/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 00:38:01,884 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 00:38:01,887 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 00:38:01,924 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 00:38:01,925 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 00:38:01,927 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 00:38:01,928 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 00:38:01,931 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 00:38:01,933 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 00:38:01,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 00:38:01,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 00:38:01,938 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 00:38:01,938 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 00:38:01,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 00:38:01,943 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 00:38:01,946 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 00:38:01,948 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 00:38:01,953 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 00:38:01,959 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 00:38:01,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 00:38:01,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 00:38:01,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 00:38:01,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 00:38:01,973 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 00:38:01,984 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 00:38:01,984 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 00:38:01,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 00:38:01,994 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 00:38:01,994 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 00:38:01,996 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 00:38:01,997 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 00:38:01,998 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 00:38:01,999 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 00:38:02,001 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 00:38:02,002 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 00:38:02,002 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 00:38:02,003 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 00:38:02,003 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 00:38:02,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 00:38:02,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 00:38:02,005 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 00:38:02,006 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 00:38:02,069 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 00:38:02,070 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 00:38:02,075 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 00:38:02,075 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 00:38:02,075 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 00:38:02,076 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 00:38:02,077 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 00:38:02,077 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 00:38:02,077 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 00:38:02,077 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 00:38:02,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 00:38:02,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 00:38:02,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 00:38:02,079 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 00:38:02,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 00:38:02,080 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 00:38:02,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 00:38:02,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 00:38:02,081 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 00:38:02,081 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 00:38:02,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 00:38:02,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:38:02,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 00:38:02,082 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 00:38:02,082 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 00:38:02,082 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 00:38:02,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 00:38:02,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 00:38:02,083 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 00:38:02,083 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-28 00:38:02,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 00:38:02,575 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 00:38:02,581 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 00:38:02,583 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 00:38:02,583 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 00:38:02,585 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 00:38:02,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5976852a/a464ebcfb0a34a71b528a5245097c8cc/FLAG5a3b7dbb8 [2020-10-28 00:38:03,555 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 00:38:03,556 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 00:38:03,590 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5976852a/a464ebcfb0a34a71b528a5245097c8cc/FLAG5a3b7dbb8 [2020-10-28 00:38:03,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f5976852a/a464ebcfb0a34a71b528a5245097c8cc [2020-10-28 00:38:03,646 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 00:38:03,652 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 00:38:03,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 00:38:03,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 00:38:03,658 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 00:38:03,659 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:38:03" (1/1) ... [2020-10-28 00:38:03,662 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@640e959 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:38:03, skipping insertion in model container [2020-10-28 00:38:03,663 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 12:38:03" (1/1) ... [2020-10-28 00:38:03,671 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 00:38:03,878 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 00:38:05,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:38:05,134 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 00:38:05,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 00:38:05,758 INFO L208 MainTranslator]: Completed translation [2020-10-28 00:38:05,760 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:38:05 WrapperNode [2020-10-28 00:38:05,761 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 00:38:05,762 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 00:38:05,762 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 00:38:05,763 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 00:38:05,778 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:38:05" (1/1) ... [2020-10-28 00:38:05,780 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:38:05" (1/1) ... [2020-10-28 00:38:05,842 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:38:05" (1/1) ... [2020-10-28 00:38:05,842 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:38:05" (1/1) ... [2020-10-28 00:38:05,912 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:38:05" (1/1) ... [2020-10-28 00:38:05,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:38:05" (1/1) ... [2020-10-28 00:38:05,975 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:38:05" (1/1) ... [2020-10-28 00:38:05,997 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 00:38:05,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 00:38:05,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 00:38:05,998 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 00:38:05,999 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:38:05" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 00:38:06,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 00:38:06,088 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 00:38:06,089 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 00:38:06,089 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 00:38:06,089 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 00:38:06,090 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 00:38:06,090 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 00:38:06,091 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 00:38:06,091 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 00:38:06,091 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 00:38:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 00:38:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 00:38:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 00:38:06,092 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 00:38:06,093 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 00:38:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 00:38:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 00:38:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 00:38:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 00:38:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-28 00:38:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 00:38:06,094 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 00:38:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 00:38:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 00:38:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 00:38:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 00:38:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 00:38:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 00:38:06,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 00:38:12,049 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 00:38:12,049 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 00:38:12,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:38:12 BoogieIcfgContainer [2020-10-28 00:38:12,054 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 00:38:12,056 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 00:38:12,056 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 00:38:12,060 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 00:38:12,060 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 12:38:03" (1/3) ... [2020-10-28 00:38:12,061 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25943ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:38:12, skipping insertion in model container [2020-10-28 00:38:12,061 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 12:38:05" (2/3) ... [2020-10-28 00:38:12,062 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25943ab4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 12:38:12, skipping insertion in model container [2020-10-28 00:38:12,062 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 12:38:12" (3/3) ... [2020-10-28 00:38:12,064 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.1.ufo.BOUNDED-10.pals.c.v+nlh-reducer.c [2020-10-28 00:38:12,077 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 00:38:12,084 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 00:38:12,097 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 00:38:12,133 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 00:38:12,133 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 00:38:12,133 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 00:38:12,134 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 00:38:12,134 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 00:38:12,134 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 00:38:12,134 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 00:38:12,134 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 00:38:12,179 INFO L276 IsEmpty]: Start isEmpty. Operand 1533 states. [2020-10-28 00:38:12,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-28 00:38:12,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:12,221 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:38:12,222 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:12,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:12,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1601469669, now seen corresponding path program 1 times [2020-10-28 00:38:12,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:12,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746377830] [2020-10-28 00:38:12,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:12,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:13,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:13,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:13,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:14,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:14,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:15,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:15,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:16,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:16,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:17,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:17,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:17,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-28 00:38:17,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 00:38:17,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-28 00:38:17,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:17,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:38:17,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-28 00:38:17,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:38:17,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 00:38:18,543 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 8 [2020-10-28 00:38:20,873 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:38:20,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:20,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:20,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:20,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:20,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:20,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:20,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-28 00:38:20,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:20,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:20,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:20,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:20,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:38:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:38:21,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746377830] [2020-10-28 00:38:21,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:21,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:38:21,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918021945] [2020-10-28 00:38:21,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:38:21,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:21,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:38:21,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:38:21,361 INFO L87 Difference]: Start difference. First operand 1533 states. Second operand 4 states. [2020-10-28 00:38:40,574 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:38:42,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:38:42,927 INFO L93 Difference]: Finished difference Result 3095 states and 5398 transitions. [2020-10-28 00:38:42,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:38:42,932 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 377 [2020-10-28 00:38:42,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:38:42,980 INFO L225 Difference]: With dead ends: 3095 [2020-10-28 00:38:42,980 INFO L226 Difference]: Without dead ends: 2340 [2020-10-28 00:38:42,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:38:43,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2020-10-28 00:38:43,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2293. [2020-10-28 00:38:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2293 states. [2020-10-28 00:38:43,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2293 states to 2293 states and 3833 transitions. [2020-10-28 00:38:43,259 INFO L78 Accepts]: Start accepts. Automaton has 2293 states and 3833 transitions. Word has length 377 [2020-10-28 00:38:43,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:38:43,267 INFO L481 AbstractCegarLoop]: Abstraction has 2293 states and 3833 transitions. [2020-10-28 00:38:43,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:38:43,267 INFO L276 IsEmpty]: Start isEmpty. Operand 2293 states and 3833 transitions. [2020-10-28 00:38:43,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-28 00:38:43,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:38:43,291 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:38:43,292 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 00:38:43,292 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:38:43,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:38:43,295 INFO L82 PathProgramCache]: Analyzing trace with hash -87690678, now seen corresponding path program 1 times [2020-10-28 00:38:43,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:38:43,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933423610] [2020-10-28 00:38:43,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:38:43,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:43,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:43,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:43,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:44,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:44,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:45,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:45,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:45,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:46,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:46,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:46,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:48,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:48,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-28 00:38:48,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:38:48,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-28 00:38:48,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:38:48,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-28 00:38:48,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:38:48,561 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:38:51,064 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:38:51,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:38:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:38:51,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:38:51,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:38:51,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:38:51,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:38:51,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-28 00:38:51,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:38:51,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:38:51,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:38:51,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:38:51,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:38:51,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:38:51,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933423610] [2020-10-28 00:38:51,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:38:51,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:38:51,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353419663] [2020-10-28 00:38:51,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:38:51,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:38:51,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:38:51,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:38:51,345 INFO L87 Difference]: Start difference. First operand 2293 states and 3833 transitions. Second operand 4 states. [2020-10-28 00:38:53,912 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification that was a NOOP. DAG size: 432 [2020-10-28 00:39:12,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:12,930 INFO L93 Difference]: Finished difference Result 5301 states and 8750 transitions. [2020-10-28 00:39:12,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:39:12,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 377 [2020-10-28 00:39:12,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:12,956 INFO L225 Difference]: With dead ends: 5301 [2020-10-28 00:39:12,956 INFO L226 Difference]: Without dead ends: 3928 [2020-10-28 00:39:12,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:39:12,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2020-10-28 00:39:13,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3717. [2020-10-28 00:39:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3717 states. [2020-10-28 00:39:13,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3717 states to 3717 states and 6143 transitions. [2020-10-28 00:39:13,123 INFO L78 Accepts]: Start accepts. Automaton has 3717 states and 6143 transitions. Word has length 377 [2020-10-28 00:39:13,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:13,124 INFO L481 AbstractCegarLoop]: Abstraction has 3717 states and 6143 transitions. [2020-10-28 00:39:13,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:39:13,124 INFO L276 IsEmpty]: Start isEmpty. Operand 3717 states and 6143 transitions. [2020-10-28 00:39:13,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-28 00:39:13,137 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:13,138 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:39:13,138 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 00:39:13,138 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:13,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:13,139 INFO L82 PathProgramCache]: Analyzing trace with hash -1383548934, now seen corresponding path program 1 times [2020-10-28 00:39:13,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:13,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452554865] [2020-10-28 00:39:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:13,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:13,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:13,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:13,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:14,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:14,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:15,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:16,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:16,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:18,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:18,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-28 00:39:18,340 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 00:39:18,340 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-28 00:39:18,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:18,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:39:18,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 209 [2020-10-28 00:39:18,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:39:18,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:20,878 WARN L193 SmtUtils]: Spent 2.23 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:39:20,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:20,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:20,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:20,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:20,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:20,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:20,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-28 00:39:20,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:20,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:20,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:20,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:20,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:39:21,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452554865] [2020-10-28 00:39:21,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:21,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:39:21,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14761256] [2020-10-28 00:39:21,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:39:21,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:21,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:39:21,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:39:21,151 INFO L87 Difference]: Start difference. First operand 3717 states and 6143 transitions. Second operand 4 states. [2020-10-28 00:39:23,620 WARN L193 SmtUtils]: Spent 2.37 s on a formula simplification that was a NOOP. DAG size: 432 [2020-10-28 00:39:41,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:39:41,261 INFO L93 Difference]: Finished difference Result 8443 states and 13819 transitions. [2020-10-28 00:39:41,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:39:41,262 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 377 [2020-10-28 00:39:41,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:39:41,290 INFO L225 Difference]: With dead ends: 8443 [2020-10-28 00:39:41,291 INFO L226 Difference]: Without dead ends: 6308 [2020-10-28 00:39:41,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:39:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6308 states. [2020-10-28 00:39:41,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6308 to 5889. [2020-10-28 00:39:41,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5889 states. [2020-10-28 00:39:41,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5889 states to 5889 states and 9627 transitions. [2020-10-28 00:39:41,547 INFO L78 Accepts]: Start accepts. Automaton has 5889 states and 9627 transitions. Word has length 377 [2020-10-28 00:39:41,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:39:41,548 INFO L481 AbstractCegarLoop]: Abstraction has 5889 states and 9627 transitions. [2020-10-28 00:39:41,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:39:41,548 INFO L276 IsEmpty]: Start isEmpty. Operand 5889 states and 9627 transitions. [2020-10-28 00:39:41,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-28 00:39:41,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:39:41,566 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:39:41,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 00:39:41,567 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:39:41,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:39:41,567 INFO L82 PathProgramCache]: Analyzing trace with hash 713098509, now seen corresponding path program 1 times [2020-10-28 00:39:41,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:39:41,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954875691] [2020-10-28 00:39:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:39:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:41,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:41,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:42,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:43,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:43,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:43,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:43,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:44,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:45,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:46,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:46,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:46,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:46,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:46,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-28 00:39:46,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 00:39:46,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5134 [2020-10-28 00:39:46,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:46,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:39:46,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 170 [2020-10-28 00:39:46,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 00:39:46,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:49,287 WARN L193 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:39:49,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:39:49,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:39:49,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:39:49,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:39:49,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:39:49,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:39:49,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 00:39:49,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:39:49,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:39:49,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:39:49,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:39:49,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:39:49,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:39:49,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954875691] [2020-10-28 00:39:49,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:39:49,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:39:49,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612860650] [2020-10-28 00:39:49,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:39:49,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:39:49,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:39:49,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:39:49,523 INFO L87 Difference]: Start difference. First operand 5889 states and 9627 transitions. Second operand 4 states. [2020-10-28 00:39:51,964 WARN L193 SmtUtils]: Spent 2.34 s on a formula simplification that was a NOOP. DAG size: 428 [2020-10-28 00:40:07,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:40:07,472 INFO L93 Difference]: Finished difference Result 9207 states and 15051 transitions. [2020-10-28 00:40:07,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:40:07,472 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 377 [2020-10-28 00:40:07,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:40:07,493 INFO L225 Difference]: With dead ends: 9207 [2020-10-28 00:40:07,493 INFO L226 Difference]: Without dead ends: 5324 [2020-10-28 00:40:07,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:40:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5324 states. [2020-10-28 00:40:07,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5324 to 5321. [2020-10-28 00:40:07,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5321 states. [2020-10-28 00:40:07,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5321 states to 5321 states and 8723 transitions. [2020-10-28 00:40:07,725 INFO L78 Accepts]: Start accepts. Automaton has 5321 states and 8723 transitions. Word has length 377 [2020-10-28 00:40:07,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:40:07,726 INFO L481 AbstractCegarLoop]: Abstraction has 5321 states and 8723 transitions. [2020-10-28 00:40:07,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:40:07,726 INFO L276 IsEmpty]: Start isEmpty. Operand 5321 states and 8723 transitions. [2020-10-28 00:40:07,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-28 00:40:07,738 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:40:07,738 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:40:07,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 00:40:07,739 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:40:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:40:07,739 INFO L82 PathProgramCache]: Analyzing trace with hash 982487728, now seen corresponding path program 1 times [2020-10-28 00:40:07,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:40:07,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081128883] [2020-10-28 00:40:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:40:07,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:07,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:08,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:08,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:08,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:08,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:09,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:09,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:09,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:09,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:10,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:11,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:11,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:12,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:12,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:12,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:12,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:12,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:12,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-28 00:40:12,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 00:40:12,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5061 [2020-10-28 00:40:12,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:12,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:40:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 217 [2020-10-28 00:40:12,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:40:12,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:15,346 WARN L193 SmtUtils]: Spent 2.29 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:40:15,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:15,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:15,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:15,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:15,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:15,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:15,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 00:40:15,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:15,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:15,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:15,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:15,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:15,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:40:15,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081128883] [2020-10-28 00:40:15,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:15,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:40:15,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428809873] [2020-10-28 00:40:15,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:40:15,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:15,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:40:15,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:40:15,632 INFO L87 Difference]: Start difference. First operand 5321 states and 8723 transitions. Second operand 4 states. [2020-10-28 00:40:33,345 WARN L193 SmtUtils]: Spent 2.40 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:40:35,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:40:35,288 INFO L93 Difference]: Finished difference Result 12599 states and 20523 transitions. [2020-10-28 00:40:35,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:40:35,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 377 [2020-10-28 00:40:35,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:40:35,344 INFO L225 Difference]: With dead ends: 12599 [2020-10-28 00:40:35,344 INFO L226 Difference]: Without dead ends: 8956 [2020-10-28 00:40:35,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:40:35,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8956 states. [2020-10-28 00:40:35,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8956 to 8697. [2020-10-28 00:40:35,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8697 states. [2020-10-28 00:40:35,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8697 states to 8697 states and 14119 transitions. [2020-10-28 00:40:35,742 INFO L78 Accepts]: Start accepts. Automaton has 8697 states and 14119 transitions. Word has length 377 [2020-10-28 00:40:35,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:40:35,743 INFO L481 AbstractCegarLoop]: Abstraction has 8697 states and 14119 transitions. [2020-10-28 00:40:35,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:40:35,743 INFO L276 IsEmpty]: Start isEmpty. Operand 8697 states and 14119 transitions. [2020-10-28 00:40:35,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-28 00:40:35,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:40:35,762 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:40:35,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 00:40:35,762 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:40:35,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:40:35,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2111919228, now seen corresponding path program 1 times [2020-10-28 00:40:35,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:40:35,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007789375] [2020-10-28 00:40:35,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:40:35,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:35,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:36,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:36,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:36,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:36,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:36,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:37,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:37,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:37,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:37,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:38,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:39,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:39,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:39,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:40,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:40,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:40,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:40,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:40,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-28 00:40:40,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 00:40:40,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-28 00:40:40,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:40,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:40:40,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 239 [2020-10-28 00:40:40,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:40:40,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:43,331 WARN L193 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:40:43,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:40:43,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:40:43,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:40:43,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:40:43,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:40:43,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:40:43,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 00:40:43,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:40:43,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:40:43,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:40:43,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:40:43,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:40:43,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:40:43,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007789375] [2020-10-28 00:40:43,524 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:40:43,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:40:43,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282286920] [2020-10-28 00:40:43,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:40:43,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:40:43,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:40:43,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:40:43,526 INFO L87 Difference]: Start difference. First operand 8697 states and 14119 transitions. Second operand 4 states. [2020-10-28 00:41:01,480 WARN L193 SmtUtils]: Spent 2.48 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:41:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:03,361 INFO L93 Difference]: Finished difference Result 15495 states and 25193 transitions. [2020-10-28 00:41:03,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:41:03,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 377 [2020-10-28 00:41:03,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:03,385 INFO L225 Difference]: With dead ends: 15495 [2020-10-28 00:41:03,385 INFO L226 Difference]: Without dead ends: 8700 [2020-10-28 00:41:03,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:41:03,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8700 states. [2020-10-28 00:41:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8700 to 8697. [2020-10-28 00:41:03,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8697 states. [2020-10-28 00:41:03,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8697 states to 8697 states and 14091 transitions. [2020-10-28 00:41:03,756 INFO L78 Accepts]: Start accepts. Automaton has 8697 states and 14091 transitions. Word has length 377 [2020-10-28 00:41:03,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:03,757 INFO L481 AbstractCegarLoop]: Abstraction has 8697 states and 14091 transitions. [2020-10-28 00:41:03,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:41:03,757 INFO L276 IsEmpty]: Start isEmpty. Operand 8697 states and 14091 transitions. [2020-10-28 00:41:03,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-28 00:41:03,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:03,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:41:03,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 00:41:03,778 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:03,779 INFO L82 PathProgramCache]: Analyzing trace with hash 967785223, now seen corresponding path program 1 times [2020-10-28 00:41:03,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:03,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798697457] [2020-10-28 00:41:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:03,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:04,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:04,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:04,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:04,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:04,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:05,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:05,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:05,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:05,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:06,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:06,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:07,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:07,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:07,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:07,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:08,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:08,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-28 00:41:08,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 00:41:08,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 00:41:08,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:08,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:41:08,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 255 [2020-10-28 00:41:08,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 00:41:08,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 00:41:11,567 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:41:11,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:11,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:11,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:11,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:11,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:11,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:11,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 00:41:11,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:11,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:11,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:11,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:11,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:11,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:41:11,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798697457] [2020-10-28 00:41:11,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:11,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:41:11,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834819472] [2020-10-28 00:41:11,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:41:11,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:11,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:41:11,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:41:11,735 INFO L87 Difference]: Start difference. First operand 8697 states and 14091 transitions. Second operand 4 states. [2020-10-28 00:41:30,350 WARN L193 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 430 [2020-10-28 00:41:32,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 00:41:32,356 INFO L93 Difference]: Finished difference Result 22247 states and 35895 transitions. [2020-10-28 00:41:32,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 00:41:32,357 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 377 [2020-10-28 00:41:32,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 00:41:32,386 INFO L225 Difference]: With dead ends: 22247 [2020-10-28 00:41:32,386 INFO L226 Difference]: Without dead ends: 15140 [2020-10-28 00:41:32,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 00:41:32,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2020-10-28 00:41:33,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 14513. [2020-10-28 00:41:33,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14513 states. [2020-10-28 00:41:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14513 states to 14513 states and 23227 transitions. [2020-10-28 00:41:33,054 INFO L78 Accepts]: Start accepts. Automaton has 14513 states and 23227 transitions. Word has length 377 [2020-10-28 00:41:33,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 00:41:33,055 INFO L481 AbstractCegarLoop]: Abstraction has 14513 states and 23227 transitions. [2020-10-28 00:41:33,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 00:41:33,055 INFO L276 IsEmpty]: Start isEmpty. Operand 14513 states and 23227 transitions. [2020-10-28 00:41:33,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-28 00:41:33,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 00:41:33,082 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 00:41:33,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 00:41:33,082 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 00:41:33,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 00:41:33,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1992328456, now seen corresponding path program 1 times [2020-10-28 00:41:33,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 00:41:33,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782525431] [2020-10-28 00:41:33,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 00:41:33,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:33,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:33,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:33,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:33,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:33,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:34,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:34,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:34,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:34,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:34,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:35,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:36,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:36,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:36,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:36,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:36,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:37,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:37,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:38,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:38,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-28 00:41:38,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 00:41:38,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-28 00:41:38,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 00:41:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-10-28 00:41:38,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 00:41:38,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:40,677 WARN L193 SmtUtils]: Spent 2.36 s on a formula simplification that was a NOOP. DAG size: 424 [2020-10-28 00:41:40,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 00:41:40,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 00:41:40,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 00:41:40,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 00:41:40,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 00:41:40,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 00:41:40,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 00:41:40,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-28 00:41:40,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 00:41:40,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 00:41:40,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 00:41:40,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 00:41:40,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 00:41:40,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782525431] [2020-10-28 00:41:40,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 00:41:40,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 00:41:40,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456406493] [2020-10-28 00:41:40,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 00:41:40,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 00:41:40,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 00:41:40,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 00:41:40,835 INFO L87 Difference]: Start difference. First operand 14513 states and 23227 transitions. Second operand 4 states. [2020-10-28 00:41:43,326 WARN L193 SmtUtils]: Spent 2.38 s on a formula simplification that was a NOOP. DAG size: 428