/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 13:05:02,304 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 13:05:02,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 13:05:02,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 13:05:02,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 13:05:02,348 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 13:05:02,350 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 13:05:02,352 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 13:05:02,355 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 13:05:02,356 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 13:05:02,357 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 13:05:02,359 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 13:05:02,359 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 13:05:02,361 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 13:05:02,362 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 13:05:02,363 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 13:05:02,365 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 13:05:02,366 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 13:05:02,368 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 13:05:02,370 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 13:05:02,372 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 13:05:02,383 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 13:05:02,384 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 13:05:02,385 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 13:05:02,389 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 13:05:02,389 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 13:05:02,390 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 13:05:02,391 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 13:05:02,392 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 13:05:02,393 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 13:05:02,393 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 13:05:02,394 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 13:05:02,395 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 13:05:02,396 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 13:05:02,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 13:05:02,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 13:05:02,399 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 13:05:02,399 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 13:05:02,399 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 13:05:02,420 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 13:05:02,430 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 13:05:02,431 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 [2020-10-29 13:05:02,501 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 13:05:02,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 13:05:02,508 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 13:05:02,508 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 13:05:02,509 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 13:05:02,509 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 13:05:02,509 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 13:05:02,509 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 13:05:02,510 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 13:05:02,510 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 13:05:02,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 13:05:02,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 13:05:02,512 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 13:05:02,512 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 13:05:02,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 13:05:02,512 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 13:05:02,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 13:05:02,513 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 13:05:02,513 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 13:05:02,513 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 13:05:02,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 13:05:02,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 13:05:02,514 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 13:05:02,515 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 13:05:02,515 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 13:05:02,515 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 13:05:02,515 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 13:05:02,516 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 13:05:02,516 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 13:05:02,516 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 13:05:02,966 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 13:05:02,997 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 13:05:03,001 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 13:05:03,002 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 13:05:03,003 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 13:05:03,004 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:05:03,094 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60e21c7e0/cbddb1631a454844991449c1795fb412/FLAG552b3868d [2020-10-29 13:05:03,948 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 13:05:03,949 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:05:03,987 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60e21c7e0/cbddb1631a454844991449c1795fb412/FLAG552b3868d [2020-10-29 13:05:04,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/60e21c7e0/cbddb1631a454844991449c1795fb412 [2020-10-29 13:05:04,514 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 13:05:04,521 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 13:05:04,524 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 13:05:04,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 13:05:04,529 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 13:05:04,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:05:04" (1/1) ... [2020-10-29 13:05:04,535 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab1df43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:04, skipping insertion in model container [2020-10-29 13:05:04,535 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 01:05:04" (1/1) ... [2020-10-29 13:05:04,545 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 13:05:04,699 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 13:05:06,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:05:06,312 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 13:05:07,162 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 13:05:07,191 INFO L208 MainTranslator]: Completed translation [2020-10-29 13:05:07,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:07 WrapperNode [2020-10-29 13:05:07,192 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 13:05:07,193 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 13:05:07,193 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 13:05:07,193 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 13:05:07,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:07" (1/1) ... [2020-10-29 13:05:07,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:07" (1/1) ... [2020-10-29 13:05:07,244 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:07" (1/1) ... [2020-10-29 13:05:07,245 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:07" (1/1) ... [2020-10-29 13:05:07,315 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:07" (1/1) ... [2020-10-29 13:05:07,407 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:07" (1/1) ... [2020-10-29 13:05:07,427 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:07" (1/1) ... [2020-10-29 13:05:07,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 13:05:07,446 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 13:05:07,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 13:05:07,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 13:05:07,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:07" (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 [2020-10-29 13:05:07,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 13:05:07,535 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 13:05:07,536 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 13:05:07,536 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-29 13:05:07,536 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 13:05:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 13:05:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 13:05:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 13:05:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 13:05:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-29 13:05:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-29 13:05:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-29 13:05:07,539 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-29 13:05:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-29 13:05:07,540 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-29 13:05:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-29 13:05:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-29 13:05:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-29 13:05:07,541 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-29 13:05:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-29 13:05:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-29 13:05:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 13:05:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 13:05:07,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 13:05:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 13:05:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 13:05:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 13:05:07,543 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 13:05:10,938 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 13:05:10,939 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-29 13:05:10,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:05:10 BoogieIcfgContainer [2020-10-29 13:05:10,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 13:05:10,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 13:05:10,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 13:05:10,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 13:05:10,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 01:05:04" (1/3) ... [2020-10-29 13:05:10,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462b2624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:05:10, skipping insertion in model container [2020-10-29 13:05:10,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 01:05:07" (2/3) ... [2020-10-29 13:05:10,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@462b2624 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 01:05:10, skipping insertion in model container [2020-10-29 13:05:10,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 01:05:10" (3/3) ... [2020-10-29 13:05:10,951 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.4.4.ufo.BOUNDED-8.pals.c.v+lhb-reducer.c [2020-10-29 13:05:10,963 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 13:05:10,969 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 13:05:10,982 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 13:05:11,015 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 13:05:11,016 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 13:05:11,016 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 13:05:11,016 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 13:05:11,016 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 13:05:11,016 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 13:05:11,016 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 13:05:11,017 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 13:05:11,051 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states. [2020-10-29 13:05:11,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-29 13:05:11,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:05:11,082 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] [2020-10-29 13:05:11,083 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:05:11,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:05:11,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1702593958, now seen corresponding path program 1 times [2020-10-29 13:05:11,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:05:11,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548644878] [2020-10-29 13:05:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:05:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:11,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:12,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:13,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:13,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:13,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:14,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:14,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:14,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:14,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:15,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:15,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:16,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:16,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:16,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:16,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-29 13:05:16,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:05:16,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-29 13:05:16,721 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:16,722 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:05:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-29 13:05:16,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 207 [2020-10-29 13:05:16,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 13:05:17,815 WARN L193 SmtUtils]: Spent 709.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:05:17,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:05:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:17,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:17,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:17,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:05:17,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:05:17,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-29 13:05:17,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:17,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:17,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:05:17,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:05:17,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:05:17,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:05:18,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:05:18,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548644878] [2020-10-29 13:05:18,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:05:18,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:05:18,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548997048] [2020-10-29 13:05:18,093 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:05:18,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:05:18,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:05:18,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:05:18,116 INFO L87 Difference]: Start difference. First operand 898 states. Second operand 4 states. [2020-10-29 13:05:19,114 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-29 13:05:27,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:05:27,334 INFO L93 Difference]: Finished difference Result 1547 states and 2790 transitions. [2020-10-29 13:05:27,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:05:27,339 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 299 [2020-10-29 13:05:27,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:05:27,410 INFO L225 Difference]: With dead ends: 1547 [2020-10-29 13:05:27,411 INFO L226 Difference]: Without dead ends: 1297 [2020-10-29 13:05:27,424 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 [2020-10-29 13:05:27,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1297 states. [2020-10-29 13:05:27,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1297 to 1294. [2020-10-29 13:05:27,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1294 states. [2020-10-29 13:05:27,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2002 transitions. [2020-10-29 13:05:27,604 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2002 transitions. Word has length 299 [2020-10-29 13:05:27,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:05:27,612 INFO L481 AbstractCegarLoop]: Abstraction has 1294 states and 2002 transitions. [2020-10-29 13:05:27,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:05:27,612 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2002 transitions. [2020-10-29 13:05:27,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-29 13:05:27,627 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:05:27,629 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 13:05:27,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 13:05:27,633 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:05:27,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:05:27,635 INFO L82 PathProgramCache]: Analyzing trace with hash 590406428, now seen corresponding path program 1 times [2020-10-29 13:05:27,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:05:27,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994610230] [2020-10-29 13:05:27,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:05:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:27,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:28,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:28,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:28,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:29,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:29,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:29,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:29,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:29,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:30,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:30,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:30,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:30,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:32,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:32,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-29 13:05:32,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:05:32,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:05:32,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:32,831 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:32,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:05:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 89 [2020-10-29 13:05:32,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 212 [2020-10-29 13:05:32,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:05:33,980 WARN L193 SmtUtils]: Spent 916.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:05:33,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:05:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:33,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:34,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:34,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:05:34,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:05:34,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 13:05:34,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:34,027 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:05:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:05:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:05:34,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:05:34,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:05:34,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [994610230] [2020-10-29 13:05:34,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:05:34,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:05:34,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166820675] [2020-10-29 13:05:34,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:05:34,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:05:34,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:05:34,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:05:34,245 INFO L87 Difference]: Start difference. First operand 1294 states and 2002 transitions. Second operand 4 states. [2020-10-29 13:05:35,160 WARN L193 SmtUtils]: Spent 854.00 ms on a formula simplification that was a NOOP. DAG size: 347 [2020-10-29 13:05:41,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:05:41,755 INFO L93 Difference]: Finished difference Result 2495 states and 3903 transitions. [2020-10-29 13:05:41,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:05:41,761 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 299 [2020-10-29 13:05:41,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:05:41,775 INFO L225 Difference]: With dead ends: 2495 [2020-10-29 13:05:41,775 INFO L226 Difference]: Without dead ends: 2181 [2020-10-29 13:05:41,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:05:41,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2181 states. [2020-10-29 13:05:41,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2181 to 2178. [2020-10-29 13:05:41,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2178 states. [2020-10-29 13:05:41,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 3387 transitions. [2020-10-29 13:05:41,864 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 3387 transitions. Word has length 299 [2020-10-29 13:05:41,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:05:41,865 INFO L481 AbstractCegarLoop]: Abstraction has 2178 states and 3387 transitions. [2020-10-29 13:05:41,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:05:41,866 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 3387 transitions. [2020-10-29 13:05:41,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2020-10-29 13:05:41,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:05:41,874 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] [2020-10-29 13:05:41,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 13:05:41,875 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:05:41,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:05:41,875 INFO L82 PathProgramCache]: Analyzing trace with hash 579909363, now seen corresponding path program 1 times [2020-10-29 13:05:41,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:05:41,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528318746] [2020-10-29 13:05:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:05:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:42,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:42,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:43,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:43,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:43,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:43,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:43,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:43,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:44,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:44,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:44,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:45,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:45,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:47,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:47,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 307 [2020-10-29 13:05:47,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:05:47,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 13:05:47,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:47,134 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:47,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:05:47,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:05:47,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-29 13:05:47,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:05:48,397 WARN L193 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:05:48,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:05:48,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:05:48,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:05:48,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:05:48,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:05:48,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:05:48,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:05:48,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:05:48,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:05:48,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:05:48,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:05:48,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:05:48,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:05:48,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:05:48,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528318746] [2020-10-29 13:05:48,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:05:48,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:05:48,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503014076] [2020-10-29 13:05:48,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:05:48,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:05:48,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:05:48,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:05:48,656 INFO L87 Difference]: Start difference. First operand 2178 states and 3387 transitions. Second operand 5 states. [2020-10-29 13:05:57,385 WARN L193 SmtUtils]: Spent 943.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:05:59,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:05:59,813 INFO L93 Difference]: Finished difference Result 6444 states and 10012 transitions. [2020-10-29 13:05:59,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:05:59,814 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 299 [2020-10-29 13:05:59,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:05:59,836 INFO L225 Difference]: With dead ends: 6444 [2020-10-29 13:05:59,836 INFO L226 Difference]: Without dead ends: 4279 [2020-10-29 13:05:59,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:05:59,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2020-10-29 13:06:00,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 4133. [2020-10-29 13:06:00,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4133 states. [2020-10-29 13:06:00,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 6389 transitions. [2020-10-29 13:06:00,027 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 6389 transitions. Word has length 299 [2020-10-29 13:06:00,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:00,027 INFO L481 AbstractCegarLoop]: Abstraction has 4133 states and 6389 transitions. [2020-10-29 13:06:00,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:06:00,028 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 6389 transitions. [2020-10-29 13:06:00,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-29 13:06:00,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:00,039 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] [2020-10-29 13:06:00,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 13:06:00,039 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:00,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:00,040 INFO L82 PathProgramCache]: Analyzing trace with hash -893064053, now seen corresponding path program 1 times [2020-10-29 13:06:00,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:00,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [386153103] [2020-10-29 13:06:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:00,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:00,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:00,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:00,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:01,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:01,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:01,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:01,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:01,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:01,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:02,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:02,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:02,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:05,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:05,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 309 [2020-10-29 13:06:05,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:06:05,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-29 13:06:05,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:05,171 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:05,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:05,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:06:05,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 168 [2020-10-29 13:06:05,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:06,317 WARN L193 SmtUtils]: Spent 869.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:06:06,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:06,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:06,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:06,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:06,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:06,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:06:06,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:06,351 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:06,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:06,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:06,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:06,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:06,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:06,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [386153103] [2020-10-29 13:06:06,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:06,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:06,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389298284] [2020-10-29 13:06:06,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:06,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:06,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:06,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:06,577 INFO L87 Difference]: Start difference. First operand 4133 states and 6389 transitions. Second operand 5 states. [2020-10-29 13:06:16,000 WARN L193 SmtUtils]: Spent 895.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:06:18,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:18,609 INFO L93 Difference]: Finished difference Result 12187 states and 18810 transitions. [2020-10-29 13:06:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:06:18,612 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 301 [2020-10-29 13:06:18,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:18,661 INFO L225 Difference]: With dead ends: 12187 [2020-10-29 13:06:18,661 INFO L226 Difference]: Without dead ends: 8142 [2020-10-29 13:06:18,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:06:18,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8142 states. [2020-10-29 13:06:19,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8142 to 7976. [2020-10-29 13:06:19,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7976 states. [2020-10-29 13:06:19,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7976 states to 7976 states and 12271 transitions. [2020-10-29 13:06:19,156 INFO L78 Accepts]: Start accepts. Automaton has 7976 states and 12271 transitions. Word has length 301 [2020-10-29 13:06:19,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:19,156 INFO L481 AbstractCegarLoop]: Abstraction has 7976 states and 12271 transitions. [2020-10-29 13:06:19,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:06:19,156 INFO L276 IsEmpty]: Start isEmpty. Operand 7976 states and 12271 transitions. [2020-10-29 13:06:19,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-29 13:06:19,174 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:19,175 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] [2020-10-29 13:06:19,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 13:06:19,175 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:19,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:19,176 INFO L82 PathProgramCache]: Analyzing trace with hash -230805834, now seen corresponding path program 1 times [2020-10-29 13:06:19,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:19,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958660394] [2020-10-29 13:06:19,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:19,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:19,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:19,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:19,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:19,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:19,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:20,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:20,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:20,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:20,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:20,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:20,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:21,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:22,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:22,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:24,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:24,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-29 13:06:24,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-29 13:06:24,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-29 13:06:24,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:24,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:24,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:06:24,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:06:24,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 13:06:24,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:06:25,342 WARN L193 SmtUtils]: Spent 871.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:06:25,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:25,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:25,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:25,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:25,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:25,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-29 13:06:25,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:25,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:25,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:25,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:25,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:25,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:25,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:25,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958660394] [2020-10-29 13:06:25,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:25,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:06:25,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782997147] [2020-10-29 13:06:25,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:06:25,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:25,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:06:25,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:25,510 INFO L87 Difference]: Start difference. First operand 7976 states and 12271 transitions. Second operand 5 states. [2020-10-29 13:06:35,515 WARN L193 SmtUtils]: Spent 915.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:06:38,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:38,455 INFO L93 Difference]: Finished difference Result 23376 states and 35883 transitions. [2020-10-29 13:06:38,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:06:38,456 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 303 [2020-10-29 13:06:38,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:38,520 INFO L225 Difference]: With dead ends: 23376 [2020-10-29 13:06:38,520 INFO L226 Difference]: Without dead ends: 15614 [2020-10-29 13:06:38,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:06:38,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15614 states. [2020-10-29 13:06:39,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15614 to 15448. [2020-10-29 13:06:39,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15448 states. [2020-10-29 13:06:39,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15448 states to 15448 states and 23633 transitions. [2020-10-29 13:06:39,791 INFO L78 Accepts]: Start accepts. Automaton has 15448 states and 23633 transitions. Word has length 303 [2020-10-29 13:06:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:06:39,792 INFO L481 AbstractCegarLoop]: Abstraction has 15448 states and 23633 transitions. [2020-10-29 13:06:39,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:06:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 15448 states and 23633 transitions. [2020-10-29 13:06:39,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-29 13:06:39,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:06:39,825 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] [2020-10-29 13:06:39,825 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 13:06:39,825 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:06:39,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:06:39,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1175765373, now seen corresponding path program 1 times [2020-10-29 13:06:39,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:06:39,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227087643] [2020-10-29 13:06:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:06:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:39,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:39,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:40,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:40,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:40,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:40,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:41,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:41,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:41,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:41,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:41,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:42,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:42,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:42,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:42,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:44,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:44,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:44,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-29 13:06:44,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-29 13:06:44,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-29 13:06:44,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:44,895 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:44,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:06:44,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-29 13:06:44,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-29 13:06:44,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:45,920 WARN L193 SmtUtils]: Spent 935.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:06:45,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:06:45,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:06:45,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:06:45,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:06:45,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:06:45,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:06:45,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-29 13:06:45,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:06:45,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:06:45,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:06:45,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:06:45,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:06:45,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:06:46,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:06:46,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227087643] [2020-10-29 13:06:46,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:06:46,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:06:46,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77546925] [2020-10-29 13:06:46,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:06:46,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:06:46,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:06:46,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:06:46,052 INFO L87 Difference]: Start difference. First operand 15448 states and 23633 transitions. Second operand 4 states. [2020-10-29 13:06:56,331 WARN L193 SmtUtils]: Spent 955.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-29 13:06:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:06:59,248 INFO L93 Difference]: Finished difference Result 45276 states and 69093 transitions. [2020-10-29 13:06:59,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:06:59,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 305 [2020-10-29 13:06:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:06:59,321 INFO L225 Difference]: With dead ends: 45276 [2020-10-29 13:06:59,322 INFO L226 Difference]: Without dead ends: 30162 [2020-10-29 13:06:59,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:06:59,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30162 states. [2020-10-29 13:07:02,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30162 to 29996. [2020-10-29 13:07:02,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29996 states. [2020-10-29 13:07:02,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29996 states to 29996 states and 45579 transitions. [2020-10-29 13:07:02,077 INFO L78 Accepts]: Start accepts. Automaton has 29996 states and 45579 transitions. Word has length 305 [2020-10-29 13:07:02,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:07:02,078 INFO L481 AbstractCegarLoop]: Abstraction has 29996 states and 45579 transitions. [2020-10-29 13:07:02,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 13:07:02,078 INFO L276 IsEmpty]: Start isEmpty. Operand 29996 states and 45579 transitions. [2020-10-29 13:07:02,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2020-10-29 13:07:02,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:02,140 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] [2020-10-29 13:07:02,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 13:07:02,141 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:02,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:02,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1517863640, now seen corresponding path program 1 times [2020-10-29 13:07:02,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:02,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347602538] [2020-10-29 13:07:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:02,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:02,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:02,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:02,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:02,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:02,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:02,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:03,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:03,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:03,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:03,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:03,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:03,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:03,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:04,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:06,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:07,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:07,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-29 13:07:07,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-29 13:07:07,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:07:07,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:07,201 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:07,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:07:07,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:07:07,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-29 13:07:07,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 13:07:08,235 WARN L193 SmtUtils]: Spent 894.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:07:08,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:07:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:08,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:08,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:08,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:07:08,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:07:08,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:07:08,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:08,266 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:08,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:07:08,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:07:08,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:07:08,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:08,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:07:08,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347602538] [2020-10-29 13:07:08,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:07:08,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:07:08,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135473918] [2020-10-29 13:07:08,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:07:08,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:07:08,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:07:08,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:07:08,399 INFO L87 Difference]: Start difference. First operand 29996 states and 45579 transitions. Second operand 5 states. [2020-10-29 13:07:19,662 WARN L193 SmtUtils]: Spent 938.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:07:23,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:07:23,181 INFO L93 Difference]: Finished difference Result 88551 states and 134341 transitions. [2020-10-29 13:07:23,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:07:23,182 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 305 [2020-10-29 13:07:23,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:07:23,319 INFO L225 Difference]: With dead ends: 88551 [2020-10-29 13:07:23,320 INFO L226 Difference]: Without dead ends: 58673 [2020-10-29 13:07:23,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:07:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58673 states. [2020-10-29 13:07:26,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58673 to 58543. [2020-10-29 13:07:26,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58543 states. [2020-10-29 13:07:27,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58543 states to 58543 states and 88131 transitions. [2020-10-29 13:07:27,051 INFO L78 Accepts]: Start accepts. Automaton has 58543 states and 88131 transitions. Word has length 305 [2020-10-29 13:07:27,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:07:27,052 INFO L481 AbstractCegarLoop]: Abstraction has 58543 states and 88131 transitions. [2020-10-29 13:07:27,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:07:27,052 INFO L276 IsEmpty]: Start isEmpty. Operand 58543 states and 88131 transitions. [2020-10-29 13:07:27,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-29 13:07:27,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:27,192 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] [2020-10-29 13:07:27,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 13:07:27,192 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1048747095, now seen corresponding path program 1 times [2020-10-29 13:07:27,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:27,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988000803] [2020-10-29 13:07:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:27,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:27,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:27,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:27,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:27,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:27,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:28,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:28,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:28,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:30,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:30,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:30,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:30,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:31,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:31,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:31,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:31,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:32,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:32,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-29 13:07:32,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-29 13:07:32,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-29 13:07:32,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:32,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:32,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-29 13:07:32,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-29 13:07:32,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 112 [2020-10-29 13:07:32,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:33,315 WARN L193 SmtUtils]: Spent 910.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:07:33,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:07:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:33,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:33,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:07:33,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:07:33,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:07:33,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-29 13:07:33,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:07:33,345 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:07:33,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:07:33,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:07:33,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:07:33,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:07:33,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:07:33,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988000803] [2020-10-29 13:07:33,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:07:33,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-29 13:07:33,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743290999] [2020-10-29 13:07:33,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-29 13:07:33,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:07:33,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-29 13:07:33,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:07:33,524 INFO L87 Difference]: Start difference. First operand 58543 states and 88131 transitions. Second operand 5 states. [2020-10-29 13:07:46,678 WARN L193 SmtUtils]: Spent 945.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-10-29 13:07:51,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:07:51,040 INFO L93 Difference]: Finished difference Result 172929 states and 259922 transitions. [2020-10-29 13:07:51,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-29 13:07:51,041 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 307 [2020-10-29 13:07:51,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:07:51,508 INFO L225 Difference]: With dead ends: 172929 [2020-10-29 13:07:51,508 INFO L226 Difference]: Without dead ends: 114579 [2020-10-29 13:07:51,583 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-29 13:07:51,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114579 states. [2020-10-29 13:07:58,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114579 to 114505. [2020-10-29 13:07:58,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114505 states. [2020-10-29 13:07:58,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114505 states to 114505 states and 170836 transitions. [2020-10-29 13:07:58,711 INFO L78 Accepts]: Start accepts. Automaton has 114505 states and 170836 transitions. Word has length 307 [2020-10-29 13:07:58,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 13:07:58,711 INFO L481 AbstractCegarLoop]: Abstraction has 114505 states and 170836 transitions. [2020-10-29 13:07:58,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-29 13:07:58,712 INFO L276 IsEmpty]: Start isEmpty. Operand 114505 states and 170836 transitions. [2020-10-29 13:07:59,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2020-10-29 13:07:59,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 13:07:59,169 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] [2020-10-29 13:07:59,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 13:07:59,169 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 13:07:59,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 13:07:59,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1747263757, now seen corresponding path program 1 times [2020-10-29 13:07:59,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 13:07:59,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1547345532] [2020-10-29 13:07:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 13:07:59,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:07:59,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:59,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:59,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:59,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:59,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:59,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:59,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:59,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:07:59,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:00,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:00,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:00,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:01,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:04,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:04,436 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 317 [2020-10-29 13:08:04,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-29 13:08:04,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-29 13:08:04,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:04,436 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:04,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 13:08:04,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-29 13:08:04,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-29 13:08:04,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:05,446 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 346 [2020-10-29 13:08:05,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 13:08:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 13:08:05,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 13:08:05,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 13:08:05,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 13:08:05,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 13:08:05,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-29 13:08:05,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 13:08:05,473 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 13:08:05,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 13:08:05,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 13:08:05,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 13:08:05,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 13:08:05,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 13:08:05,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1547345532] [2020-10-29 13:08:05,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 13:08:05,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 13:08:05,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155105874] [2020-10-29 13:08:05,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 13:08:05,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 13:08:05,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 13:08:05,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 13:08:05,572 INFO L87 Difference]: Start difference. First operand 114505 states and 170836 transitions. Second operand 4 states. [2020-10-29 13:08:23,829 WARN L193 SmtUtils]: Spent 908.00 ms on a formula simplification that was a NOOP. DAG size: 351 [2020-10-29 13:08:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 13:08:30,328 INFO L93 Difference]: Finished difference Result 336045 states and 499830 transitions. [2020-10-29 13:08:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-29 13:08:30,329 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 309 [2020-10-29 13:08:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 13:08:30,948 INFO L225 Difference]: With dead ends: 336045 [2020-10-29 13:08:30,948 INFO L226 Difference]: Without dead ends: 224371 [2020-10-29 13:08:31,122 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 13:08:31,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224371 states.