/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 05:46:13,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 05:46:13,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 05:46:13,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 05:46:13,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 05:46:13,973 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 05:46:13,974 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 05:46:13,976 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 05:46:13,978 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 05:46:13,979 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 05:46:13,980 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 05:46:13,981 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 05:46:13,982 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 05:46:13,983 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 05:46:13,984 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 05:46:13,985 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 05:46:13,986 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 05:46:13,987 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 05:46:13,989 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 05:46:13,991 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 05:46:13,993 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 05:46:13,994 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 05:46:13,995 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 05:46:13,996 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 05:46:13,998 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 05:46:13,999 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 05:46:13,999 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 05:46:14,001 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 05:46:14,001 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 05:46:14,002 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 05:46:14,003 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 05:46:14,004 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 05:46:14,005 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 05:46:14,006 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 05:46:14,007 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 05:46:14,007 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 05:46:14,008 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 05:46:14,008 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 05:46:14,009 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 05:46:14,010 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 05:46:14,011 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 05:46:14,012 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 [2020-09-25 05:46:14,038 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 05:46:14,039 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 05:46:14,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 05:46:14,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 05:46:14,040 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 05:46:14,041 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 05:46:14,041 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 05:46:14,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 05:46:14,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 05:46:14,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 05:46:14,042 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 05:46:14,042 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 05:46:14,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 05:46:14,042 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 05:46:14,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 05:46:14,043 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 05:46:14,043 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 05:46:14,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 05:46:14,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 05:46:14,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 05:46:14,044 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 05:46:14,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 05:46:14,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 05:46:14,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 05:46:14,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 05:46:14,045 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 05:46:14,045 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 05:46:14,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 05:46:14,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 05:46:14,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true; [2020-09-25 05:46:14,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 05:46:14,510 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 05:46:14,514 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 05:46:14,516 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 05:46:14,517 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 05:46:14,518 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 05:46:14,619 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f00abc8e/5a08ac6ddb144af88d8ac493b4ceecca/FLAGd7067848b [2020-09-25 05:46:15,284 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 05:46:15,285 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 05:46:15,301 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f00abc8e/5a08ac6ddb144af88d8ac493b4ceecca/FLAGd7067848b [2020-09-25 05:46:15,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f00abc8e/5a08ac6ddb144af88d8ac493b4ceecca [2020-09-25 05:46:15,515 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 05:46:15,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 05:46:15,523 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 05:46:15,523 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 05:46:15,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 05:46:15,530 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:46:15" (1/1) ... [2020-09-25 05:46:15,534 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336ce4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:15, skipping insertion in model container [2020-09-25 05:46:15,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 05:46:15" (1/1) ... [2020-09-25 05:46:15,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 05:46:15,636 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 05:46:16,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:46:16,131 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 05:46:16,407 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 05:46:16,430 INFO L208 MainTranslator]: Completed translation [2020-09-25 05:46:16,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:16 WrapperNode [2020-09-25 05:46:16,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 05:46:16,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 05:46:16,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 05:46:16,432 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 05:46:16,446 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:16" (1/1) ... [2020-09-25 05:46:16,447 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:16" (1/1) ... [2020-09-25 05:46:16,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:16" (1/1) ... [2020-09-25 05:46:16,466 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:16" (1/1) ... [2020-09-25 05:46:16,493 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:16" (1/1) ... [2020-09-25 05:46:16,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:16" (1/1) ... [2020-09-25 05:46:16,520 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:16" (1/1) ... [2020-09-25 05:46:16,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 05:46:16,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 05:46:16,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 05:46:16,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 05:46:16,531 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:16" (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 [2020-09-25 05:46:16,645 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 05:46:16,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 05:46:16,646 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 05:46:16,646 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 05:46:16,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 05:46:16,647 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-09-25 05:46:16,648 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-09-25 05:46:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-09-25 05:46:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-09-25 05:46:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 05:46:16,649 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 05:46:16,650 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-09-25 05:46:16,650 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-09-25 05:46:16,650 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-09-25 05:46:16,650 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-09-25 05:46:16,651 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-09-25 05:46:16,652 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 05:46:16,652 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-25 05:46:16,652 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 05:46:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 05:46:16,653 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 05:46:18,318 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 05:46:18,318 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-25 05:46:18,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:46:18 BoogieIcfgContainer [2020-09-25 05:46:18,331 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 05:46:18,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 05:46:18,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 05:46:18,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 05:46:18,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 05:46:15" (1/3) ... [2020-09-25 05:46:18,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc1404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:46:18, skipping insertion in model container [2020-09-25 05:46:18,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 05:46:16" (2/3) ... [2020-09-25 05:46:18,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc1404 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 05:46:18, skipping insertion in model container [2020-09-25 05:46:18,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 05:46:18" (3/3) ... [2020-09-25 05:46:18,342 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-09-25 05:46:18,354 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 05:46:18,365 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 05:46:18,388 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 05:46:18,425 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 05:46:18,425 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 05:46:18,425 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 05:46:18,426 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 05:46:18,426 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 05:46:18,426 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 05:46:18,426 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 05:46:18,426 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 05:46:18,467 INFO L276 IsEmpty]: Start isEmpty. Operand 813 states. [2020-09-25 05:46:18,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 408 [2020-09-25 05:46:18,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:46:18,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:46:18,501 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:46:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:46:18,510 INFO L82 PathProgramCache]: Analyzing trace with hash -361300248, now seen corresponding path program 1 times [2020-09-25 05:46:18,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:46:18,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051577344] [2020-09-25 05:46:18,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:46:19,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:19,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:19,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:19,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:20,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:20,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:20,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:20,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:22,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:23,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:24,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:24,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 414 [2020-09-25 05:46:24,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:46:24,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5038 [2020-09-25 05:46:24,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:24,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:24,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:46:24,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 159 [2020-09-25 05:46:24,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-09-25 05:46:24,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 05:46:24,791 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 05:46:24,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:46:24,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:24,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:24,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:24,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 05:46:24,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:46:24,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-09-25 05:46:24,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:24,848 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:24,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:46:24,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:46:24,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:46:24,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:46:25,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:46:25,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051577344] [2020-09-25 05:46:25,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:46:25,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:46:25,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027691188] [2020-09-25 05:46:25,151 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:46:25,151 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:46:25,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:46:25,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:46:25,173 INFO L87 Difference]: Start difference. First operand 813 states. Second operand 5 states. [2020-09-25 05:46:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:46:30,596 INFO L93 Difference]: Finished difference Result 2068 states and 2752 transitions. [2020-09-25 05:46:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-25 05:46:30,599 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 407 [2020-09-25 05:46:30,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:46:30,643 INFO L225 Difference]: With dead ends: 2068 [2020-09-25 05:46:30,644 INFO L226 Difference]: Without dead ends: 1234 [2020-09-25 05:46:30,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:46:30,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1234 states. [2020-09-25 05:46:30,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1234 to 1232. [2020-09-25 05:46:30,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1232 states. [2020-09-25 05:46:30,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 1499 transitions. [2020-09-25 05:46:30,822 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 1499 transitions. Word has length 407 [2020-09-25 05:46:30,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:46:30,827 INFO L479 AbstractCegarLoop]: Abstraction has 1232 states and 1499 transitions. [2020-09-25 05:46:30,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:46:30,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 1499 transitions. [2020-09-25 05:46:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 409 [2020-09-25 05:46:30,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:46:30,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:46:30,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 05:46:30,844 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:46:30,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:46:30,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1185743993, now seen corresponding path program 1 times [2020-09-25 05:46:30,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:46:30,846 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375706301] [2020-09-25 05:46:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:46:30,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:30,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:31,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:31,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:31,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:31,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:31,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:32,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:34,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:35,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:35,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:35,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 415 [2020-09-25 05:46:35,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 05:46:35,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-09-25 05:46:35,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:35,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:35,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:46:35,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 164 [2020-09-25 05:46:35,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-09-25 05:46:35,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-09-25 05:46:36,338 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 05:46:36,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:46:36,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:36,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:36,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:36,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 05:46:36,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:46:36,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-09-25 05:46:36,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:36,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:36,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:46:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:46:36,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:46:36,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:46:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:46:36,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375706301] [2020-09-25 05:46:36,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:46:36,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:46:36,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225786894] [2020-09-25 05:46:36,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:46:36,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:46:36,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:46:36,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:46:36,704 INFO L87 Difference]: Start difference. First operand 1232 states and 1499 transitions. Second operand 4 states. [2020-09-25 05:46:39,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:46:39,433 INFO L93 Difference]: Finished difference Result 3339 states and 4125 transitions. [2020-09-25 05:46:39,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:46:39,434 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 408 [2020-09-25 05:46:39,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:46:39,447 INFO L225 Difference]: With dead ends: 3339 [2020-09-25 05:46:39,447 INFO L226 Difference]: Without dead ends: 2294 [2020-09-25 05:46:39,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:46:39,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2020-09-25 05:46:39,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1235. [2020-09-25 05:46:39,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1235 states. [2020-09-25 05:46:39,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1503 transitions. [2020-09-25 05:46:39,511 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1503 transitions. Word has length 408 [2020-09-25 05:46:39,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:46:39,512 INFO L479 AbstractCegarLoop]: Abstraction has 1235 states and 1503 transitions. [2020-09-25 05:46:39,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:46:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1503 transitions. [2020-09-25 05:46:39,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-25 05:46:39,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:46:39,521 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:46:39,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 05:46:39,522 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:46:39,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:46:39,522 INFO L82 PathProgramCache]: Analyzing trace with hash -801557755, now seen corresponding path program 1 times [2020-09-25 05:46:39,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:46:39,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1721030066] [2020-09-25 05:46:39,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:46:39,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:39,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:39,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:39,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:40,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:40,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:40,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:40,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:42,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:42,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:43,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:44,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:44,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-25 05:46:44,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 05:46:44,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-09-25 05:46:44,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:44,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 05:46:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 169 [2020-09-25 05:46:44,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 160 [2020-09-25 05:46:44,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:46:45,061 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 05:46:45,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:46:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:45,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:45,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:45,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 05:46:45,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:46:45,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 44 [2020-09-25 05:46:45,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:45,116 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:46:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:46:45,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:46:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:46:45,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:46:45,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1721030066] [2020-09-25 05:46:45,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:46:45,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 05:46:45,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988987540] [2020-09-25 05:46:45,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 05:46:45,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:46:45,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 05:46:45,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:46:45,631 INFO L87 Difference]: Start difference. First operand 1235 states and 1503 transitions. Second operand 4 states. [2020-09-25 05:46:50,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:46:50,137 INFO L93 Difference]: Finished difference Result 3077 states and 3800 transitions. [2020-09-25 05:46:50,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 05:46:50,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 409 [2020-09-25 05:46:50,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:46:50,149 INFO L225 Difference]: With dead ends: 3077 [2020-09-25 05:46:50,149 INFO L226 Difference]: Without dead ends: 2219 [2020-09-25 05:46:50,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 05:46:50,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2219 states. [2020-09-25 05:46:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2219 to 2217. [2020-09-25 05:46:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2217 states. [2020-09-25 05:46:50,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2217 states to 2217 states and 2712 transitions. [2020-09-25 05:46:50,227 INFO L78 Accepts]: Start accepts. Automaton has 2217 states and 2712 transitions. Word has length 409 [2020-09-25 05:46:50,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:46:50,227 INFO L479 AbstractCegarLoop]: Abstraction has 2217 states and 2712 transitions. [2020-09-25 05:46:50,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 05:46:50,228 INFO L276 IsEmpty]: Start isEmpty. Operand 2217 states and 2712 transitions. [2020-09-25 05:46:50,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 410 [2020-09-25 05:46:50,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:46:50,237 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:46:50,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 05:46:50,238 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:46:50,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:46:50,238 INFO L82 PathProgramCache]: Analyzing trace with hash -146505083, now seen corresponding path program 1 times [2020-09-25 05:46:50,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:46:50,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426204562] [2020-09-25 05:46:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:46:50,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:50,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:50,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:50,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:50,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:50,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:51,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:51,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:52,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:54,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:55,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:55,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:55,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 416 [2020-09-25 05:46:55,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 05:46:55,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-09-25 05:46:55,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:55,368 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 05:46:55,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 161 [2020-09-25 05:46:55,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-09-25 05:46:55,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 05:46:55,853 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-09-25 05:46:55,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 05:46:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:46:55,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:46:55,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 05:46:55,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-25 05:46:55,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 05:46:55,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 41 [2020-09-25 05:46:55,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-09-25 05:46:55,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-09-25 05:46:55,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 05:46:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 05:46:55,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 05:46:55,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 05:46:56,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 05:46:56,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426204562] [2020-09-25 05:46:56,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 05:46:56,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 05:46:56,231 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108315857] [2020-09-25 05:46:56,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 05:46:56,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 05:46:56,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 05:46:56,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 05:46:56,234 INFO L87 Difference]: Start difference. First operand 2217 states and 2712 transitions. Second operand 5 states. [2020-09-25 05:47:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 05:47:00,895 INFO L93 Difference]: Finished difference Result 3883 states and 4792 transitions. [2020-09-25 05:47:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 05:47:00,896 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 409 [2020-09-25 05:47:00,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 05:47:00,908 INFO L225 Difference]: With dead ends: 3883 [2020-09-25 05:47:00,908 INFO L226 Difference]: Without dead ends: 2389 [2020-09-25 05:47:00,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 05:47:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2389 states. [2020-09-25 05:47:00,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2389 to 2218. [2020-09-25 05:47:00,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2218 states. [2020-09-25 05:47:00,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2218 states to 2218 states and 2714 transitions. [2020-09-25 05:47:00,997 INFO L78 Accepts]: Start accepts. Automaton has 2218 states and 2714 transitions. Word has length 409 [2020-09-25 05:47:00,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 05:47:00,998 INFO L479 AbstractCegarLoop]: Abstraction has 2218 states and 2714 transitions. [2020-09-25 05:47:00,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 05:47:00,998 INFO L276 IsEmpty]: Start isEmpty. Operand 2218 states and 2714 transitions. [2020-09-25 05:47:01,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 411 [2020-09-25 05:47:01,008 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 05:47:01,009 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 05:47:01,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 05:47:01,009 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 05:47:01,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 05:47:01,010 INFO L82 PathProgramCache]: Analyzing trace with hash -870506186, now seen corresponding path program 1 times [2020-09-25 05:47:01,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 05:47:01,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [98130510] [2020-09-25 05:47:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 05:47:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 05:47:01,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:01,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:01,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:01,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:01,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:01,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 05:47:01,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking...