/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 19:17:46,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 19:17:46,920 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 19:17:46,959 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 19:17:46,960 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 19:17:46,961 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 19:17:46,963 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 19:17:46,965 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 19:17:46,967 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 19:17:46,968 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 19:17:46,970 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 19:17:46,971 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 19:17:46,972 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 19:17:46,973 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 19:17:46,974 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 19:17:46,976 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 19:17:46,977 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 19:17:46,978 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 19:17:46,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 19:17:46,982 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 19:17:46,984 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 19:17:46,989 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 19:17:46,991 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 19:17:46,992 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 19:17:46,995 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 19:17:46,996 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 19:17:46,996 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 19:17:46,997 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 19:17:46,998 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 19:17:46,999 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 19:17:46,999 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 19:17:47,000 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 19:17:47,001 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 19:17:47,002 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 19:17:47,003 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 19:17:47,003 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 19:17:47,004 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 19:17:47,004 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 19:17:47,005 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 19:17:47,006 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 19:17:47,007 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 19:17:47,009 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 19:17:47,038 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 19:17:47,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 19:17:47,040 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 19:17:47,040 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 19:17:47,040 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 19:17:47,040 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 19:17:47,041 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 19:17:47,041 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 19:17:47,041 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 19:17:47,041 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 19:17:47,041 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 19:17:47,041 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 19:17:47,042 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 19:17:47,042 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 19:17:47,042 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 19:17:47,042 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 19:17:47,042 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 19:17:47,043 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 19:17:47,043 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 19:17:47,043 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 19:17:47,043 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 19:17:47,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:17:47,044 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 19:17:47,044 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 19:17:47,044 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 19:17:47,044 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 19:17:47,044 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 19:17:47,045 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 19:17:47,045 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 19:17:47,045 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 19:17:47,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 19:17:47,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 19:17:47,463 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 19:17:47,465 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 19:17:47,465 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 19:17:47,466 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:17:47,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbe117b87/ab376622013e4bb6b7c82d00c0d2d18d/FLAGb9bfacb84 [2020-10-28 19:17:48,395 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 19:17:48,396 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:17:48,432 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbe117b87/ab376622013e4bb6b7c82d00c0d2d18d/FLAGb9bfacb84 [2020-10-28 19:17:48,575 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbe117b87/ab376622013e4bb6b7c82d00c0d2d18d [2020-10-28 19:17:48,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 19:17:48,589 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 19:17:48,596 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 19:17:48,596 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 19:17:48,600 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 19:17:48,601 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:17:48" (1/1) ... [2020-10-28 19:17:48,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51d8162f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:48, skipping insertion in model container [2020-10-28 19:17:48,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 07:17:48" (1/1) ... [2020-10-28 19:17:48,619 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 19:17:48,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 19:17:49,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:17:49,984 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 19:17:50,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 19:17:50,431 INFO L208 MainTranslator]: Completed translation [2020-10-28 19:17:50,431 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:50 WrapperNode [2020-10-28 19:17:50,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 19:17:50,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 19:17:50,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 19:17:50,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 19:17:50,448 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:50" (1/1) ... [2020-10-28 19:17:50,449 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:50" (1/1) ... [2020-10-28 19:17:50,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:50" (1/1) ... [2020-10-28 19:17:50,477 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:50" (1/1) ... [2020-10-28 19:17:50,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:50" (1/1) ... [2020-10-28 19:17:50,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:50" (1/1) ... [2020-10-28 19:17:50,637 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:50" (1/1) ... [2020-10-28 19:17:50,653 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 19:17:50,654 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 19:17:50,655 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 19:17:50,655 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 19:17:50,656 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 19:17:50,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 19:17:50,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 19:17:50,737 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 19:17:50,737 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 19:17:50,738 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 19:17:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 19:17:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 19:17:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 19:17:50,738 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 19:17:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-28 19:17:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-28 19:17:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-28 19:17:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-28 19:17:50,739 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 19:17:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-28 19:17:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-28 19:17:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-28 19:17:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-28 19:17:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-28 19:17:50,740 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-28 19:17:50,741 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-28 19:17:50,741 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-28 19:17:50,741 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 19:17:50,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 19:17:50,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 19:17:50,741 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 19:17:50,741 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 19:17:50,742 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 19:17:50,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 19:17:53,625 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 19:17:53,625 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-28 19:17:53,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:17:53 BoogieIcfgContainer [2020-10-28 19:17:53,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 19:17:53,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 19:17:53,631 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 19:17:53,634 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 19:17:53,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 07:17:48" (1/3) ... [2020-10-28 19:17:53,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23bf31fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:17:53, skipping insertion in model container [2020-10-28 19:17:53,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 07:17:50" (2/3) ... [2020-10-28 19:17:53,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23bf31fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 07:17:53, skipping insertion in model container [2020-10-28 19:17:53,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 07:17:53" (3/3) ... [2020-10-28 19:17:53,638 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-28 19:17:53,652 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 19:17:53,658 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 19:17:53,676 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 19:17:53,711 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 19:17:53,711 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 19:17:53,711 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 19:17:53,711 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 19:17:53,712 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 19:17:53,712 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 19:17:53,712 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 19:17:53,712 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 19:17:53,748 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states. [2020-10-28 19:17:53,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 19:17:53,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:17:53,778 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] [2020-10-28 19:17:53,779 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:17:53,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:17:53,786 INFO L82 PathProgramCache]: Analyzing trace with hash -626420471, now seen corresponding path program 1 times [2020-10-28 19:17:53,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:17:53,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1064949331] [2020-10-28 19:17:53,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:17:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:17:54,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:55,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:55,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:56,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:56,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:56,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:57,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:57,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:57,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:57,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:57,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:58,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:58,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:58,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:58,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:17:59,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:17:59,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 19:17:59,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:17:59,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5041 [2020-10-28 19:17:59,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:17:59,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:17:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:17:59,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-28 19:17:59,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 217 [2020-10-28 19:17:59,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:18:00,437 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:18:00,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:00,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:00,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:00,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:00,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:00,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:00,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 19:18:00,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:00,490 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:00,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:00,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:00,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:00,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:00,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1064949331] [2020-10-28 19:18:00,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:00,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:18:00,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319248064] [2020-10-28 19:18:00,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:18:00,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:00,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:18:00,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:18:00,755 INFO L87 Difference]: Start difference. First operand 800 states. Second operand 4 states. [2020-10-28 19:18:01,588 WARN L193 SmtUtils]: Spent 663.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 19:18:07,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:07,669 INFO L93 Difference]: Finished difference Result 1521 states and 2667 transitions. [2020-10-28 19:18:07,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:18:07,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-28 19:18:07,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:07,707 INFO L225 Difference]: With dead ends: 1521 [2020-10-28 19:18:07,707 INFO L226 Difference]: Without dead ends: 1301 [2020-10-28 19:18:07,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:07,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2020-10-28 19:18:07,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1298. [2020-10-28 19:18:07,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1298 states. [2020-10-28 19:18:07,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2029 transitions. [2020-10-28 19:18:07,896 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2029 transitions. Word has length 319 [2020-10-28 19:18:07,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:07,903 INFO L481 AbstractCegarLoop]: Abstraction has 1298 states and 2029 transitions. [2020-10-28 19:18:07,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:18:07,904 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2029 transitions. [2020-10-28 19:18:07,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 19:18:07,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:07,926 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] [2020-10-28 19:18:07,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 19:18:07,927 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:07,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:07,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1932269269, now seen corresponding path program 1 times [2020-10-28 19:18:07,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:07,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211912668] [2020-10-28 19:18:07,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:08,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:08,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:08,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:08,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:09,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:09,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:09,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:09,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:09,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:10,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:10,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:10,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:10,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:10,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:10,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:13,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:13,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 19:18:13,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:18:13,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 19:18:13,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:13,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:13,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:18:13,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-28 19:18:13,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 225 [2020-10-28 19:18:13,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:18:14,165 WARN L193 SmtUtils]: Spent 804.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:18:14,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:14,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:14,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:14,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:14,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:14,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:14,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-10-28 19:18:14,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:14,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:14,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:14,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:18:14,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:14,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211912668] [2020-10-28 19:18:14,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:14,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:18:14,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850078897] [2020-10-28 19:18:14,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:18:14,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:14,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:18:14,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:18:14,523 INFO L87 Difference]: Start difference. First operand 1298 states and 2029 transitions. Second operand 4 states. [2020-10-28 19:18:15,359 WARN L193 SmtUtils]: Spent 772.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 19:18:20,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:20,400 INFO L93 Difference]: Finished difference Result 2674 states and 4204 transitions. [2020-10-28 19:18:20,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:18:20,401 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-28 19:18:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:20,417 INFO L225 Difference]: With dead ends: 2674 [2020-10-28 19:18:20,417 INFO L226 Difference]: Without dead ends: 2291 [2020-10-28 19:18:20,421 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:20,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2291 states. [2020-10-28 19:18:20,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2291 to 2288. [2020-10-28 19:18:20,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2288 states. [2020-10-28 19:18:20,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2288 states to 2288 states and 3565 transitions. [2020-10-28 19:18:20,508 INFO L78 Accepts]: Start accepts. Automaton has 2288 states and 3565 transitions. Word has length 319 [2020-10-28 19:18:20,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:20,509 INFO L481 AbstractCegarLoop]: Abstraction has 2288 states and 3565 transitions. [2020-10-28 19:18:20,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:18:20,509 INFO L276 IsEmpty]: Start isEmpty. Operand 2288 states and 3565 transitions. [2020-10-28 19:18:20,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 19:18:20,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:20,518 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] [2020-10-28 19:18:20,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 19:18:20,518 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:20,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:20,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1257489356, now seen corresponding path program 1 times [2020-10-28 19:18:20,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:20,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [81870023] [2020-10-28 19:18:20,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:20,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:20,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:20,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:21,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:21,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:21,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:21,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:21,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:21,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:22,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:22,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:22,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:22,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:22,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:22,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:23,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:25,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:25,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 19:18:25,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:18:25,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5048 [2020-10-28 19:18:25,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:25,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:18:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 19:18:25,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 241 [2020-10-28 19:18:25,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:26,457 WARN L193 SmtUtils]: Spent 644.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:18:26,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:26,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:26,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:26,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:26,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:26,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:26,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:18:26,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:26,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:26,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:26,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:26,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:26,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 19:18:26,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:26,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [81870023] [2020-10-28 19:18:26,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:26,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:18:26,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827408784] [2020-10-28 19:18:26,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:18:26,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:26,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:18:26,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:18:26,678 INFO L87 Difference]: Start difference. First operand 2288 states and 3565 transitions. Second operand 4 states. [2020-10-28 19:18:27,453 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 308 [2020-10-28 19:18:32,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:32,212 INFO L93 Difference]: Finished difference Result 4858 states and 7625 transitions. [2020-10-28 19:18:32,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:18:32,212 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 319 [2020-10-28 19:18:32,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:32,237 INFO L225 Difference]: With dead ends: 4858 [2020-10-28 19:18:32,237 INFO L226 Difference]: Without dead ends: 4191 [2020-10-28 19:18:32,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:32,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2020-10-28 19:18:32,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 4188. [2020-10-28 19:18:32,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4188 states. [2020-10-28 19:18:32,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 6505 transitions. [2020-10-28 19:18:32,420 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 6505 transitions. Word has length 319 [2020-10-28 19:18:32,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:32,421 INFO L481 AbstractCegarLoop]: Abstraction has 4188 states and 6505 transitions. [2020-10-28 19:18:32,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:18:32,421 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 6505 transitions. [2020-10-28 19:18:32,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 19:18:32,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:32,434 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] [2020-10-28 19:18:32,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 19:18:32,434 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:32,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:32,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1907491795, now seen corresponding path program 1 times [2020-10-28 19:18:32,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:32,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562788458] [2020-10-28 19:18:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:32,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:32,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:33,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:34,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:34,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:34,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:34,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:34,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:34,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:34,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:37,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:37,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 19:18:37,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:18:37,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 19:18:37,695 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:37,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:37,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:18:37,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:18:37,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-28 19:18:37,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:38,663 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:18:38,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:38,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:38,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:38,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:38,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:38,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:38,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-28 19:18:38,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:38,702 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:38,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:38,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:38,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:38,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:38,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:38,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562788458] [2020-10-28 19:18:38,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:38,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:18:38,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217382318] [2020-10-28 19:18:38,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:18:38,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:38,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:18:38,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:38,952 INFO L87 Difference]: Start difference. First operand 4188 states and 6505 transitions. Second operand 5 states. [2020-10-28 19:18:46,813 WARN L193 SmtUtils]: Spent 757.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:18:49,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:18:49,224 INFO L93 Difference]: Finished difference Result 12336 states and 19130 transitions. [2020-10-28 19:18:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:18:49,224 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 319 [2020-10-28 19:18:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:18:49,266 INFO L225 Difference]: With dead ends: 12336 [2020-10-28 19:18:49,266 INFO L226 Difference]: Without dead ends: 8193 [2020-10-28 19:18:49,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:18:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8193 states. [2020-10-28 19:18:49,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8193 to 8190. [2020-10-28 19:18:49,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8190 states. [2020-10-28 19:18:49,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8190 states to 8190 states and 12647 transitions. [2020-10-28 19:18:49,736 INFO L78 Accepts]: Start accepts. Automaton has 8190 states and 12647 transitions. Word has length 319 [2020-10-28 19:18:49,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:18:49,737 INFO L481 AbstractCegarLoop]: Abstraction has 8190 states and 12647 transitions. [2020-10-28 19:18:49,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:18:49,737 INFO L276 IsEmpty]: Start isEmpty. Operand 8190 states and 12647 transitions. [2020-10-28 19:18:49,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-28 19:18:49,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:18:49,757 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] [2020-10-28 19:18:49,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 19:18:49,757 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:18:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:18:49,758 INFO L82 PathProgramCache]: Analyzing trace with hash -172768407, now seen corresponding path program 1 times [2020-10-28 19:18:49,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:18:49,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160514380] [2020-10-28 19:18:49,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:18:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:49,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:50,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:50,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:50,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:50,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:50,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:50,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:51,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:54,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:54,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-28 19:18:54,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 19:18:54,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 19:18:54,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:54,851 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:54,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:18:54,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:18:54,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-28 19:18:54,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:55,660 WARN L193 SmtUtils]: Spent 647.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:18:55,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:18:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:18:55,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:18:55,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:18:55,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:18:55,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:18:55,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:18:55,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:18:55,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:18:55,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:18:55,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:18:55,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:18:55,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:18:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:18:55,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160514380] [2020-10-28 19:18:55,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:18:55,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:18:55,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858606772] [2020-10-28 19:18:55,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:18:55,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:18:55,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:18:55,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:18:55,835 INFO L87 Difference]: Start difference. First operand 8190 states and 12647 transitions. Second operand 5 states. [2020-10-28 19:19:02,675 WARN L193 SmtUtils]: Spent 723.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:19:04,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:19:04,916 INFO L93 Difference]: Finished difference Result 24215 states and 37344 transitions. [2020-10-28 19:19:04,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:19:04,917 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 321 [2020-10-28 19:19:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:19:04,991 INFO L225 Difference]: With dead ends: 24215 [2020-10-28 19:19:04,991 INFO L226 Difference]: Without dead ends: 16042 [2020-10-28 19:19:05,009 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:19:05,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16042 states. [2020-10-28 19:19:05,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16042 to 16039. [2020-10-28 19:19:05,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16039 states. [2020-10-28 19:19:05,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16039 states to 16039 states and 24607 transitions. [2020-10-28 19:19:05,933 INFO L78 Accepts]: Start accepts. Automaton has 16039 states and 24607 transitions. Word has length 321 [2020-10-28 19:19:05,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:19:05,934 INFO L481 AbstractCegarLoop]: Abstraction has 16039 states and 24607 transitions. [2020-10-28 19:19:05,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:19:05,934 INFO L276 IsEmpty]: Start isEmpty. Operand 16039 states and 24607 transitions. [2020-10-28 19:19:05,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-28 19:19:05,964 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:19:05,964 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] [2020-10-28 19:19:05,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 19:19:05,964 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:19:05,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:19:05,965 INFO L82 PathProgramCache]: Analyzing trace with hash 342197468, now seen corresponding path program 1 times [2020-10-28 19:19:05,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:19:05,966 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [774672906] [2020-10-28 19:19:05,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:19:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:06,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:06,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:06,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:06,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:06,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:06,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:06,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:06,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:06,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:06,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:06,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:07,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:07,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:07,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:08,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:08,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:11,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:11,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-28 19:19:11,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 19:19:11,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 19:19:11,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:11,024 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:11,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:19:11,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 19:19:11,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-10-28 19:19:11,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:11,834 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:19:11,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:19:11,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:11,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:11,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:11,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:19:11,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:19:11,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 19:19:11,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:11,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:11,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:19:11,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:19:11,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:19:11,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:12,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:19:12,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [774672906] [2020-10-28 19:19:12,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:19:12,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:19:12,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379622707] [2020-10-28 19:19:12,009 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:19:12,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:19:12,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:19:12,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:19:12,010 INFO L87 Difference]: Start difference. First operand 16039 states and 24607 transitions. Second operand 4 states. [2020-10-28 19:19:20,622 WARN L193 SmtUtils]: Spent 733.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 19:19:22,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:19:22,919 INFO L93 Difference]: Finished difference Result 47281 states and 72410 transitions. [2020-10-28 19:19:22,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:19:22,920 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 323 [2020-10-28 19:19:22,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:19:22,988 INFO L225 Difference]: With dead ends: 47281 [2020-10-28 19:19:22,988 INFO L226 Difference]: Without dead ends: 31424 [2020-10-28 19:19:23,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:19:23,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31424 states. [2020-10-28 19:19:24,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31424 to 31421. [2020-10-28 19:19:24,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31421 states. [2020-10-28 19:19:24,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31421 states to 31421 states and 47906 transitions. [2020-10-28 19:19:24,613 INFO L78 Accepts]: Start accepts. Automaton has 31421 states and 47906 transitions. Word has length 323 [2020-10-28 19:19:24,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:19:24,613 INFO L481 AbstractCegarLoop]: Abstraction has 31421 states and 47906 transitions. [2020-10-28 19:19:24,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:19:24,614 INFO L276 IsEmpty]: Start isEmpty. Operand 31421 states and 47906 transitions. [2020-10-28 19:19:24,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2020-10-28 19:19:24,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:19:24,671 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] [2020-10-28 19:19:24,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 19:19:24,672 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:19:24,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:19:24,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1688943223, now seen corresponding path program 1 times [2020-10-28 19:19:24,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:19:24,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055299583] [2020-10-28 19:19:24,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:19:24,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:24,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:24,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:24,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:24,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:25,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:25,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:25,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:25,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:25,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:25,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:25,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:25,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:25,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:25,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:26,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:29,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:29,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:29,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:29,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:29,783 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:29,783 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 331 [2020-10-28 19:19:29,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 19:19:29,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-28 19:19:29,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:29,784 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:19:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:19:29,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 136 [2020-10-28 19:19:29,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:30,632 WARN L193 SmtUtils]: Spent 703.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:19:30,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:19:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:30,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:30,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:30,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:19:30,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:19:30,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 19:19:30,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:30,672 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:19:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:19:30,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:19:30,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:30,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:19:30,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055299583] [2020-10-28 19:19:30,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:19:30,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:19:30,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026548720] [2020-10-28 19:19:30,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:19:30,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:19:30,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:19:30,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:19:30,794 INFO L87 Difference]: Start difference. First operand 31421 states and 47906 transitions. Second operand 5 states. [2020-10-28 19:19:38,457 WARN L193 SmtUtils]: Spent 768.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:19:41,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:19:41,164 INFO L93 Difference]: Finished difference Result 92606 states and 140896 transitions. [2020-10-28 19:19:41,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:19:41,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 323 [2020-10-28 19:19:41,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:19:41,293 INFO L225 Difference]: With dead ends: 92606 [2020-10-28 19:19:41,293 INFO L226 Difference]: Without dead ends: 61445 [2020-10-28 19:19:41,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:19:41,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61445 states. [2020-10-28 19:19:43,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61445 to 61442. [2020-10-28 19:19:43,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61442 states. [2020-10-28 19:19:44,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61442 states to 61442 states and 92980 transitions. [2020-10-28 19:19:44,100 INFO L78 Accepts]: Start accepts. Automaton has 61442 states and 92980 transitions. Word has length 323 [2020-10-28 19:19:44,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:19:44,100 INFO L481 AbstractCegarLoop]: Abstraction has 61442 states and 92980 transitions. [2020-10-28 19:19:44,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:19:44,101 INFO L276 IsEmpty]: Start isEmpty. Operand 61442 states and 92980 transitions. [2020-10-28 19:19:44,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:19:44,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:19:44,419 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:19:44,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 19:19:44,419 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:19:44,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:19:44,420 INFO L82 PathProgramCache]: Analyzing trace with hash 265287874, now seen corresponding path program 1 times [2020-10-28 19:19:44,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:19:44,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919307411] [2020-10-28 19:19:44,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:19:44,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:44,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:44,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:44,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:44,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:44,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:44,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:44,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:45,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:45,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:45,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:45,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:45,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:45,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:45,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:47,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:47,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:47,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:47,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:49,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:49,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:19:49,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 19:19:49,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 19:19:49,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:49,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:49,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 19:19:49,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 19:19:49,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 19:19:49,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:19:50,287 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:19:50,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:19:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:19:50,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:19:50,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:19:50,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:19:50,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:19:50,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-28 19:19:50,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:19:50,321 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:19:50,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:19:50,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:19:50,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:19:50,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 19:19:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:19:50,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919307411] [2020-10-28 19:19:50,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:19:50,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 19:19:50,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598508438] [2020-10-28 19:19:50,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 19:19:50,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:19:50,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 19:19:50,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 19:19:50,462 INFO L87 Difference]: Start difference. First operand 61442 states and 92980 transitions. Second operand 4 states. [2020-10-28 19:20:01,073 WARN L193 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 312 [2020-10-28 19:20:04,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:20:04,719 INFO L93 Difference]: Finished difference Result 181011 states and 273308 transitions. [2020-10-28 19:20:04,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 19:20:04,719 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-28 19:20:04,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:20:04,915 INFO L225 Difference]: With dead ends: 181011 [2020-10-28 19:20:04,915 INFO L226 Difference]: Without dead ends: 120112 [2020-10-28 19:20:05,006 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:20:05,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120112 states. [2020-10-28 19:20:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120112 to 120109. [2020-10-28 19:20:10,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120109 states. [2020-10-28 19:20:10,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120109 states to 120109 states and 180352 transitions. [2020-10-28 19:20:10,833 INFO L78 Accepts]: Start accepts. Automaton has 120109 states and 180352 transitions. Word has length 325 [2020-10-28 19:20:10,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:20:10,833 INFO L481 AbstractCegarLoop]: Abstraction has 120109 states and 180352 transitions. [2020-10-28 19:20:10,833 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 19:20:10,833 INFO L276 IsEmpty]: Start isEmpty. Operand 120109 states and 180352 transitions. [2020-10-28 19:20:11,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-28 19:20:11,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:20:11,225 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:20:11,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 19:20:11,225 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:20:11,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:20:11,229 INFO L82 PathProgramCache]: Analyzing trace with hash 664784413, now seen corresponding path program 1 times [2020-10-28 19:20:11,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:20:11,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1105060441] [2020-10-28 19:20:11,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:20:11,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:11,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:11,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:11,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:11,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:11,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:11,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:11,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:11,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:11,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:11,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:12,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:12,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:12,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:12,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:12,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:13,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:13,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:13,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:13,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:16,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:16,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 333 [2020-10-28 19:20:16,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 19:20:16,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-28 19:20:16,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:16,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:16,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:20:16,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:20:16,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 144 [2020-10-28 19:20:16,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:20:17,222 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:20:17,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:20:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:17,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:17,268 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:17,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:20:17,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:20:17,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 19:20:17,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:17,269 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:17,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:20:17,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:20:17,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:20:17,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:20:17,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:20:17,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1105060441] [2020-10-28 19:20:17,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:20:17,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:20:17,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942689946] [2020-10-28 19:20:17,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:20:17,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:20:17,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:20:17,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:20:17,420 INFO L87 Difference]: Start difference. First operand 120109 states and 180352 transitions. Second operand 5 states. [2020-10-28 19:20:31,876 WARN L193 SmtUtils]: Spent 780.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-28 19:20:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 19:20:38,161 INFO L93 Difference]: Finished difference Result 353801 states and 530078 transitions. [2020-10-28 19:20:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 19:20:38,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-28 19:20:38,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 19:20:38,701 INFO L225 Difference]: With dead ends: 353801 [2020-10-28 19:20:38,702 INFO L226 Difference]: Without dead ends: 234926 [2020-10-28 19:20:38,804 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 19:20:38,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234926 states. [2020-10-28 19:20:51,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234926 to 234923. [2020-10-28 19:20:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234923 states. [2020-10-28 19:20:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234923 states to 234923 states and 350066 transitions. [2020-10-28 19:20:52,080 INFO L78 Accepts]: Start accepts. Automaton has 234923 states and 350066 transitions. Word has length 325 [2020-10-28 19:20:52,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 19:20:52,082 INFO L481 AbstractCegarLoop]: Abstraction has 234923 states and 350066 transitions. [2020-10-28 19:20:52,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 19:20:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 234923 states and 350066 transitions. [2020-10-28 19:20:52,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-28 19:20:52,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 19:20:52,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 19:20:52,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 19:20:52,366 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 19:20:52,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 19:20:52,366 INFO L82 PathProgramCache]: Analyzing trace with hash -888908751, now seen corresponding path program 1 times [2020-10-28 19:20:52,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 19:20:52,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784284684] [2020-10-28 19:20:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 19:20:52,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:52,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:52,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:52,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:52,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:52,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:52,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:53,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:53,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:53,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:53,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:53,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:53,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:53,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:53,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:54,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:55,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:55,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:55,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:57,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:57,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 335 [2020-10-28 19:20:57,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 19:20:57,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 19:20:57,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:57,434 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:57,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 19:20:57,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 19:20:57,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-28 19:20:57,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:20:58,276 WARN L193 SmtUtils]: Spent 721.00 ms on a formula simplification that was a NOOP. DAG size: 307 [2020-10-28 19:20:58,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 19:20:58,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 19:20:58,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 19:20:58,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 19:20:58,302 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 19:20:58,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 19:20:58,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-28 19:20:58,302 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 19:20:58,302 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 19:20:58,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 19:20:58,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 19:20:58,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 19:20:58,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 19:20:58,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 19:20:58,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784284684] [2020-10-28 19:20:58,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 19:20:58,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 19:20:58,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30092656] [2020-10-28 19:20:58,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 19:20:58,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 19:20:58,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 19:20:58,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 19:20:58,459 INFO L87 Difference]: Start difference. First operand 234923 states and 350066 transitions. Second operand 5 states. [2020-10-28 19:21:20,748 WARN L193 SmtUtils]: Spent 809.00 ms on a formula simplification that was a NOOP. DAG size: 313