/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 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-19 18:16:56,767 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:16:56,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:16:56,829 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 18:16:56,830 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 18:16:56,835 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 18:16:56,838 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 18:16:56,847 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 18:16:56,851 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 18:16:56,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 18:16:56,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 18:16:56,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 18:16:56,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:16:56,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:16:56,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:16:56,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:16:56,874 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:16:56,876 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:16:56,885 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:16:56,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:16:56,896 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:16:56,898 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:16:56,900 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:16:56,903 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:16:56,925 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-02-19 18:16:56,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-02-19 18:16:56,927 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-02-19 18:16:56,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-02-19 18:16:56,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-02-19 18:16:56,935 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-02-19 18:16:56,936 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-02-19 18:16:56,937 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-02-19 18:16:56,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-02-19 18:16:56,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-02-19 18:16:56,940 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-02-19 18:16:56,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-02-19 18:16:56,941 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-02-19 18:16:56,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-02-19 18:16:56,942 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:16:56,943 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:16:56,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:16:56,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 18:16:56,975 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:16:56,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:16:56,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:16:56,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:16:56,978 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:16:56,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:16:56,978 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:16:56,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:16:56,979 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:16:56,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:16:56,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:16:56,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:16:56,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:16:56,980 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:16:56,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:16:56,980 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:16:56,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:16:56,981 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:16:56,981 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:16:56,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:16:56,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:16:56,982 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:16:56,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:16:56,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:16:56,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:16:56,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:16:56,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:16:56,983 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 18:16:56,983 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:16:57,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:16:57,413 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:16:57,416 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:16:57,418 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 18:16:57,419 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 18:16:57,420 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2021-02-19 18:16:57,515 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a4ba11f4/cafd3192748046f19c494ec4eba403c9/FLAGa201af654 [2021-02-19 18:16:58,467 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 18:16:58,470 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2021-02-19 18:16:58,507 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a4ba11f4/cafd3192748046f19c494ec4eba403c9/FLAGa201af654 [2021-02-19 18:16:58,529 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9a4ba11f4/cafd3192748046f19c494ec4eba403c9 [2021-02-19 18:16:58,533 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:16:58,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:16:58,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 18:16:58,556 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 18:16:58,560 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 18:16:58,562 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:16:58" (1/1) ... [2021-02-19 18:16:58,563 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26840256 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:16:58, skipping insertion in model container [2021-02-19 18:16:58,563 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:16:58" (1/1) ... [2021-02-19 18:16:58,573 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 18:16:58,785 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 18:16:59,786 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[49434,49447] [2021-02-19 18:16:59,902 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[55108,55121] [2021-02-19 18:17:00,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:17:00,295 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 18:17:00,859 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[49434,49447] [2021-02-19 18:17:00,943 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c[55108,55121] [2021-02-19 18:17:01,220 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:17:01,270 INFO L208 MainTranslator]: Completed translation [2021-02-19 18:17:01,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:01 WrapperNode [2021-02-19 18:17:01,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 18:17:01,272 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:17:01,272 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:17:01,273 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:17:01,289 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:01" (1/1) ... [2021-02-19 18:17:01,289 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:01" (1/1) ... [2021-02-19 18:17:01,378 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:01" (1/1) ... [2021-02-19 18:17:01,379 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:01" (1/1) ... [2021-02-19 18:17:01,474 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:01" (1/1) ... [2021-02-19 18:17:01,519 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:01" (1/1) ... [2021-02-19 18:17:01,537 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:01" (1/1) ... [2021-02-19 18:17:01,562 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:17:01,563 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:17:01,563 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:17:01,563 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:17:01,567 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:01" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2021-02-19 18:17:01,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 18:17:01,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:17:01,692 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 18:17:01,692 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-19 18:17:01,692 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 18:17:01,692 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 18:17:01,694 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 18:17:01,694 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 18:17:01,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 18:17:01,695 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-19 18:17:01,696 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-19 18:17:01,697 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-19 18:17:01,700 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-19 18:17:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-19 18:17:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-19 18:17:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-19 18:17:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-19 18:17:01,701 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-19 18:17:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-19 18:17:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2021-02-19 18:17:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-19 18:17:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-19 18:17:01,702 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 18:17:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 18:17:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 18:17:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:17:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 18:17:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 18:17:01,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 18:17:06,111 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:17:06,112 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:17:06,116 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:17:06 BoogieIcfgContainer [2021-02-19 18:17:06,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:17:06,121 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:17:06,122 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:17:06,126 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:17:06,127 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 06:16:58" (1/3) ... [2021-02-19 18:17:06,128 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2693e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:17:06, skipping insertion in model container [2021-02-19 18:17:06,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:01" (2/3) ... [2021-02-19 18:17:06,129 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d2693e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:17:06, skipping insertion in model container [2021-02-19 18:17:06,129 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:17:06" (3/3) ... [2021-02-19 18:17:06,132 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2021-02-19 18:17:06,141 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:17:06,149 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-02-19 18:17:06,173 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-02-19 18:17:06,231 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:17:06,232 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:17:06,232 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:17:06,232 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:17:06,232 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:17:06,232 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:17:06,232 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:17:06,233 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:17:06,294 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states. [2021-02-19 18:17:06,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 465 [2021-02-19 18:17:06,350 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:17:06,355 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:17:06,355 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:17:06,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:17:06,367 INFO L82 PathProgramCache]: Analyzing trace with hash -663428098, now seen corresponding path program 1 times [2021-02-19 18:17:06,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:17:06,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852052721] [2021-02-19 18:17:06,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:17:08,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:17:08,869 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:08,871 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:17:08,873 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:08,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:17:08,896 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:08,898 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:17:08,914 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:08,914 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:17:10,315 WARN L202 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 421 [2021-02-19 18:17:10,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:17:10,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:17:10,348 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:10,349 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:17:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:17:10,877 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852052721] [2021-02-19 18:17:10,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:17:10,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:17:10,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520554396] [2021-02-19 18:17:10,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:17:10,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:17:10,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:17:10,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:17:10,906 INFO L87 Difference]: Start difference. First operand 1371 states. Second operand 5 states. [2021-02-19 18:17:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:17:29,795 INFO L93 Difference]: Finished difference Result 4059 states and 7350 transitions. [2021-02-19 18:17:29,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:17:29,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 464 [2021-02-19 18:17:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:17:29,834 INFO L225 Difference]: With dead ends: 4059 [2021-02-19 18:17:29,834 INFO L226 Difference]: Without dead ends: 2697 [2021-02-19 18:17:29,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:17:29,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2697 states. [2021-02-19 18:17:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2697 to 2647. [2021-02-19 18:17:30,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2647 states. [2021-02-19 18:17:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2647 states to 2647 states and 4347 transitions. [2021-02-19 18:17:30,118 INFO L78 Accepts]: Start accepts. Automaton has 2647 states and 4347 transitions. Word has length 464 [2021-02-19 18:17:30,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:17:30,119 INFO L480 AbstractCegarLoop]: Abstraction has 2647 states and 4347 transitions. [2021-02-19 18:17:30,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-19 18:17:30,120 INFO L276 IsEmpty]: Start isEmpty. Operand 2647 states and 4347 transitions. [2021-02-19 18:17:30,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 467 [2021-02-19 18:17:30,135 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:17:30,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:17:30,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:17:30,137 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:17:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:17:30,138 INFO L82 PathProgramCache]: Analyzing trace with hash -464023190, now seen corresponding path program 1 times [2021-02-19 18:17:30,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:17:30,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731594943] [2021-02-19 18:17:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:17:30,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:17:30,480 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:30,481 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:17:30,482 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:30,483 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:17:30,488 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:30,489 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:17:31,800 WARN L202 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 421 [2021-02-19 18:17:31,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:17:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:17:31,823 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:31,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:17:32,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:17:32,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731594943] [2021-02-19 18:17:32,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:17:32,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:17:32,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900445903] [2021-02-19 18:17:32,148 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:17:32,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:17:32,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:17:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:17:32,161 INFO L87 Difference]: Start difference. First operand 2647 states and 4347 transitions. Second operand 4 states. [2021-02-19 18:17:52,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:17:52,018 INFO L93 Difference]: Finished difference Result 7670 states and 12560 transitions. [2021-02-19 18:17:52,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:17:52,020 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 466 [2021-02-19 18:17:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:17:52,050 INFO L225 Difference]: With dead ends: 7670 [2021-02-19 18:17:52,051 INFO L226 Difference]: Without dead ends: 5237 [2021-02-19 18:17:52,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:17:52,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5237 states. [2021-02-19 18:17:52,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5237 to 5189. [2021-02-19 18:17:52,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5189 states. [2021-02-19 18:17:52,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5189 states to 5189 states and 8497 transitions. [2021-02-19 18:17:52,287 INFO L78 Accepts]: Start accepts. Automaton has 5189 states and 8497 transitions. Word has length 466 [2021-02-19 18:17:52,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:17:52,290 INFO L480 AbstractCegarLoop]: Abstraction has 5189 states and 8497 transitions. [2021-02-19 18:17:52,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:17:52,290 INFO L276 IsEmpty]: Start isEmpty. Operand 5189 states and 8497 transitions. [2021-02-19 18:17:52,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2021-02-19 18:17:52,311 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:17:52,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:17:52,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:17:52,312 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:17:52,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:17:52,315 INFO L82 PathProgramCache]: Analyzing trace with hash -507557565, now seen corresponding path program 1 times [2021-02-19 18:17:52,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:17:52,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740106555] [2021-02-19 18:17:52,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:17:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:17:52,535 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:52,536 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:17:52,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:52,537 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:17:52,542 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:52,543 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:17:53,652 WARN L202 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 421 [2021-02-19 18:17:53,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:17:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:17:53,674 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:53,675 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:17:53,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:17:53,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740106555] [2021-02-19 18:17:53,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:17:53,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:17:53,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950180568] [2021-02-19 18:17:53,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:17:53,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:17:53,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:17:53,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:17:53,873 INFO L87 Difference]: Start difference. First operand 5189 states and 8497 transitions. Second operand 4 states. [2021-02-19 18:18:12,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:18:12,287 INFO L93 Difference]: Finished difference Result 15470 states and 25323 transitions. [2021-02-19 18:18:12,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:18:12,288 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 467 [2021-02-19 18:18:12,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:18:12,342 INFO L225 Difference]: With dead ends: 15470 [2021-02-19 18:18:12,343 INFO L226 Difference]: Without dead ends: 10333 [2021-02-19 18:18:12,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:18:12,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10333 states. [2021-02-19 18:18:12,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10333 to 5236. [2021-02-19 18:18:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5236 states. [2021-02-19 18:18:12,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 8571 transitions. [2021-02-19 18:18:12,637 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 8571 transitions. Word has length 467 [2021-02-19 18:18:12,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:18:12,637 INFO L480 AbstractCegarLoop]: Abstraction has 5236 states and 8571 transitions. [2021-02-19 18:18:12,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:18:12,638 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 8571 transitions. [2021-02-19 18:18:12,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-02-19 18:18:12,658 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:18:12,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:18:12,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:18:12,659 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:18:12,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:18:12,660 INFO L82 PathProgramCache]: Analyzing trace with hash 976232965, now seen corresponding path program 1 times [2021-02-19 18:18:12,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:18:12,660 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794626743] [2021-02-19 18:18:12,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:18:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:18:13,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:13,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:13,062 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:13,063 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:18:13,067 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:13,068 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:14,268 WARN L202 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 421 [2021-02-19 18:18:14,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:18:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:18:14,290 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:14,291 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:14,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:18:14,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794626743] [2021-02-19 18:18:14,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:18:14,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:18:14,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720516687] [2021-02-19 18:18:14,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:18:14,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:18:14,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:18:14,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:18:14,580 INFO L87 Difference]: Start difference. First operand 5236 states and 8571 transitions. Second operand 4 states. [2021-02-19 18:18:33,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:18:33,395 INFO L93 Difference]: Finished difference Result 15048 states and 24542 transitions. [2021-02-19 18:18:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:18:33,395 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2021-02-19 18:18:33,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:18:33,455 INFO L225 Difference]: With dead ends: 15048 [2021-02-19 18:18:33,455 INFO L226 Difference]: Without dead ends: 10211 [2021-02-19 18:18:33,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:18:33,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2021-02-19 18:18:33,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 10165. [2021-02-19 18:18:33,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10165 states. [2021-02-19 18:18:33,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10165 states to 10165 states and 16557 transitions. [2021-02-19 18:18:33,890 INFO L78 Accepts]: Start accepts. Automaton has 10165 states and 16557 transitions. Word has length 468 [2021-02-19 18:18:33,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:18:33,891 INFO L480 AbstractCegarLoop]: Abstraction has 10165 states and 16557 transitions. [2021-02-19 18:18:33,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:18:33,891 INFO L276 IsEmpty]: Start isEmpty. Operand 10165 states and 16557 transitions. [2021-02-19 18:18:33,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2021-02-19 18:18:33,918 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:18:33,919 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:18:33,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:18:33,919 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:18:33,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:18:33,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1597701642, now seen corresponding path program 1 times [2021-02-19 18:18:33,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:18:33,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374452549] [2021-02-19 18:18:33,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:18:33,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:18:34,087 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:34,088 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:34,088 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:34,089 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:18:34,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:34,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:35,175 WARN L202 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 421 [2021-02-19 18:18:35,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:18:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:18:35,200 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:35,201 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:35,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:18:35,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374452549] [2021-02-19 18:18:35,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:18:35,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:18:35,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473868560] [2021-02-19 18:18:35,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:18:35,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:18:35,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:18:35,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:18:35,474 INFO L87 Difference]: Start difference. First operand 10165 states and 16557 transitions. Second operand 4 states. [2021-02-19 18:18:54,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:18:54,965 INFO L93 Difference]: Finished difference Result 30239 states and 49226 transitions. [2021-02-19 18:18:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:18:54,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 468 [2021-02-19 18:18:54,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:18:55,009 INFO L225 Difference]: With dead ends: 30239 [2021-02-19 18:18:55,010 INFO L226 Difference]: Without dead ends: 20218 [2021-02-19 18:18:55,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:18:55,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20218 states. [2021-02-19 18:18:55,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20218 to 10263. [2021-02-19 18:18:55,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10263 states. [2021-02-19 18:18:55,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10263 states to 10263 states and 16708 transitions. [2021-02-19 18:18:55,528 INFO L78 Accepts]: Start accepts. Automaton has 10263 states and 16708 transitions. Word has length 468 [2021-02-19 18:18:55,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:18:55,529 INFO L480 AbstractCegarLoop]: Abstraction has 10263 states and 16708 transitions. [2021-02-19 18:18:55,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:18:55,529 INFO L276 IsEmpty]: Start isEmpty. Operand 10263 states and 16708 transitions. [2021-02-19 18:18:55,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2021-02-19 18:18:55,552 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:18:55,554 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:18:55,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:18:55,554 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:18:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:18:55,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1030238100, now seen corresponding path program 1 times [2021-02-19 18:18:55,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:18:55,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572863764] [2021-02-19 18:18:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:18:55,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:18:55,735 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:55,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:55,736 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:55,737 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:18:55,741 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:55,741 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:56,937 WARN L202 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 421 [2021-02-19 18:18:56,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:18:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:18:56,957 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:56,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:57,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:18:57,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572863764] [2021-02-19 18:18:57,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:18:57,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:18:57,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189185527] [2021-02-19 18:18:57,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:18:57,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:18:57,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:18:57,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:18:57,164 INFO L87 Difference]: Start difference. First operand 10263 states and 16708 transitions. Second operand 4 states. [2021-02-19 18:19:17,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:19:17,056 INFO L93 Difference]: Finished difference Result 30374 states and 49407 transitions. [2021-02-19 18:19:17,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:19:17,057 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 469 [2021-02-19 18:19:17,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:19:17,096 INFO L225 Difference]: With dead ends: 30374 [2021-02-19 18:19:17,096 INFO L226 Difference]: Without dead ends: 20335 [2021-02-19 18:19:17,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:19:17,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20335 states. [2021-02-19 18:19:17,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20335 to 10380. [2021-02-19 18:19:17,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10380 states. [2021-02-19 18:19:17,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 16854 transitions. [2021-02-19 18:19:17,750 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 16854 transitions. Word has length 469 [2021-02-19 18:19:17,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:19:17,750 INFO L480 AbstractCegarLoop]: Abstraction has 10380 states and 16854 transitions. [2021-02-19 18:19:17,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:19:17,750 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 16854 transitions. [2021-02-19 18:19:17,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-02-19 18:19:17,784 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:19:17,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:19:17,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 18:19:17,785 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:19:17,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:19:17,785 INFO L82 PathProgramCache]: Analyzing trace with hash -569034048, now seen corresponding path program 1 times [2021-02-19 18:19:17,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:19:17,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709648387] [2021-02-19 18:19:17,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:19:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:18,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:18,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:18,081 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:18,082 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:19:18,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:18,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:19,305 WARN L202 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 421 [2021-02-19 18:19:19,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:19:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:19,328 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:19,329 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:19,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:19:19,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709648387] [2021-02-19 18:19:19,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:19:19,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:19:19,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856195593] [2021-02-19 18:19:19,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:19:19,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:19:19,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:19:19,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:19:19,718 INFO L87 Difference]: Start difference. First operand 10380 states and 16854 transitions. Second operand 4 states. [2021-02-19 18:19:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:19:40,092 INFO L93 Difference]: Finished difference Result 29456 states and 47707 transitions. [2021-02-19 18:19:40,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:19:40,093 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 470 [2021-02-19 18:19:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:19:40,121 INFO L225 Difference]: With dead ends: 29456 [2021-02-19 18:19:40,121 INFO L226 Difference]: Without dead ends: 20045 [2021-02-19 18:19:40,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:19:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20045 states. [2021-02-19 18:19:40,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20045 to 20001. [2021-02-19 18:19:40,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20001 states. [2021-02-19 18:19:40,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 32327 transitions. [2021-02-19 18:19:40,963 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 32327 transitions. Word has length 470 [2021-02-19 18:19:40,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:19:40,964 INFO L480 AbstractCegarLoop]: Abstraction has 20001 states and 32327 transitions. [2021-02-19 18:19:40,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:19:40,965 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 32327 transitions. [2021-02-19 18:19:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2021-02-19 18:19:41,001 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:19:41,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:19:41,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:19:41,002 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:19:41,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:19:41,002 INFO L82 PathProgramCache]: Analyzing trace with hash -865094115, now seen corresponding path program 1 times [2021-02-19 18:19:41,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:19:41,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211072833] [2021-02-19 18:19:41,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:19:41,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:42,071 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:42,072 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:42,074 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:42,074 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:19:42,083 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-19 18:19:42,084 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-19 18:19:42,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:42,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:19:42,119 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:42,120 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:43,364 WARN L202 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 421 [2021-02-19 18:19:43,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:19:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:43,396 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:43,397 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:43,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:19:43,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211072833] [2021-02-19 18:19:43,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:19:43,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:19:43,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851276258] [2021-02-19 18:19:43,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:19:43,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:19:43,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:19:43,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:19:43,788 INFO L87 Difference]: Start difference. First operand 20001 states and 32327 transitions. Second operand 6 states. [2021-02-19 18:20:01,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:01,508 INFO L93 Difference]: Finished difference Result 58570 states and 94655 transitions. [2021-02-19 18:20:01,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:20:01,508 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 470 [2021-02-19 18:20:01,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:01,564 INFO L225 Difference]: With dead ends: 58570 [2021-02-19 18:20:01,564 INFO L226 Difference]: Without dead ends: 38787 [2021-02-19 18:20:01,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:20:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38787 states. [2021-02-19 18:20:03,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38787 to 38747. [2021-02-19 18:20:03,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38747 states. [2021-02-19 18:20:03,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38747 states to 38747 states and 62324 transitions. [2021-02-19 18:20:03,662 INFO L78 Accepts]: Start accepts. Automaton has 38747 states and 62324 transitions. Word has length 470 [2021-02-19 18:20:03,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:03,663 INFO L480 AbstractCegarLoop]: Abstraction has 38747 states and 62324 transitions. [2021-02-19 18:20:03,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:20:03,663 INFO L276 IsEmpty]: Start isEmpty. Operand 38747 states and 62324 transitions. [2021-02-19 18:20:03,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2021-02-19 18:20:03,700 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:20:03,701 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:03,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 18:20:03,701 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:20:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:03,702 INFO L82 PathProgramCache]: Analyzing trace with hash 853647975, now seen corresponding path program 1 times [2021-02-19 18:20:03,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:03,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497468155] [2021-02-19 18:20:03,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:03,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:03,956 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:03,957 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:03,958 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:03,958 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:20:03,964 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:03,964 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:05,352 WARN L202 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 421 [2021-02-19 18:20:05,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:20:05,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:05,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:05,373 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:05,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497468155] [2021-02-19 18:20:05,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:20:05,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:20:05,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300033880] [2021-02-19 18:20:05,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:20:05,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:05,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:20:05,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:05,953 INFO L87 Difference]: Start difference. First operand 38747 states and 62324 transitions. Second operand 4 states. [2021-02-19 18:20:29,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:29,386 INFO L93 Difference]: Finished difference Result 113570 states and 182525 transitions. [2021-02-19 18:20:29,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:20:29,387 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 472 [2021-02-19 18:20:29,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:29,482 INFO L225 Difference]: With dead ends: 113570 [2021-02-19 18:20:29,483 INFO L226 Difference]: Without dead ends: 76365 [2021-02-19 18:20:29,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:29,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76365 states. [2021-02-19 18:20:33,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76365 to 76329. [2021-02-19 18:20:33,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76329 states. [2021-02-19 18:20:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76329 states to 76329 states and 122310 transitions. [2021-02-19 18:20:33,457 INFO L78 Accepts]: Start accepts. Automaton has 76329 states and 122310 transitions. Word has length 472 [2021-02-19 18:20:33,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:33,458 INFO L480 AbstractCegarLoop]: Abstraction has 76329 states and 122310 transitions. [2021-02-19 18:20:33,458 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:20:33,458 INFO L276 IsEmpty]: Start isEmpty. Operand 76329 states and 122310 transitions. [2021-02-19 18:20:33,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-02-19 18:20:33,545 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:20:33,545 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:20:33,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 18:20:33,546 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:20:33,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:33,546 INFO L82 PathProgramCache]: Analyzing trace with hash 323506818, now seen corresponding path program 1 times [2021-02-19 18:20:33,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:33,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806780688] [2021-02-19 18:20:33,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:34,238 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:34,239 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:34,240 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:34,240 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:20:34,246 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:34,246 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:35,468 WARN L202 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 421 [2021-02-19 18:20:35,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:20:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:35,494 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:35,495 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:35,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:35,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806780688] [2021-02-19 18:20:35,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:20:35,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:20:35,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626592056] [2021-02-19 18:20:35,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:20:35,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:35,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:20:35,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:35,821 INFO L87 Difference]: Start difference. First operand 76329 states and 122310 transitions. Second operand 4 states. [2021-02-19 18:21:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:03,126 INFO L93 Difference]: Finished difference Result 222441 states and 355673 transitions. [2021-02-19 18:21:03,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:21:03,130 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 474 [2021-02-19 18:21:03,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:03,476 INFO L225 Difference]: With dead ends: 222441 [2021-02-19 18:21:03,476 INFO L226 Difference]: Without dead ends: 149820 [2021-02-19 18:21:03,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:21:03,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149820 states. [2021-02-19 18:21:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149820 to 149786. [2021-02-19 18:21:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149786 states. [2021-02-19 18:21:11,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149786 states to 149786 states and 238898 transitions. [2021-02-19 18:21:11,056 INFO L78 Accepts]: Start accepts. Automaton has 149786 states and 238898 transitions. Word has length 474 [2021-02-19 18:21:11,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:11,057 INFO L480 AbstractCegarLoop]: Abstraction has 149786 states and 238898 transitions. [2021-02-19 18:21:11,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:21:11,057 INFO L276 IsEmpty]: Start isEmpty. Operand 149786 states and 238898 transitions. [2021-02-19 18:21:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2021-02-19 18:21:11,241 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:21:11,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:21:11,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 18:21:11,242 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:21:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:11,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1976828191, now seen corresponding path program 1 times [2021-02-19 18:21:11,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:11,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695781071] [2021-02-19 18:21:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:12,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:12,309 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:12,310 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:12,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:12,316 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:21:12,322 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-19 18:21:12,324 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-19 18:21:12,344 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:12,345 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-19 18:21:12,360 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:12,361 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:13,604 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 421 [2021-02-19 18:21:13,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:21:13,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:13,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:13,629 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:13,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:13,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695781071] [2021-02-19 18:21:13,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:21:13,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-19 18:21:13,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258117055] [2021-02-19 18:21:13,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:21:13,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:13,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:21:13,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:21:13,969 INFO L87 Difference]: Start difference. First operand 149786 states and 238898 transitions. Second operand 6 states. [2021-02-19 18:21:44,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:44,753 INFO L93 Difference]: Finished difference Result 444825 states and 709444 transitions. [2021-02-19 18:21:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:21:44,754 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 474 [2021-02-19 18:21:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:45,416 INFO L225 Difference]: With dead ends: 444825 [2021-02-19 18:21:45,416 INFO L226 Difference]: Without dead ends: 295427 [2021-02-19 18:21:45,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:21:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295427 states. [2021-02-19 18:22:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295427 to 295397. [2021-02-19 18:22:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295397 states. [2021-02-19 18:22:01,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295397 states to 295397 states and 468998 transitions. [2021-02-19 18:22:01,613 INFO L78 Accepts]: Start accepts. Automaton has 295397 states and 468998 transitions. Word has length 474 [2021-02-19 18:22:01,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:01,613 INFO L480 AbstractCegarLoop]: Abstraction has 295397 states and 468998 transitions. [2021-02-19 18:22:01,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-19 18:22:01,613 INFO L276 IsEmpty]: Start isEmpty. Operand 295397 states and 468998 transitions. [2021-02-19 18:22:01,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-02-19 18:22:01,914 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:22:01,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:22:01,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 18:22:01,915 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:22:01,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:01,916 INFO L82 PathProgramCache]: Analyzing trace with hash 184213722, now seen corresponding path program 1 times [2021-02-19 18:22:01,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:01,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212255640] [2021-02-19 18:22:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:01,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:02,598 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:02,599 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:02,600 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:02,600 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:22:02,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:02,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:03,924 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 421 [2021-02-19 18:22:03,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:22:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:03,951 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:03,952 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:04,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212255640] [2021-02-19 18:22:04,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:22:04,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:22:04,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060097705] [2021-02-19 18:22:04,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:22:04,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:04,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:22:04,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:22:04,242 INFO L87 Difference]: Start difference. First operand 295397 states and 468998 transitions. Second operand 4 states. [2021-02-19 18:22:54,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:54,076 INFO L93 Difference]: Finished difference Result 876117 states and 1390321 transitions. [2021-02-19 18:22:54,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:22:54,077 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2021-02-19 18:22:54,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:55,406 INFO L225 Difference]: With dead ends: 876117 [2021-02-19 18:22:55,407 INFO L226 Difference]: Without dead ends: 584358 [2021-02-19 18:22:55,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:22:56,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584358 states.