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:31,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:31,534 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 339 [2020-10-28 19:22:31,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:22:31,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 19:22:31,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:31,534 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:31,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:22:31,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:22:31,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-28 19:22:31,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:32,403 WARN L193 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:22:32,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:22:32,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:32,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:32,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:22:32,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:22:32,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:22:32,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:22:32,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:22:32,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:22:32,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:22:32,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:22:32,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:22:32,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:22:32,645 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 19:22:32,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141899430] [2020-10-28 19:22:32,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:22:32,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:22:32,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395483625] [2020-10-28 19:22:32,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:22:32,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:22:32,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:22:32,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:22:32,649 INFO L87 Difference]: Start difference. First operand 58969 states and 89873 transitions. Second operand 5 states. [2020-10-28 19:22:43,465 WARN L193 SmtUtils]: Spent 794.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:22:47,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:22:47,772 INFO L93 Difference]: Finished difference Result 174101 states and 264893 transitions. [2020-10-28 19:22:47,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:22:47,773 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-28 19:22:47,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:22:48,008 INFO L225 Difference]: With dead ends: 174101 [2020-10-28 19:22:48,009 INFO L226 Difference]: Without dead ends: 115350 [2020-10-28 19:22:48,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:22:48,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115350 states. [2020-10-28 19:22:55,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115350 to 115347. [2020-10-28 19:22:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115347 states. [2020-10-28 19:22:55,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115347 states to 115347 states and 174523 transitions. [2020-10-28 19:22:55,726 INFO L78 Accepts]: Start accepts. Automaton has 115347 states and 174523 transitions. Word has length 331 [2020-10-28 19:22:55,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:22:55,727 INFO L481 AbstractCegarLoop]: Abstraction has 115347 states and 174523 transitions. [2020-10-28 19:22:55,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:22:55,727 INFO L276 IsEmpty]: Start isEmpty. Operand 115347 states and 174523 transitions. [2020-10-28 19:22:55,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-28 19:22:55,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:22:55,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:22:55,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:22:55,839 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:22:55,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:22:55,840 INFO L82 PathProgramCache]: Analyzing trace with hash 3842101, now seen corresponding path program 1 times [2020-10-28 19:22:55,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:22:55,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702349044] [2020-10-28 19:22:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:22:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:22:55,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:55,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:56,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:56,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:56,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:56,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:56,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:56,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:56,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:56,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:56,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:56,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:22:56,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:00,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:00,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 341 [2020-10-28 19:23:00,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 19:23:00,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-28 19:23:00,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:00,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:00,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:23:00,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:23:00,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-28 19:23:00,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:01,802 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:23:01,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:01,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:01,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:01,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:01,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:01,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:01,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 19:23:01,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:01,830 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:01,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:01,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:01,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:01,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:01,988 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 19:23:01,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702349044] [2020-10-28 19:23:01,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:01,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:23:01,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275348574] [2020-10-28 19:23:01,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:23:01,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:01,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:23:01,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:23:01,991 INFO L87 Difference]: Start difference. First operand 115347 states and 174523 transitions. Second operand 5 states. [2020-10-28 19:23:18,619 WARN L193 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-28 19:23:25,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:23:25,509 INFO L93 Difference]: Finished difference Result 340269 states and 513864 transitions. [2020-10-28 19:23:25,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:23:25,510 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 333 [2020-10-28 19:23:25,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:23:26,108 INFO L225 Difference]: With dead ends: 340269 [2020-10-28 19:23:26,108 INFO L226 Difference]: Without dead ends: 225706 [2020-10-28 19:23:26,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:23:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225706 states. [2020-10-28 19:23:42,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225706 to 225703. [2020-10-28 19:23:42,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225703 states. [2020-10-28 19:23:42,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225703 states to 225703 states and 339052 transitions. [2020-10-28 19:23:42,864 INFO L78 Accepts]: Start accepts. Automaton has 225703 states and 339052 transitions. Word has length 333 [2020-10-28 19:23:42,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:23:42,865 INFO L481 AbstractCegarLoop]: Abstraction has 225703 states and 339052 transitions. [2020-10-28 19:23:42,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:23:42,865 INFO L276 IsEmpty]: Start isEmpty. Operand 225703 states and 339052 transitions. [2020-10-28 19:23:43,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-28 19:23:43,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:23:43,056 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 19:23:43,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:23:43,057 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:23:43,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:23:43,058 INFO L82 PathProgramCache]: Analyzing trace with hash 2023150898, now seen corresponding path program 1 times [2020-10-28 19:23:43,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:23:43,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281831743] [2020-10-28 19:23:43,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:23:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:43,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:43,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:43,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:43,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:43,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:43,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:43,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:43,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:43,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:44,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:44,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:44,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:47,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:47,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:48,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:48,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-28 19:23:48,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 19:23:48,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 19:23:48,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:48,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:48,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:23:48,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:23:48,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-28 19:23:48,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:48,979 WARN L193 SmtUtils]: Spent 714.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:23:48,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:23:48,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:23:48,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:23:48,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:23:48,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:23:48,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:23:48,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 19:23:48,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:23:48,998 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:23:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:23:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:23:48,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:23:48,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:23:49,138 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 19:23:49,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281831743] [2020-10-28 19:23:49,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:23:49,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:23:49,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370280893] [2020-10-28 19:23:49,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:23:49,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:23:49,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:23:49,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:23:49,141 INFO L87 Difference]: Start difference. First operand 225703 states and 339052 transitions. Second operand 5 states.