/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-b7b32d2 [2021-02-19 18:17:36,249 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:17:36,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:17:36,294 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-19 18:17:36,294 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-19 18:17:36,296 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-19 18:17:36,298 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-19 18:17:36,300 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-19 18:17:36,302 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-19 18:17:36,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-19 18:17:36,305 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-19 18:17:36,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-19 18:17:36,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-19 18:17:36,308 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-19 18:17:36,310 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-19 18:17:36,311 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-19 18:17:36,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-19 18:17:36,329 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-19 18:17:36,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-19 18:17:36,337 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-19 18:17:36,345 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-19 18:17:36,347 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-19 18:17:36,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-19 18:17:36,352 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-19 18:17:36,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-19 18:17:36,378 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-19 18:17:36,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-19 18:17:36,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-19 18:17:36,382 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-19 18:17:36,440 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:17:36,440 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:17:36,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:17:36,445 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:17:36,446 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:17:36,447 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:17:36,447 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:17:36,447 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:17:36,447 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:17:36,448 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:17:36,448 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:17:36,449 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:17:36,449 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:17:36,449 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:17:36,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:17:36,450 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:17:36,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:17:36,450 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:17:36,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:17:36,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:17:36,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:17:36,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:17:36,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:17:36,452 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:17:36,452 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:17:36,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:17:36,452 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:17:36,452 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-19 18:17:36,453 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:17:36,850 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:17:36,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:17:36,894 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:17:36,895 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-19 18:17:36,896 INFO L275 PluginConnector]: CDTParser initialized [2021-02-19 18:17:36,897 INFO L432 ainManager$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 [2021-02-19 18:17:36,977 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72bdbaf83/f1844c4519a64a79a3a4954b96720e64/FLAG7230fdbb6 [2021-02-19 18:17:37,950 INFO L306 CDTParser]: Found 1 translation units. [2021-02-19 18:17:37,951 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 [2021-02-19 18:17:38,004 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72bdbaf83/f1844c4519a64a79a3a4954b96720e64/FLAG7230fdbb6 [2021-02-19 18:17:38,435 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/72bdbaf83/f1844c4519a64a79a3a4954b96720e64 [2021-02-19 18:17:38,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:17:38,452 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:17:38,454 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-19 18:17:38,454 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-19 18:17:38,458 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-19 18:17:38,459 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:17:38" (1/1) ... [2021-02-19 18:17:38,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@696d93f4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:38, skipping insertion in model container [2021-02-19 18:17:38,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.02 06:17:38" (1/1) ... [2021-02-19 18:17:38,470 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-19 18:17:38,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-19 18:17:40,067 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] [2021-02-19 18:17:40,212 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] [2021-02-19 18:17:40,945 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:17:40,963 INFO L203 MainTranslator]: Completed pre-run [2021-02-19 18:17:41,676 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] [2021-02-19 18:17:41,832 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] [2021-02-19 18:17:42,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-19 18:17:42,500 INFO L208 MainTranslator]: Completed translation [2021-02-19 18:17:42,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:42 WrapperNode [2021-02-19 18:17:42,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-19 18:17:42,502 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:17:42,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:17:42,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:17:42,517 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:42" (1/1) ... [2021-02-19 18:17:42,518 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:42" (1/1) ... [2021-02-19 18:17:42,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:42" (1/1) ... [2021-02-19 18:17:42,607 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:42" (1/1) ... [2021-02-19 18:17:42,741 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:42" (1/1) ... [2021-02-19 18:17:42,801 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:42" (1/1) ... [2021-02-19 18:17:42,825 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:42" (1/1) ... [2021-02-19 18:17:42,860 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:17:42,861 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:17:42,861 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:17:42,861 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:17:42,862 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:17:42,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-19 18:17:42,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:17:42,967 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-19 18:17:42,967 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-19 18:17:42,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-19 18:17:42,968 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-19 18:17:42,968 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-19 18:17:42,968 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-19 18:17:42,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-19 18:17:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-19 18:17:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-19 18:17:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-19 18:17:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-19 18:17:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-19 18:17:42,969 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-19 18:17:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-19 18:17:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-19 18:17:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-19 18:17:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-19 18:17:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2021-02-19 18:17:42,970 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-19 18:17:42,971 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-19 18:17:42,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-19 18:17:42,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-19 18:17:42,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-19 18:17:42,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:17:42,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-19 18:17:42,972 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-19 18:17:42,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-19 18:17:49,232 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:17:49,233 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:17:49,237 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:17:49 BoogieIcfgContainer [2021-02-19 18:17:49,238 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:17:49,240 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:17:49,240 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:17:49,243 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:17:49,244 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.02 06:17:38" (1/3) ... [2021-02-19 18:17:49,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba32d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:17:49, skipping insertion in model container [2021-02-19 18:17:49,245 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.02 06:17:42" (2/3) ... [2021-02-19 18:17:49,245 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ba32d2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:17:49, skipping insertion in model container [2021-02-19 18:17:49,246 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:17:49" (3/3) ... [2021-02-19 18:17:49,247 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.4.ufo.BOUNDED-10.pals.c.p+lhb-reducer.c [2021-02-19 18:17:49,254 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:17:49,262 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-02-19 18:17:49,282 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-02-19 18:17:49,322 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:17:49,322 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:17:49,322 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:17:49,322 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:17:49,323 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:17:49,323 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:17:49,323 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:17:49,323 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:17:49,382 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states. [2021-02-19 18:17:49,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-02-19 18:17:49,423 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:17:49,424 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] [2021-02-19 18:17:49,425 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:17:49,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:17:49,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1279211622, now seen corresponding path program 1 times [2021-02-19 18:17:49,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:17:49,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623011345] [2021-02-19 18:17:49,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:17:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:17:50,383 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:50,384 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:17:50,385 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:50,386 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:17:50,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:50,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:17:50,407 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:50,408 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:17:51,525 WARN L202 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:17:51,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:17:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:17:51,560 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:17:51,561 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:17:51,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:17:51,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623011345] [2021-02-19 18:17:51,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:17:51,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:17:51,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262904825] [2021-02-19 18:17:51,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:17:51,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:17:51,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:17:51,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:17:51,715 INFO L87 Difference]: Start difference. First operand 2249 states. Second operand 5 states. [2021-02-19 18:18:08,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:18:08,119 INFO L93 Difference]: Finished difference Result 3956 states and 6884 transitions. [2021-02-19 18:18:08,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:18:08,121 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 290 [2021-02-19 18:18:08,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:18:08,158 INFO L225 Difference]: With dead ends: 3956 [2021-02-19 18:18:08,159 INFO L226 Difference]: Without dead ends: 2245 [2021-02-19 18:18:08,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:18:08,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2245 states. [2021-02-19 18:18:08,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2245 to 2245. [2021-02-19 18:18:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2245 states. [2021-02-19 18:18:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 3871 transitions. [2021-02-19 18:18:08,351 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 3871 transitions. Word has length 290 [2021-02-19 18:18:08,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:18:08,355 INFO L480 AbstractCegarLoop]: Abstraction has 2245 states and 3871 transitions. [2021-02-19 18:18:08,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-19 18:18:08,355 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 3871 transitions. [2021-02-19 18:18:08,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2021-02-19 18:18:08,375 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:18:08,375 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] [2021-02-19 18:18:08,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:18:08,376 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:18:08,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:18:08,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1783372180, now seen corresponding path program 1 times [2021-02-19 18:18:08,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:18:08,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67501738] [2021-02-19 18:18:08,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:18:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:18:08,742 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:08,742 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:08,743 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:08,744 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:18:08,752 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-19 18:18:08,753 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-19 18:18:08,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:08,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:10,039 WARN L202 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:18:10,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:18:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:18:10,066 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:10,067 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:18:10,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67501738] [2021-02-19 18:18:10,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:18:10,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:18:10,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085050101] [2021-02-19 18:18:10,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:18:10,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:18:10,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:18:10,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:18:10,259 INFO L87 Difference]: Start difference. First operand 2245 states and 3871 transitions. Second operand 4 states. [2021-02-19 18:18:11,478 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 426 [2021-02-19 18:18:37,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:18:37,090 INFO L93 Difference]: Finished difference Result 5464 states and 9356 transitions. [2021-02-19 18:18:37,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:18:37,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 349 [2021-02-19 18:18:37,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:18:37,114 INFO L225 Difference]: With dead ends: 5464 [2021-02-19 18:18:37,115 INFO L226 Difference]: Without dead ends: 3801 [2021-02-19 18:18:37,119 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 [2021-02-19 18:18:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-02-19 18:18:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3797. [2021-02-19 18:18:37,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3797 states. [2021-02-19 18:18:37,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 6464 transitions. [2021-02-19 18:18:37,250 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 6464 transitions. Word has length 349 [2021-02-19 18:18:37,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:18:37,251 INFO L480 AbstractCegarLoop]: Abstraction has 3797 states and 6464 transitions. [2021-02-19 18:18:37,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:18:37,251 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 6464 transitions. [2021-02-19 18:18:37,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2021-02-19 18:18:37,265 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:18:37,265 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] [2021-02-19 18:18:37,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 18:18:37,266 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:18:37,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:18:37,267 INFO L82 PathProgramCache]: Analyzing trace with hash 550393478, now seen corresponding path program 1 times [2021-02-19 18:18:37,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:18:37,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574243077] [2021-02-19 18:18:37,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:18:37,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:18:37,508 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:37,509 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:37,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:37,510 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:18:37,516 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:37,516 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:38,624 WARN L202 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:18:38,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:18:38,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:18:38,661 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:18:38,662 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:18:38,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:18:38,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574243077] [2021-02-19 18:18:38,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:18:38,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:18:38,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654937444] [2021-02-19 18:18:38,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:18:38,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:18:38,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:18:38,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:18:38,792 INFO L87 Difference]: Start difference. First operand 3797 states and 6464 transitions. Second operand 4 states. [2021-02-19 18:18:40,003 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 428 [2021-02-19 18:19:03,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:19:03,351 INFO L93 Difference]: Finished difference Result 6370 states and 10871 transitions. [2021-02-19 18:19:03,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:19:03,352 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 353 [2021-02-19 18:19:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:19:03,377 INFO L225 Difference]: With dead ends: 6370 [2021-02-19 18:19:03,377 INFO L226 Difference]: Without dead ends: 4697 [2021-02-19 18:19:03,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:19:03,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4697 states. [2021-02-19 18:19:03,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4697 to 4693. [2021-02-19 18:19:03,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4693 states. [2021-02-19 18:19:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 7996 transitions. [2021-02-19 18:19:03,531 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 7996 transitions. Word has length 353 [2021-02-19 18:19:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:19:03,532 INFO L480 AbstractCegarLoop]: Abstraction has 4693 states and 7996 transitions. [2021-02-19 18:19:03,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:19:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 7996 transitions. [2021-02-19 18:19:03,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2021-02-19 18:19:03,549 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:19:03,549 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] [2021-02-19 18:19:03,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-19 18:19:03,550 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:19:03,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:19:03,551 INFO L82 PathProgramCache]: Analyzing trace with hash 930517555, now seen corresponding path program 1 times [2021-02-19 18:19:03,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:19:03,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920647870] [2021-02-19 18:19:03,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:19:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:03,970 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:03,971 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:03,972 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:03,973 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:19:03,978 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-19 18:19:03,979 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-19 18:19:03,979 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:03,980 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:05,096 WARN L202 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:19:05,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:19:05,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:05,127 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:05,128 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:05,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:19:05,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920647870] [2021-02-19 18:19:05,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:19:05,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:19:05,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977656436] [2021-02-19 18:19:05,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:19:05,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:19:05,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:19:05,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:19:05,265 INFO L87 Difference]: Start difference. First operand 4693 states and 7996 transitions. Second operand 4 states. [2021-02-19 18:19:06,467 WARN L202 SmtUtils]: Spent 1.14 s on a formula simplification that was a NOOP. DAG size: 426 [2021-02-19 18:19:31,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:19:31,427 INFO L93 Difference]: Finished difference Result 12615 states and 21382 transitions. [2021-02-19 18:19:31,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:19:31,428 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 357 [2021-02-19 18:19:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:19:31,466 INFO L225 Difference]: With dead ends: 12615 [2021-02-19 18:19:31,466 INFO L226 Difference]: Without dead ends: 8527 [2021-02-19 18:19:31,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:19:31,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8527 states. [2021-02-19 18:19:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8527 to 8523. [2021-02-19 18:19:31,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8523 states. [2021-02-19 18:19:31,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8523 states to 8523 states and 14421 transitions. [2021-02-19 18:19:31,757 INFO L78 Accepts]: Start accepts. Automaton has 8523 states and 14421 transitions. Word has length 357 [2021-02-19 18:19:31,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:19:31,757 INFO L480 AbstractCegarLoop]: Abstraction has 8523 states and 14421 transitions. [2021-02-19 18:19:31,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:19:31,758 INFO L276 IsEmpty]: Start isEmpty. Operand 8523 states and 14421 transitions. [2021-02-19 18:19:31,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2021-02-19 18:19:31,782 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:19:31,782 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] [2021-02-19 18:19:31,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-19 18:19:31,783 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:19:31,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:19:31,784 INFO L82 PathProgramCache]: Analyzing trace with hash 144934953, now seen corresponding path program 1 times [2021-02-19 18:19:31,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:19:31,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109682915] [2021-02-19 18:19:31,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:19:31,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:32,021 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:32,023 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:32,024 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:32,025 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:19:32,031 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:32,032 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:33,234 WARN L202 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:19:33,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:19:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:33,265 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:33,266 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:19:33,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109682915] [2021-02-19 18:19:33,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:19:33,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:19:33,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231972284] [2021-02-19 18:19:33,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:19:33,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:19:33,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:19:33,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:19:33,374 INFO L87 Difference]: Start difference. First operand 8523 states and 14421 transitions. Second operand 4 states. [2021-02-19 18:19:34,593 WARN L202 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 428 [2021-02-19 18:19:58,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:19:58,800 INFO L93 Difference]: Finished difference Result 15288 states and 25910 transitions. [2021-02-19 18:19:58,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:19:58,802 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 361 [2021-02-19 18:19:58,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:19:58,849 INFO L225 Difference]: With dead ends: 15288 [2021-02-19 18:19:58,850 INFO L226 Difference]: Without dead ends: 11190 [2021-02-19 18:19:58,861 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:19:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11190 states. [2021-02-19 18:19:59,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11190 to 11186. [2021-02-19 18:19:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11186 states. [2021-02-19 18:19:59,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11186 states to 11186 states and 18931 transitions. [2021-02-19 18:19:59,289 INFO L78 Accepts]: Start accepts. Automaton has 11186 states and 18931 transitions. Word has length 361 [2021-02-19 18:19:59,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:19:59,290 INFO L480 AbstractCegarLoop]: Abstraction has 11186 states and 18931 transitions. [2021-02-19 18:19:59,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:19:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 11186 states and 18931 transitions. [2021-02-19 18:19:59,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 366 [2021-02-19 18:19:59,317 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:19:59,318 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] [2021-02-19 18:19:59,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-19 18:19:59,318 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:19:59,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:19:59,319 INFO L82 PathProgramCache]: Analyzing trace with hash 910411292, now seen corresponding path program 1 times [2021-02-19 18:19:59,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:19:59,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658671892] [2021-02-19 18:19:59,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:19:59,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:19:59,608 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:59,609 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:19:59,610 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:59,610 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:19:59,614 WARN L141 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size [2021-02-19 18:19:59,615 WARN L147 QuantifierPusher]: treesize reduction 6, result has 14.3 percent of original size 1 [2021-02-19 18:19:59,616 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:19:59,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:00,705 WARN L202 SmtUtils]: Spent 1.07 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:20:00,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:20:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:00,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:00,734 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:00,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:00,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658671892] [2021-02-19 18:20:00,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:20:00,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:20:00,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601727426] [2021-02-19 18:20:00,877 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:20:00,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:00,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:20:00,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:00,879 INFO L87 Difference]: Start difference. First operand 11186 states and 18931 transitions. Second operand 4 states. [2021-02-19 18:20:02,162 WARN L202 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 426 [2021-02-19 18:20:30,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:30,152 INFO L93 Difference]: Finished difference Result 31564 states and 53193 transitions. [2021-02-19 18:20:30,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:20:30,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 365 [2021-02-19 18:20:30,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:30,198 INFO L225 Difference]: With dead ends: 31564 [2021-02-19 18:20:30,198 INFO L226 Difference]: Without dead ends: 21006 [2021-02-19 18:20:30,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:20:30,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21006 states. [2021-02-19 18:20:30,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21006 to 21002. [2021-02-19 18:20:30,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21002 states. [2021-02-19 18:20:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21002 states to 21002 states and 35288 transitions. [2021-02-19 18:20:30,906 INFO L78 Accepts]: Start accepts. Automaton has 21002 states and 35288 transitions. Word has length 365 [2021-02-19 18:20:30,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:20:30,906 INFO L480 AbstractCegarLoop]: Abstraction has 21002 states and 35288 transitions. [2021-02-19 18:20:30,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:20:30,907 INFO L276 IsEmpty]: Start isEmpty. Operand 21002 states and 35288 transitions. [2021-02-19 18:20:30,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2021-02-19 18:20:30,950 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:20:30,951 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] [2021-02-19 18:20:30,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-19 18:20:30,951 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:20:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:20:30,952 INFO L82 PathProgramCache]: Analyzing trace with hash 744427582, now seen corresponding path program 1 times [2021-02-19 18:20:30,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:20:30,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451605026] [2021-02-19 18:20:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:20:31,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:31,176 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:31,176 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:31,178 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:31,178 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:20:31,184 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:31,184 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:32,488 WARN L202 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:20:32,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:20:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:20:32,510 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:20:32,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:20:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:20:32,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451605026] [2021-02-19 18:20:32,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:20:32,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:20:32,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309878785] [2021-02-19 18:20:32,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:20:32,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:20:32,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:20:32,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:20:32,639 INFO L87 Difference]: Start difference. First operand 21002 states and 35288 transitions. Second operand 4 states. [2021-02-19 18:20:33,931 WARN L202 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 428 [2021-02-19 18:20:59,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:20:59,248 INFO L93 Difference]: Finished difference Result 38803 states and 65367 transitions. [2021-02-19 18:20:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:20:59,250 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 369 [2021-02-19 18:20:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:20:59,293 INFO L225 Difference]: With dead ends: 38803 [2021-02-19 18:20:59,293 INFO L226 Difference]: Without dead ends: 28235 [2021-02-19 18:20:59,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:20:59,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28235 states. [2021-02-19 18:21:00,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28235 to 28231. [2021-02-19 18:21:00,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28231 states. [2021-02-19 18:21:00,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28231 states to 28231 states and 47446 transitions. [2021-02-19 18:21:00,384 INFO L78 Accepts]: Start accepts. Automaton has 28231 states and 47446 transitions. Word has length 369 [2021-02-19 18:21:00,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:00,385 INFO L480 AbstractCegarLoop]: Abstraction has 28231 states and 47446 transitions. [2021-02-19 18:21:00,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:21:00,385 INFO L276 IsEmpty]: Start isEmpty. Operand 28231 states and 47446 transitions. [2021-02-19 18:21:00,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-02-19 18:21:00,427 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:21:00,428 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] [2021-02-19 18:21:00,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-19 18:21:00,428 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:21:00,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:00,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1936796331, now seen corresponding path program 1 times [2021-02-19 18:21:00,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:00,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106965527] [2021-02-19 18:21:00,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:00,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:00,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:00,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:00,623 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:00,623 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:21:00,628 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:00,628 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:01,828 WARN L202 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:21:01,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:21:01,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:01,861 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:01,862 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:01,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:01,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106965527] [2021-02-19 18:21:01,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:21:01,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:21:02,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968542770] [2021-02-19 18:21:02,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:21:02,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:02,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:21:02,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:21:02,001 INFO L87 Difference]: Start difference. First operand 28231 states and 47446 transitions. Second operand 4 states. [2021-02-19 18:21:03,364 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 426 [2021-02-19 18:21:31,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:21:31,114 INFO L93 Difference]: Finished difference Result 81223 states and 135938 transitions. [2021-02-19 18:21:31,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:21:31,115 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 373 [2021-02-19 18:21:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:21:31,220 INFO L225 Difference]: With dead ends: 81223 [2021-02-19 18:21:31,220 INFO L226 Difference]: Without dead ends: 53643 [2021-02-19 18:21:31,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:21:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53643 states. [2021-02-19 18:21:32,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53643 to 53639. [2021-02-19 18:21:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53639 states. [2021-02-19 18:21:32,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53639 states to 53639 states and 89423 transitions. [2021-02-19 18:21:32,994 INFO L78 Accepts]: Start accepts. Automaton has 53639 states and 89423 transitions. Word has length 373 [2021-02-19 18:21:32,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:21:32,994 INFO L480 AbstractCegarLoop]: Abstraction has 53639 states and 89423 transitions. [2021-02-19 18:21:32,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:21:32,994 INFO L276 IsEmpty]: Start isEmpty. Operand 53639 states and 89423 transitions. [2021-02-19 18:21:33,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2021-02-19 18:21:33,343 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:21:33,344 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] [2021-02-19 18:21:33,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-19 18:21:33,344 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:21:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:21:33,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1101836431, now seen corresponding path program 1 times [2021-02-19 18:21:33,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:21:33,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645218690] [2021-02-19 18:21:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:21:33,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:33,563 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:33,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:33,565 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:33,565 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:21:33,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:33,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:34,963 WARN L202 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:21:34,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:21:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:21:34,993 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:21:34,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:21:35,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:21:35,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645218690] [2021-02-19 18:21:35,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:21:35,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:21:35,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446558227] [2021-02-19 18:21:35,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:21:35,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:21:35,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:21:35,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:21:35,154 INFO L87 Difference]: Start difference. First operand 53639 states and 89423 transitions. Second operand 4 states. [2021-02-19 18:21:36,433 WARN L202 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 428 [2021-02-19 18:22:02,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:02,693 INFO L93 Difference]: Finished difference Result 100010 states and 167236 transitions. [2021-02-19 18:22:02,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:22:02,694 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 377 [2021-02-19 18:22:02,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:02,799 INFO L225 Difference]: With dead ends: 100010 [2021-02-19 18:22:02,799 INFO L226 Difference]: Without dead ends: 72420 [2021-02-19 18:22:02,844 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 [2021-02-19 18:22:02,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72420 states. [2021-02-19 18:22:05,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72420 to 72416. [2021-02-19 18:22:05,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72416 states. [2021-02-19 18:22:05,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72416 states to 72416 states and 120709 transitions. [2021-02-19 18:22:05,728 INFO L78 Accepts]: Start accepts. Automaton has 72416 states and 120709 transitions. Word has length 377 [2021-02-19 18:22:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:05,729 INFO L480 AbstractCegarLoop]: Abstraction has 72416 states and 120709 transitions. [2021-02-19 18:22:05,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:22:05,729 INFO L276 IsEmpty]: Start isEmpty. Operand 72416 states and 120709 transitions. [2021-02-19 18:22:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2021-02-19 18:22:05,796 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:22:05,796 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] [2021-02-19 18:22:05,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-19 18:22:05,796 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:22:05,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:05,797 INFO L82 PathProgramCache]: Analyzing trace with hash -408938844, now seen corresponding path program 1 times [2021-02-19 18:22:05,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:05,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975251865] [2021-02-19 18:22:05,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:05,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:05,995 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:05,996 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:06,004 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:06,008 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:22:06,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:06,016 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:07,582 WARN L202 SmtUtils]: Spent 1.54 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:22:07,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:22:07,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:07,606 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:07,607 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:07,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:07,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975251865] [2021-02-19 18:22:07,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:22:07,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:22:07,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310270643] [2021-02-19 18:22:07,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:22:07,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:07,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:22:07,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:22:07,793 INFO L87 Difference]: Start difference. First operand 72416 states and 120709 transitions. Second operand 4 states. [2021-02-19 18:22:09,115 WARN L202 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 426 [2021-02-19 18:22:40,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:22:40,597 INFO L93 Difference]: Finished difference Result 209486 states and 347551 transitions. [2021-02-19 18:22:40,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:22:40,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 381 [2021-02-19 18:22:40,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:22:40,768 INFO L225 Difference]: With dead ends: 209486 [2021-02-19 18:22:40,769 INFO L226 Difference]: Without dead ends: 137744 [2021-02-19 18:22:40,989 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 [2021-02-19 18:22:41,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137744 states. [2021-02-19 18:22:45,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137744 to 137740. [2021-02-19 18:22:45,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137740 states. [2021-02-19 18:22:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137740 states to 137740 states and 227422 transitions. [2021-02-19 18:22:45,523 INFO L78 Accepts]: Start accepts. Automaton has 137740 states and 227422 transitions. Word has length 381 [2021-02-19 18:22:45,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:22:45,528 INFO L480 AbstractCegarLoop]: Abstraction has 137740 states and 227422 transitions. [2021-02-19 18:22:45,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:22:45,528 INFO L276 IsEmpty]: Start isEmpty. Operand 137740 states and 227422 transitions. [2021-02-19 18:22:45,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-02-19 18:22:45,872 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:22:45,873 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] [2021-02-19 18:22:45,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 18:22:45,873 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:22:45,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:22:45,874 INFO L82 PathProgramCache]: Analyzing trace with hash 921712118, now seen corresponding path program 1 times [2021-02-19 18:22:45,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:22:45,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663696182] [2021-02-19 18:22:45,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:22:45,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:46,098 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:46,099 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:46,100 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:46,100 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-19 18:22:46,106 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:46,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:47,384 WARN L202 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:22:47,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:22:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:22:47,408 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:22:47,409 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:22:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:22:47,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663696182] [2021-02-19 18:22:47,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:22:47,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:22:47,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380201414] [2021-02-19 18:22:47,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 18:22:47,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:22:47,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 18:22:47,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 18:22:47,653 INFO L87 Difference]: Start difference. First operand 137740 states and 227422 transitions. Second operand 4 states. [2021-02-19 18:22:48,978 WARN L202 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 428 [2021-02-19 18:23:19,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:23:19,222 INFO L93 Difference]: Finished difference Result 256489 states and 424821 transitions. [2021-02-19 18:23:19,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:23:19,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 385 [2021-02-19 18:23:19,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:23:19,451 INFO L225 Difference]: With dead ends: 256489 [2021-02-19 18:23:19,451 INFO L226 Difference]: Without dead ends: 184737 [2021-02-19 18:23:19,712 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:23:19,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184737 states. [2021-02-19 18:23:25,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184737 to 184733. [2021-02-19 18:23:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184733 states. [2021-02-19 18:23:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184733 states to 184733 states and 304688 transitions. [2021-02-19 18:23:25,655 INFO L78 Accepts]: Start accepts. Automaton has 184733 states and 304688 transitions. Word has length 385 [2021-02-19 18:23:25,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:23:25,656 INFO L480 AbstractCegarLoop]: Abstraction has 184733 states and 304688 transitions. [2021-02-19 18:23:25,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-19 18:23:25,656 INFO L276 IsEmpty]: Start isEmpty. Operand 184733 states and 304688 transitions. [2021-02-19 18:23:26,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-02-19 18:23:26,055 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:23:26,055 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] [2021-02-19 18:23:26,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-19 18:23:26,056 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:23:26,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:23:26,056 INFO L82 PathProgramCache]: Analyzing trace with hash -418029789, now seen corresponding path program 1 times [2021-02-19 18:23:26,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:23:26,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306325904] [2021-02-19 18:23:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:23:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:26,363 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:26,369 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:26,373 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:26,374 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 8 [2021-02-19 18:23:26,384 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:26,388 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:23:26,398 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:26,399 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-19 18:23:26,412 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:26,413 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-19 18:23:26,428 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:26,429 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-02-19 18:23:26,446 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:26,447 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-02-19 18:23:26,449 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:26,450 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:27,970 WARN L202 SmtUtils]: Spent 1.48 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:23:27,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:23:27,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:23:28,000 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:23:28,000 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:23:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:23:28,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306325904] [2021-02-19 18:23:28,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:23:28,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-02-19 18:23:28,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36311853] [2021-02-19 18:23:28,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:23:28,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:23:28,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:23:28,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:23:28,284 INFO L87 Difference]: Start difference. First operand 184733 states and 304688 transitions. Second operand 8 states. [2021-02-19 18:23:29,762 WARN L202 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 432 [2021-02-19 18:24:52,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:52,517 INFO L93 Difference]: Finished difference Result 1193777 states and 1977333 transitions. [2021-02-19 18:24:52,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 18:24:52,518 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 389 [2021-02-19 18:24:52,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:54,654 INFO L225 Difference]: With dead ends: 1193777 [2021-02-19 18:24:54,655 INFO L226 Difference]: Without dead ends: 1009721 [2021-02-19 18:24:55,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-02-19 18:24:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1009721 states. [2021-02-19 18:25:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1009721 to 520028. [2021-02-19 18:25:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 520028 states. [2021-02-19 18:25:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520028 states to 520028 states and 856980 transitions. [2021-02-19 18:25:33,139 INFO L78 Accepts]: Start accepts. Automaton has 520028 states and 856980 transitions. Word has length 389 [2021-02-19 18:25:33,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:33,139 INFO L480 AbstractCegarLoop]: Abstraction has 520028 states and 856980 transitions. [2021-02-19 18:25:33,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-02-19 18:25:33,139 INFO L276 IsEmpty]: Start isEmpty. Operand 520028 states and 856980 transitions. [2021-02-19 18:25:34,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2021-02-19 18:25:34,487 INFO L414 BasicCegarLoop]: Found error trace [2021-02-19 18:25:34,487 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] [2021-02-19 18:25:34,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-19 18:25:34,488 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION, mainErr1ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-19 18:25:34,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:34,489 INFO L82 PathProgramCache]: Analyzing trace with hash 537442565, now seen corresponding path program 1 times [2021-02-19 18:25:34,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:34,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428069611] [2021-02-19 18:25:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:34,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:34,935 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:34,936 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:34,940 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:34,941 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-19 18:25:34,946 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:34,949 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-19 18:25:34,960 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:34,961 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:36,460 WARN L202 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 424 [2021-02-19 18:25:36,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-19 18:25:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:36,478 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:36,479 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-19 18:25:36,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:36,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428069611] [2021-02-19 18:25:36,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:25:36,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-19 18:25:36,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016209227] [2021-02-19 18:25:36,633 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:25:36,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:36,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:25:36,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:25:36,634 INFO L87 Difference]: Start difference. First operand 520028 states and 856980 transitions. Second operand 5 states. [2021-02-19 18:25:38,044 WARN L202 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 427