/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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 14:10:59,013 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 14:10:59,016 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 14:10:59,053 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 14:10:59,054 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 14:10:59,055 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 14:10:59,057 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 14:10:59,060 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 14:10:59,062 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 14:10:59,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 14:10:59,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 14:10:59,066 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 14:10:59,066 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 14:10:59,068 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 14:10:59,069 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 14:10:59,071 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 14:10:59,072 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 14:10:59,073 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 14:10:59,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 14:10:59,078 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 14:10:59,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 14:10:59,100 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 14:10:59,101 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 14:10:59,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 14:10:59,106 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 14:10:59,116 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 14:10:59,117 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 14:10:59,118 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 14:10:59,119 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 [2021-02-23 14:10:59,146 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 14:10:59,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 14:10:59,148 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 14:10:59,149 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 14:10:59,149 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 14:10:59,149 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 14:10:59,149 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 14:10:59,150 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 14:10:59,150 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 14:10:59,150 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 14:10:59,150 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 14:10:59,151 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 14:10:59,151 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 14:10:59,151 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 14:10:59,151 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 14:10:59,151 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 14:10:59,152 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 14:10:59,152 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 14:10:59,152 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 14:10:59,152 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 14:10:59,153 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 14:10:59,153 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 14:10:59,153 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 14:10:59,153 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 14:10:59,154 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 14:10:59,154 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 14:10:59,154 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 14:10:59,154 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 14:10:59,155 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 14:10:59,558 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 14:10:59,608 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 14:10:59,611 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 14:10:59,613 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 14:10:59,613 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 14:10:59,615 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-02-23 14:10:59,695 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eb02b521/c9ca2cef1e574861823c6f9a5703d4f9/FLAG43a390234 [2021-02-23 14:11:00,565 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 14:11:00,566 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-02-23 14:11:00,602 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eb02b521/c9ca2cef1e574861823c6f9a5703d4f9/FLAG43a390234 [2021-02-23 14:11:00,641 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5eb02b521/c9ca2cef1e574861823c6f9a5703d4f9 [2021-02-23 14:11:00,644 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 14:11:00,658 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 14:11:00,659 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 14:11:00,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 14:11:00,667 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 14:11:00,668 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:11:00" (1/1) ... [2021-02-23 14:11:00,669 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@edc1688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:00, skipping insertion in model container [2021-02-23 14:11:00,669 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:11:00" (1/1) ... [2021-02-23 14:11:00,678 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 14:11:00,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 14:11:02,193 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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[56281,56294] [2021-02-23 14:11:02,326 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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[61241,61254] [2021-02-23 14:11:03,069 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:11:03,090 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 14:11:03,966 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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[56281,56294] [2021-02-23 14:11:04,096 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.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c[61241,61254] [2021-02-23 14:11:04,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:11:04,765 INFO L208 MainTranslator]: Completed translation [2021-02-23 14:11:04,766 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:04 WrapperNode [2021-02-23 14:11:04,766 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 14:11:04,767 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 14:11:04,767 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 14:11:04,768 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 14:11:04,783 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:04" (1/1) ... [2021-02-23 14:11:04,788 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:04" (1/1) ... [2021-02-23 14:11:04,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:04" (1/1) ... [2021-02-23 14:11:04,931 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:04" (1/1) ... [2021-02-23 14:11:05,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:04" (1/1) ... [2021-02-23 14:11:05,081 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:04" (1/1) ... [2021-02-23 14:11:05,106 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:04" (1/1) ... [2021-02-23 14:11:05,137 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 14:11:05,139 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 14:11:05,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 14:11:05,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 14:11:05,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:04" (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 [2021-02-23 14:11:05,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 14:11:05,251 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 14:11:05,251 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 14:11:05,251 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 14:11:05,252 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 14:11:05,253 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 14:11:05,253 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 14:11:05,254 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 14:11:05,254 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 14:11:05,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-23 14:11:05,255 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 14:11:05,256 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-23 14:11:05,258 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 14:11:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-23 14:11:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-23 14:11:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-23 14:11:05,259 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-23 14:11:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-23 14:11:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-23 14:11:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2021-02-23 14:11:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-23 14:11:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-23 14:11:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 14:11:05,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 14:11:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 14:11:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 14:11:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 14:11:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 14:11:05,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 14:11:11,342 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 14:11:11,342 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 14:11:11,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:11:11 BoogieIcfgContainer [2021-02-23 14:11:11,350 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 14:11:11,354 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 14:11:11,354 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 14:11:11,357 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 14:11:11,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 02:11:00" (1/3) ... [2021-02-23 14:11:11,359 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e29936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:11:11, skipping insertion in model container [2021-02-23 14:11:11,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:04" (2/3) ... [2021-02-23 14:11:11,360 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e29936 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:11:11, skipping insertion in model container [2021-02-23 14:11:11,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:11:11" (3/3) ... [2021-02-23 14:11:11,362 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-02-23 14:11:11,369 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 14:11:11,378 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-02-23 14:11:11,399 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-02-23 14:11:11,454 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 14:11:11,454 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 14:11:11,454 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 14:11:11,454 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 14:11:11,454 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 14:11:11,455 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 14:11:11,455 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 14:11:11,455 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 14:11:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2021-02-23 14:11:11,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-02-23 14:11:11,570 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:11:11,572 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] [2021-02-23 14:11:11,572 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:11:11,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:11:11,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1279211622, now seen corresponding path program 1 times [2021-02-23 14:11:11,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:11:11,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555343381] [2021-02-23 14:11:11,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:11:12,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:11:12,534 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:12,535 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:12,537 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:12,539 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:11:12,551 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:12,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:11:12,566 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:12,567 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:13,431 WARN L202 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:11:13,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:11:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:11:13,463 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:13,463 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:11:13,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555343381] [2021-02-23 14:11:13,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:11:13,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:11:13,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216082211] [2021-02-23 14:11:13,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:11:13,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:11:13,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:11:13,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:11:13,725 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 5 states. [2021-02-23 14:11:31,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:11:31,031 INFO L93 Difference]: Finished difference Result 3956 states and 6884 transitions. [2021-02-23 14:11:31,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-23 14:11:31,033 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 290 [2021-02-23 14:11:31,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:11:31,078 INFO L225 Difference]: With dead ends: 3956 [2021-02-23 14:11:31,079 INFO L226 Difference]: Without dead ends: 2245 [2021-02-23 14:11:31,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:11:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2021-02-23 14:11:31,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2021-02-23 14:11:31,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2021-02-23 14:11:31,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3871 transitions. [2021-02-23 14:11:31,331 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3871 transitions. Word has length 290 [2021-02-23 14:11:31,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:11:31,335 INFO L480 AbstractCegarLoop]: Abstraction has 2245 states and 3871 transitions. [2021-02-23 14:11:31,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 14:11:31,335 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3871 transitions. [2021-02-23 14:11:31,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-02-23 14:11:31,352 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:11:31,354 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] [2021-02-23 14:11:31,354 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 14:11:31,354 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:11:31,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:11:31,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1783372180, now seen corresponding path program 1 times [2021-02-23 14:11:31,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:11:31,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847477794] [2021-02-23 14:11:31,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:11:31,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:11:31,849 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:31,850 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:31,851 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:31,852 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:11:31,866 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-23 14:11:31,867 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-23 14:11:31,870 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:31,872 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:33,199 WARN L202 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:11:33,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:11:33,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:11:33,227 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:33,228 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:11:33,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847477794] [2021-02-23 14:11:33,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:11:33,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:11:33,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073867520] [2021-02-23 14:11:33,432 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:11:33,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:11:33,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:11:33,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:11:33,434 INFO L87 Difference]: Start difference. First operand 2245 states and 3871 transitions. Second operand 4 states. [2021-02-23 14:11:34,681 WARN L202 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 426 [2021-02-23 14:12:00,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:00,735 INFO L93 Difference]: Finished difference Result 5464 states and 9356 transitions. [2021-02-23 14:12:00,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:00,737 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2021-02-23 14:12:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:00,759 INFO L225 Difference]: With dead ends: 5464 [2021-02-23 14:12:00,759 INFO L226 Difference]: Without dead ends: 3801 [2021-02-23 14:12:00,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:12:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-02-23 14:12:00,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3797. [2021-02-23 14:12:00,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3797 states. [2021-02-23 14:12:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6464 transitions. [2021-02-23 14:12:00,889 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6464 transitions. Word has length 349 [2021-02-23 14:12:00,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:00,891 INFO L480 AbstractCegarLoop]: Abstraction has 3797 states and 6464 transitions. [2021-02-23 14:12:00,891 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:00,891 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6464 transitions. [2021-02-23 14:12:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-02-23 14:12:00,905 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:00,905 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] [2021-02-23 14:12:00,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 14:12:00,906 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:00,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:00,906 INFO L82 PathProgramCache]: Analyzing trace with hash 550393478, now seen corresponding path program 1 times [2021-02-23 14:12:00,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:00,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429274171] [2021-02-23 14:12:00,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:01,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:01,181 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:01,182 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:01,183 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:01,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:12:01,189 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:01,189 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:02,404 WARN L202 SmtUtils]: Spent 1.20 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:12:02,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:02,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:02,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:02,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:12:02,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429274171] [2021-02-23 14:12:02,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:02,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:02,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457153543] [2021-02-23 14:12:02,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:02,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:02,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:02,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:02,580 INFO L87 Difference]: Start difference. First operand 3797 states and 6464 transitions. Second operand 4 states. [2021-02-23 14:12:03,829 WARN L202 SmtUtils]: Spent 1.19 s on a formula simplification that was a NOOP. DAG size: 428 [2021-02-23 14:12:27,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:27,899 INFO L93 Difference]: Finished difference Result 6370 states and 10871 transitions. [2021-02-23 14:12:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:27,900 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 353 [2021-02-23 14:12:27,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:27,925 INFO L225 Difference]: With dead ends: 6370 [2021-02-23 14:12:27,926 INFO L226 Difference]: Without dead ends: 4697 [2021-02-23 14:12:27,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:12:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4697 states. [2021-02-23 14:12:28,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4697 to 4693. [2021-02-23 14:12:28,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4693 states. [2021-02-23 14:12:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 7996 transitions. [2021-02-23 14:12:28,103 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 7996 transitions. Word has length 353 [2021-02-23 14:12:28,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:28,105 INFO L480 AbstractCegarLoop]: Abstraction has 4693 states and 7996 transitions. [2021-02-23 14:12:28,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:28,105 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 7996 transitions. [2021-02-23 14:12:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-02-23 14:12:28,123 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:28,124 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] [2021-02-23 14:12:28,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 14:12:28,125 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:28,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:28,126 INFO L82 PathProgramCache]: Analyzing trace with hash 930517555, now seen corresponding path program 1 times [2021-02-23 14:12:28,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:28,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384408631] [2021-02-23 14:12:28,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:28,490 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:28,491 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:28,492 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:28,492 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:12:28,497 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-23 14:12:28,498 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-23 14:12:28,499 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:28,500 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:29,700 WARN L202 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:12:29,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:29,725 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:29,726 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:29,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:12:29,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384408631] [2021-02-23 14:12:29,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:29,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:29,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780907263] [2021-02-23 14:12:29,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:29,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:29,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:29,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:29,885 INFO L87 Difference]: Start difference. First operand 4693 states and 7996 transitions. Second operand 4 states. [2021-02-23 14:12:31,151 WARN L202 SmtUtils]: Spent 1.21 s on a formula simplification that was a NOOP. DAG size: 426 [2021-02-23 14:12:57,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:57,361 INFO L93 Difference]: Finished difference Result 12615 states and 21382 transitions. [2021-02-23 14:12:57,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:12:57,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 357 [2021-02-23 14:12:57,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:57,401 INFO L225 Difference]: With dead ends: 12615 [2021-02-23 14:12:57,401 INFO L226 Difference]: Without dead ends: 8527 [2021-02-23 14:12:57,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:12:57,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2021-02-23 14:12:57,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 8523. [2021-02-23 14:12:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8523 states. [2021-02-23 14:12:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 14421 transitions. [2021-02-23 14:12:57,730 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 14421 transitions. Word has length 357 [2021-02-23 14:12:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:57,730 INFO L480 AbstractCegarLoop]: Abstraction has 8523 states and 14421 transitions. [2021-02-23 14:12:57,730 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:57,731 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 14421 transitions. [2021-02-23 14:12:57,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-02-23 14:12:57,753 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:57,754 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] [2021-02-23 14:12:57,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 14:12:57,755 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:57,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:57,758 INFO L82 PathProgramCache]: Analyzing trace with hash 144934953, now seen corresponding path program 1 times [2021-02-23 14:12:57,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:57,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410742444] [2021-02-23 14:12:57,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:57,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:57,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:57,981 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:57,982 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:57,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:12:57,987 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:57,988 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:59,220 WARN L202 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:12:59,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:59,248 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:59,249 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:12:59,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410742444] [2021-02-23 14:12:59,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:59,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:59,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193957353] [2021-02-23 14:12:59,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:59,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:59,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:59,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:59,468 INFO L87 Difference]: Start difference. First operand 8523 states and 14421 transitions. Second operand 4 states. [2021-02-23 14:13:00,759 WARN L202 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 428 [2021-02-23 14:13:25,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:25,755 INFO L93 Difference]: Finished difference Result 15288 states and 25910 transitions. [2021-02-23 14:13:25,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:13:25,756 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 361 [2021-02-23 14:13:25,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:25,799 INFO L225 Difference]: With dead ends: 15288 [2021-02-23 14:13:25,799 INFO L226 Difference]: Without dead ends: 11190 [2021-02-23 14:13:25,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:13:25,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2021-02-23 14:13:26,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 11186. [2021-02-23 14:13:26,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11186 states. [2021-02-23 14:13:26,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11186 states to 11186 states and 18931 transitions. [2021-02-23 14:13:26,167 INFO L78 Accepts]: Start accepts. Automaton has 11186 states and 18931 transitions. Word has length 361 [2021-02-23 14:13:26,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:26,168 INFO L480 AbstractCegarLoop]: Abstraction has 11186 states and 18931 transitions. [2021-02-23 14:13:26,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:26,168 INFO L276 IsEmpty]: Start isEmpty. Operand 11186 states and 18931 transitions. [2021-02-23 14:13:26,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-02-23 14:13:26,190 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:26,191 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] [2021-02-23 14:13:26,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 14:13:26,191 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:26,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:26,192 INFO L82 PathProgramCache]: Analyzing trace with hash 910411292, now seen corresponding path program 1 times [2021-02-23 14:13:26,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:26,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785802664] [2021-02-23 14:13:26,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:26,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:26,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:26,508 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:26,509 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:26,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:13:26,513 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-23 14:13:26,514 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-23 14:13:26,515 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:26,515 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:27,671 WARN L202 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:13:27,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:27,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:27,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:27,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:27,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:13:27,847 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785802664] [2021-02-23 14:13:27,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:27,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:27,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538215998] [2021-02-23 14:13:27,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:27,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:27,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:27,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:27,850 INFO L87 Difference]: Start difference. First operand 11186 states and 18931 transitions. Second operand 4 states. [2021-02-23 14:13:29,151 WARN L202 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 426 [2021-02-23 14:13:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:57,765 INFO L93 Difference]: Finished difference Result 31564 states and 53193 transitions. [2021-02-23 14:13:57,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:13:57,766 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 365 [2021-02-23 14:13:57,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:57,814 INFO L225 Difference]: With dead ends: 31564 [2021-02-23 14:13:57,815 INFO L226 Difference]: Without dead ends: 21006 [2021-02-23 14:13:57,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:13:57,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21006 states. [2021-02-23 14:13:58,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21006 to 21002. [2021-02-23 14:13:58,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21002 states. [2021-02-23 14:13:58,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21002 states to 21002 states and 35288 transitions. [2021-02-23 14:13:58,523 INFO L78 Accepts]: Start accepts. Automaton has 21002 states and 35288 transitions. Word has length 365 [2021-02-23 14:13:58,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:58,524 INFO L480 AbstractCegarLoop]: Abstraction has 21002 states and 35288 transitions. [2021-02-23 14:13:58,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:58,524 INFO L276 IsEmpty]: Start isEmpty. Operand 21002 states and 35288 transitions. [2021-02-23 14:13:58,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-02-23 14:13:58,563 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:58,563 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] [2021-02-23 14:13:58,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 14:13:58,564 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:58,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:58,564 INFO L82 PathProgramCache]: Analyzing trace with hash 744427582, now seen corresponding path program 1 times [2021-02-23 14:13:58,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:58,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303099324] [2021-02-23 14:13:58,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:58,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:58,787 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:58,787 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:58,788 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:58,789 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:13:58,794 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:58,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:00,113 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:14:00,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:00,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:00,144 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:00,145 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:00,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:14:00,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303099324] [2021-02-23 14:14:00,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:00,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:14:00,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445568227] [2021-02-23 14:14:00,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:14:00,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:00,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:14:00,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:00,331 INFO L87 Difference]: Start difference. First operand 21002 states and 35288 transitions. Second operand 4 states. [2021-02-23 14:14:01,747 WARN L202 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 428 [2021-02-23 14:14:27,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:27,114 INFO L93 Difference]: Finished difference Result 38803 states and 65367 transitions. [2021-02-23 14:14:27,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:27,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 369 [2021-02-23 14:14:27,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:27,184 INFO L225 Difference]: With dead ends: 38803 [2021-02-23 14:14:27,185 INFO L226 Difference]: Without dead ends: 28235 [2021-02-23 14:14:27,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:14:27,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28235 states. [2021-02-23 14:14:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28235 to 28231. [2021-02-23 14:14:28,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28231 states. [2021-02-23 14:14:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28231 states to 28231 states and 47446 transitions. [2021-02-23 14:14:28,235 INFO L78 Accepts]: Start accepts. Automaton has 28231 states and 47446 transitions. Word has length 369 [2021-02-23 14:14:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:28,236 INFO L480 AbstractCegarLoop]: Abstraction has 28231 states and 47446 transitions. [2021-02-23 14:14:28,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:14:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 28231 states and 47446 transitions. [2021-02-23 14:14:28,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-02-23 14:14:28,308 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:28,308 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] [2021-02-23 14:14:28,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 14:14:28,309 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:28,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1936796331, now seen corresponding path program 1 times [2021-02-23 14:14:28,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:28,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832914575] [2021-02-23 14:14:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:28,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:28,547 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:28,548 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:28,549 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:28,550 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:14:28,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:28,554 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:29,912 WARN L202 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:14:29,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:29,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:29,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:30,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:14:30,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832914575] [2021-02-23 14:14:30,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:30,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:14:30,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687629264] [2021-02-23 14:14:30,043 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:14:30,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:30,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:14:30,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:30,044 INFO L87 Difference]: Start difference. First operand 28231 states and 47446 transitions. Second operand 4 states. [2021-02-23 14:14:31,370 WARN L202 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 426 [2021-02-23 14:14:59,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:59,550 INFO L93 Difference]: Finished difference Result 81223 states and 135938 transitions. [2021-02-23 14:14:59,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:59,551 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 373 [2021-02-23 14:14:59,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:59,654 INFO L225 Difference]: With dead ends: 81223 [2021-02-23 14:14:59,655 INFO L226 Difference]: Without dead ends: 53643 [2021-02-23 14:14:59,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:14:59,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53643 states. [2021-02-23 14:15:01,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53643 to 53639. [2021-02-23 14:15:01,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53639 states. [2021-02-23 14:15:01,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53639 states to 53639 states and 89423 transitions. [2021-02-23 14:15:01,829 INFO L78 Accepts]: Start accepts. Automaton has 53639 states and 89423 transitions. Word has length 373 [2021-02-23 14:15:01,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:15:01,829 INFO L480 AbstractCegarLoop]: Abstraction has 53639 states and 89423 transitions. [2021-02-23 14:15:01,830 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:15:01,830 INFO L276 IsEmpty]: Start isEmpty. Operand 53639 states and 89423 transitions. [2021-02-23 14:15:01,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-02-23 14:15:01,880 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:15:01,880 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] [2021-02-23 14:15:01,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 14:15:01,881 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:15:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:15:01,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1101836431, now seen corresponding path program 1 times [2021-02-23 14:15:01,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:15:01,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828004393] [2021-02-23 14:15:01,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:15:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:02,374 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:02,375 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:02,376 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:02,377 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:15:02,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:02,385 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:03,714 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:15:03,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:15:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:03,737 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:03,738 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:03,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:15:03,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828004393] [2021-02-23 14:15:03,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:15:03,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:15:03,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587800084] [2021-02-23 14:15:03,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:15:03,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:15:03,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:15:03,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:15:03,917 INFO L87 Difference]: Start difference. First operand 53639 states and 89423 transitions. Second operand 4 states. [2021-02-23 14:15:05,292 WARN L202 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 428 [2021-02-23 14:15:32,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:15:32,022 INFO L93 Difference]: Finished difference Result 100010 states and 167236 transitions. [2021-02-23 14:15:32,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:15:32,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 377 [2021-02-23 14:15:32,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:15:32,140 INFO L225 Difference]: With dead ends: 100010 [2021-02-23 14:15:32,141 INFO L226 Difference]: Without dead ends: 72420 [2021-02-23 14:15:32,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:15:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72420 states. [2021-02-23 14:15:34,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72420 to 72416. [2021-02-23 14:15:34,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72416 states. [2021-02-23 14:15:34,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72416 states to 72416 states and 120709 transitions. [2021-02-23 14:15:34,792 INFO L78 Accepts]: Start accepts. Automaton has 72416 states and 120709 transitions. Word has length 377 [2021-02-23 14:15:34,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:15:34,793 INFO L480 AbstractCegarLoop]: Abstraction has 72416 states and 120709 transitions. [2021-02-23 14:15:34,793 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:15:34,793 INFO L276 IsEmpty]: Start isEmpty. Operand 72416 states and 120709 transitions. [2021-02-23 14:15:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-02-23 14:15:34,869 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:15:34,869 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] [2021-02-23 14:15:34,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 14:15:34,870 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:15:34,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:15:34,871 INFO L82 PathProgramCache]: Analyzing trace with hash -408938844, now seen corresponding path program 1 times [2021-02-23 14:15:34,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:15:34,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640800250] [2021-02-23 14:15:34,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:15:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:35,080 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:35,081 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:35,082 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:35,083 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:15:35,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:35,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:36,608 WARN L202 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:15:36,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:15:36,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:36,629 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:36,630 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:15:36,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640800250] [2021-02-23 14:15:36,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:15:36,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:15:36,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982830278] [2021-02-23 14:15:36,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:15:36,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:15:36,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:15:36,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:15:36,747 INFO L87 Difference]: Start difference. First operand 72416 states and 120709 transitions. Second operand 4 states. [2021-02-23 14:15:38,094 WARN L202 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 426 [2021-02-23 14:16:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:16:10,315 INFO L93 Difference]: Finished difference Result 209486 states and 347551 transitions. [2021-02-23 14:16:10,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:16:10,316 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 381 [2021-02-23 14:16:10,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:16:10,587 INFO L225 Difference]: With dead ends: 209486 [2021-02-23 14:16:10,587 INFO L226 Difference]: Without dead ends: 137744 [2021-02-23 14:16:10,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:16:10,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137744 states. [2021-02-23 14:16:14,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137744 to 137740. [2021-02-23 14:16:14,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137740 states. [2021-02-23 14:16:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137740 states to 137740 states and 227422 transitions. [2021-02-23 14:16:15,414 INFO L78 Accepts]: Start accepts. Automaton has 137740 states and 227422 transitions. Word has length 381 [2021-02-23 14:16:15,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:16:15,415 INFO L480 AbstractCegarLoop]: Abstraction has 137740 states and 227422 transitions. [2021-02-23 14:16:15,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:16:15,415 INFO L276 IsEmpty]: Start isEmpty. Operand 137740 states and 227422 transitions. [2021-02-23 14:16:15,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-02-23 14:16:15,822 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:16:15,823 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] [2021-02-23 14:16:15,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 14:16:15,823 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:16:15,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:16:15,824 INFO L82 PathProgramCache]: Analyzing trace with hash 921712118, now seen corresponding path program 1 times [2021-02-23 14:16:15,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:16:15,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688390426] [2021-02-23 14:16:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:16:15,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:16,053 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:16,054 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:16,055 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:16,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:16:16,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:16,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:17,424 WARN L202 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:16:17,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:16:17,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:17,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:17,446 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:16:17,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688390426] [2021-02-23 14:16:17,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:16:17,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:16:17,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370586322] [2021-02-23 14:16:17,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:16:17,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:16:17,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:16:17,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:16:17,659 INFO L87 Difference]: Start difference. First operand 137740 states and 227422 transitions. Second operand 4 states. [2021-02-23 14:16:19,041 WARN L202 SmtUtils]: Spent 1.32 s on a formula simplification that was a NOOP. DAG size: 428 [2021-02-23 14:16:50,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:16:50,279 INFO L93 Difference]: Finished difference Result 256489 states and 424821 transitions. [2021-02-23 14:16:50,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:16:50,280 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 385 [2021-02-23 14:16:50,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:16:50,704 INFO L225 Difference]: With dead ends: 256489 [2021-02-23 14:16:50,704 INFO L226 Difference]: Without dead ends: 184737 [2021-02-23 14:16:50,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:16:50,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184737 states. [2021-02-23 14:16:57,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184737 to 184733. [2021-02-23 14:16:57,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184733 states. [2021-02-23 14:16:58,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184733 states to 184733 states and 304688 transitions. [2021-02-23 14:16:58,222 INFO L78 Accepts]: Start accepts. Automaton has 184733 states and 304688 transitions. Word has length 385 [2021-02-23 14:16:58,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:16:58,224 INFO L480 AbstractCegarLoop]: Abstraction has 184733 states and 304688 transitions. [2021-02-23 14:16:58,224 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:16:58,224 INFO L276 IsEmpty]: Start isEmpty. Operand 184733 states and 304688 transitions. [2021-02-23 14:16:58,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-02-23 14:16:58,359 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:16:58,359 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] [2021-02-23 14:16:58,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 14:16:58,360 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:16:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:16:58,360 INFO L82 PathProgramCache]: Analyzing trace with hash -418029789, now seen corresponding path program 1 times [2021-02-23 14:16:58,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:16:58,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577577397] [2021-02-23 14:16:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:16:58,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:58,662 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:58,663 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:58,669 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:58,671 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-23 14:16:58,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:58,683 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:16:58,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:58,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:16:58,917 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:58,918 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 14:16:58,936 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:58,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-23 14:16:58,955 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:58,956 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-23 14:16:58,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:58,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:17:00,495 WARN L202 SmtUtils]: Spent 1.50 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:17:00,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:17:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:17:00,524 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:17:00,525 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:17:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:17:00,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577577397] [2021-02-23 14:17:00,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:17:00,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-23 14:17:00,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599578336] [2021-02-23 14:17:00,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-23 14:17:00,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:17:00,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-23 14:17:00,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-23 14:17:00,777 INFO L87 Difference]: Start difference. First operand 184733 states and 304688 transitions. Second operand 8 states. [2021-02-23 14:17:02,262 WARN L202 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 432 [2021-02-23 14:18:25,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:18:25,986 INFO L93 Difference]: Finished difference Result 1193777 states and 1977333 transitions. [2021-02-23 14:18:25,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-23 14:18:25,987 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 389 [2021-02-23 14:18:25,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:18:28,318 INFO L225 Difference]: With dead ends: 1193777 [2021-02-23 14:18:28,319 INFO L226 Difference]: Without dead ends: 1009721 [2021-02-23 14:18:28,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-02-23 14:18:29,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009721 states. [2021-02-23 14:19:01,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009721 to 520028. [2021-02-23 14:19:01,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520028 states. [2021-02-23 14:19:04,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520028 states to 520028 states and 856980 transitions. [2021-02-23 14:19:04,042 INFO L78 Accepts]: Start accepts. Automaton has 520028 states and 856980 transitions. Word has length 389 [2021-02-23 14:19:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:19:04,043 INFO L480 AbstractCegarLoop]: Abstraction has 520028 states and 856980 transitions. [2021-02-23 14:19:04,043 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-23 14:19:04,043 INFO L276 IsEmpty]: Start isEmpty. Operand 520028 states and 856980 transitions. [2021-02-23 14:19:04,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-02-23 14:19:04,461 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:19:04,461 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] [2021-02-23 14:19:04,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 14:19:04,462 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:19:04,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:19:04,462 INFO L82 PathProgramCache]: Analyzing trace with hash 537442565, now seen corresponding path program 1 times [2021-02-23 14:19:04,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:19:04,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605229085] [2021-02-23 14:19:04,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:19:04,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:19:04,684 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:04,685 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:19:04,688 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:04,689 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:19:04,695 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:04,696 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:19:04,706 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:04,707 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:19:06,585 WARN L202 SmtUtils]: Spent 1.85 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-23 14:19:06,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:19:06,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:19:06,604 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:19:06,604 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:19:07,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:19:07,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605229085] [2021-02-23 14:19:07,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:19:07,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:19:07,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843821354] [2021-02-23 14:19:07,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:19:07,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:19:07,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:19:07,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:19:07,057 INFO L87 Difference]: Start difference. First operand 520028 states and 856980 transitions. Second operand 5 states. [2021-02-23 14:19:08,291 WARN L202 SmtUtils]: Spent 1.15 s on a formula simplification that was a NOOP. DAG size: 427