/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_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 19:05:10,326 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 19:05:10,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 19:05:10,391 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 19:05:10,392 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 19:05:10,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 19:05:10,401 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 19:05:10,409 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 19:05:10,413 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 19:05:10,419 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 19:05:10,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 19:05:10,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 19:05:10,423 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 19:05:10,427 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 19:05:10,429 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 19:05:10,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 19:05:10,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 19:05:10,437 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 19:05:10,445 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 19:05:10,453 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 19:05:10,455 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 19:05:10,457 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 19:05:10,458 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 19:05:10,461 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 19:05:10,470 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 19:05:10,482 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 19:05:10,483 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 19:05:10,484 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 19:05:10,485 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 [2020-10-23 19:05:10,562 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 19:05:10,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 19:05:10,564 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 19:05:10,564 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 19:05:10,565 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 19:05:10,565 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 19:05:10,565 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 19:05:10,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 19:05:10,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 19:05:10,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 19:05:10,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 19:05:10,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 19:05:10,566 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 19:05:10,567 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 19:05:10,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 19:05:10,567 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 19:05:10,567 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 19:05:10,567 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 19:05:10,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 19:05:10,568 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 19:05:10,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 19:05:10,568 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:05:10,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 19:05:10,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 19:05:10,569 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 19:05:10,569 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 19:05:10,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 19:05:10,570 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 19:05:10,570 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 19:05:10,570 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 19:05:10,971 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 19:05:11,011 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 19:05:11,016 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 19:05:11,017 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 19:05:11,018 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 19:05:11,019 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-23 19:05:11,099 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a7f02917/4e3bdb3216934d0ebaf3872c45a6fc0c/FLAGe63dcc31e [2020-10-23 19:05:11,942 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 19:05:11,942 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-23 19:05:11,984 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a7f02917/4e3bdb3216934d0ebaf3872c45a6fc0c/FLAGe63dcc31e [2020-10-23 19:05:12,042 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0a7f02917/4e3bdb3216934d0ebaf3872c45a6fc0c [2020-10-23 19:05:12,050 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 19:05:12,058 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 19:05:12,062 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 19:05:12,062 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 19:05:12,066 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 19:05:12,067 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:05:12" (1/1) ... [2020-10-23 19:05:12,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3865d9d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:12, skipping insertion in model container [2020-10-23 19:05:12,072 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:05:12" (1/1) ... [2020-10-23 19:05:12,081 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 19:05:12,272 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:05:13,970 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:05:13,990 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:05:14,967 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:05:14,994 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:05:14,995 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:14 WrapperNode [2020-10-23 19:05:14,995 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:05:14,996 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:05:14,996 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:05:14,996 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:05:15,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:14" (1/1) ... [2020-10-23 19:05:15,012 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:14" (1/1) ... [2020-10-23 19:05:15,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:14" (1/1) ... [2020-10-23 19:05:15,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:14" (1/1) ... [2020-10-23 19:05:15,145 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:14" (1/1) ... [2020-10-23 19:05:15,201 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:14" (1/1) ... [2020-10-23 19:05:15,228 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:14" (1/1) ... [2020-10-23 19:05:15,257 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:05:15,259 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:05:15,259 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:05:15,259 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:05:15,260 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:14" (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 [2020-10-23 19:05:15,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:05:15,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:05:15,351 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:05:15,352 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:05:15,352 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:05:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:05:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:05:15,353 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:05:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:05:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:05:15,354 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:05:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:05:15,355 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:05:15,356 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:05:15,356 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:05:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:05:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:05:15,357 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:05:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:05:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-23 19:05:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:05:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:05:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:05:15,358 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:05:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:05:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:05:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:05:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:05:15,359 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:05:20,071 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:05:20,072 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:05:20,077 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:05:20 BoogieIcfgContainer [2020-10-23 19:05:20,077 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:05:20,081 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:05:20,081 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:05:20,085 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:05:20,086 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:05:12" (1/3) ... [2020-10-23 19:05:20,087 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642d6480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:05:20, skipping insertion in model container [2020-10-23 19:05:20,087 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:05:14" (2/3) ... [2020-10-23 19:05:20,088 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@642d6480 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:05:20, skipping insertion in model container [2020-10-23 19:05:20,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:05:20" (3/3) ... [2020-10-23 19:05:20,089 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-10-23 19:05:20,103 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:05:20,111 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:05:20,127 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:05:20,186 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:05:20,186 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:05:20,187 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:05:20,187 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:05:20,187 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:05:20,187 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:05:20,187 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:05:20,187 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:05:20,246 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states. [2020-10-23 19:05:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-10-23 19:05:20,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:20,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:05:20,303 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:20,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:20,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1619916153, now seen corresponding path program 1 times [2020-10-23 19:05:20,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:20,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467670615] [2020-10-23 19:05:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:22,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:24,440 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:05:24,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:25,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:05:25,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467670615] [2020-10-23 19:05:25,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:25,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:05:25,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488247569] [2020-10-23 19:05:25,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:05:25,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:25,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:05:25,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:05:25,303 INFO L87 Difference]: Start difference. First operand 1488 states. Second operand 5 states. [2020-10-23 19:05:42,533 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-23 19:05:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:05:46,098 INFO L93 Difference]: Finished difference Result 4398 states and 7945 transitions. [2020-10-23 19:05:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-23 19:05:46,101 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2020-10-23 19:05:46,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:05:46,170 INFO L225 Difference]: With dead ends: 4398 [2020-10-23 19:05:46,171 INFO L226 Difference]: Without dead ends: 2919 [2020-10-23 19:05:46,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:05:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2020-10-23 19:05:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2865. [2020-10-23 19:05:46,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-10-23 19:05:46,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4722 transitions. [2020-10-23 19:05:46,490 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4722 transitions. Word has length 485 [2020-10-23 19:05:46,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:05:46,496 INFO L481 AbstractCegarLoop]: Abstraction has 2865 states and 4722 transitions. [2020-10-23 19:05:46,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:05:46,496 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4722 transitions. [2020-10-23 19:05:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-10-23 19:05:46,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:05:46,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:05:46,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:05:46,515 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:05:46,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:05:46,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1798631469, now seen corresponding path program 1 times [2020-10-23 19:05:46,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:05:46,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844008141] [2020-10-23 19:05:46,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:05:46,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:48,354 WARN L193 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:05:48,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:05:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:05:48,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:05:48,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844008141] [2020-10-23 19:05:48,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:05:48,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:05:48,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184957704] [2020-10-23 19:05:48,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:05:48,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:05:48,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:05:48,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:05:48,836 INFO L87 Difference]: Start difference. First operand 2865 states and 4722 transitions. Second operand 4 states. [2020-10-23 19:06:09,616 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:06:12,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:12,944 INFO L93 Difference]: Finished difference Result 8316 states and 13669 transitions. [2020-10-23 19:06:12,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:06:12,945 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-10-23 19:06:12,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:12,980 INFO L225 Difference]: With dead ends: 8316 [2020-10-23 19:06:12,980 INFO L226 Difference]: Without dead ends: 5665 [2020-10-23 19:06:12,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:06:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2020-10-23 19:06:13,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5613. [2020-10-23 19:06:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5613 states. [2020-10-23 19:06:13,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5613 states to 5613 states and 9226 transitions. [2020-10-23 19:06:13,271 INFO L78 Accepts]: Start accepts. Automaton has 5613 states and 9226 transitions. Word has length 487 [2020-10-23 19:06:13,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:13,273 INFO L481 AbstractCegarLoop]: Abstraction has 5613 states and 9226 transitions. [2020-10-23 19:06:13,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:06:13,274 INFO L276 IsEmpty]: Start isEmpty. Operand 5613 states and 9226 transitions. [2020-10-23 19:06:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-10-23 19:06:13,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:13,302 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:06:13,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:06:13,304 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:13,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:13,311 INFO L82 PathProgramCache]: Analyzing trace with hash 408851211, now seen corresponding path program 1 times [2020-10-23 19:06:13,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:13,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308281884] [2020-10-23 19:06:13,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:13,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:14,779 WARN L193 SmtUtils]: Spent 1.23 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:06:14,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:15,034 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:06:15,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308281884] [2020-10-23 19:06:15,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:15,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:06:15,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383061884] [2020-10-23 19:06:15,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:06:15,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:15,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:06:15,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:15,040 INFO L87 Difference]: Start difference. First operand 5613 states and 9226 transitions. Second operand 4 states. [2020-10-23 19:06:37,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:06:37,125 INFO L93 Difference]: Finished difference Result 16740 states and 27509 transitions. [2020-10-23 19:06:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:06:37,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-10-23 19:06:37,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:06:37,187 INFO L225 Difference]: With dead ends: 16740 [2020-10-23 19:06:37,187 INFO L226 Difference]: Without dead ends: 11179 [2020-10-23 19:06:37,201 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:37,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2020-10-23 19:06:37,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 5660. [2020-10-23 19:06:37,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5660 states. [2020-10-23 19:06:37,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5660 states to 5660 states and 9300 transitions. [2020-10-23 19:06:37,529 INFO L78 Accepts]: Start accepts. Automaton has 5660 states and 9300 transitions. Word has length 488 [2020-10-23 19:06:37,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:06:37,529 INFO L481 AbstractCegarLoop]: Abstraction has 5660 states and 9300 transitions. [2020-10-23 19:06:37,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:06:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states and 9300 transitions. [2020-10-23 19:06:37,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-10-23 19:06:37,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:06:37,555 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:06:37,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:06:37,556 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:06:37,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:06:37,557 INFO L82 PathProgramCache]: Analyzing trace with hash -435715758, now seen corresponding path program 1 times [2020-10-23 19:06:37,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:06:37,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977381334] [2020-10-23 19:06:37,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:06:37,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:39,219 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:06:39,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:06:39,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:06:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:06:39,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977381334] [2020-10-23 19:06:39,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:06:39,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:06:39,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105522182] [2020-10-23 19:06:39,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:06:39,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:06:39,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:06:39,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:06:39,592 INFO L87 Difference]: Start difference. First operand 5660 states and 9300 transitions. Second operand 4 states. [2020-10-23 19:07:00,070 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:07:03,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:03,467 INFO L93 Difference]: Finished difference Result 16304 states and 26697 transitions. [2020-10-23 19:07:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:07:03,469 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-10-23 19:07:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:03,516 INFO L225 Difference]: With dead ends: 16304 [2020-10-23 19:07:03,516 INFO L226 Difference]: Without dead ends: 11043 [2020-10-23 19:07:03,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:07:03,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2020-10-23 19:07:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10993. [2020-10-23 19:07:04,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10993 states. [2020-10-23 19:07:04,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10993 states to 10993 states and 17978 transitions. [2020-10-23 19:07:04,069 INFO L78 Accepts]: Start accepts. Automaton has 10993 states and 17978 transitions. Word has length 489 [2020-10-23 19:07:04,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:04,070 INFO L481 AbstractCegarLoop]: Abstraction has 10993 states and 17978 transitions. [2020-10-23 19:07:04,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:07:04,070 INFO L276 IsEmpty]: Start isEmpty. Operand 10993 states and 17978 transitions. [2020-10-23 19:07:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-10-23 19:07:04,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:04,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:04,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:07:04,098 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:04,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:04,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1204106643, now seen corresponding path program 1 times [2020-10-23 19:07:04,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:04,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5013469] [2020-10-23 19:07:04,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:04,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:05,652 WARN L193 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:07:05,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:05,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:07:05,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5013469] [2020-10-23 19:07:05,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:05,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:05,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206819142] [2020-10-23 19:07:05,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:05,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:05,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:05,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:05,955 INFO L87 Difference]: Start difference. First operand 10993 states and 17978 transitions. Second operand 4 states. [2020-10-23 19:07:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:29,449 INFO L93 Difference]: Finished difference Result 32721 states and 53488 transitions. [2020-10-23 19:07:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:07:29,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-10-23 19:07:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:29,504 INFO L225 Difference]: With dead ends: 32721 [2020-10-23 19:07:29,504 INFO L226 Difference]: Without dead ends: 21872 [2020-10-23 19:07:29,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:29,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21872 states. [2020-10-23 19:07:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21872 to 11091. [2020-10-23 19:07:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11091 states. [2020-10-23 19:07:30,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11091 states to 11091 states and 18129 transitions. [2020-10-23 19:07:30,199 INFO L78 Accepts]: Start accepts. Automaton has 11091 states and 18129 transitions. Word has length 489 [2020-10-23 19:07:30,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:30,199 INFO L481 AbstractCegarLoop]: Abstraction has 11091 states and 18129 transitions. [2020-10-23 19:07:30,199 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:07:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 11091 states and 18129 transitions. [2020-10-23 19:07:30,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-10-23 19:07:30,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:30,227 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:30,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:07:30,229 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:30,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:30,234 INFO L82 PathProgramCache]: Analyzing trace with hash -182668678, now seen corresponding path program 1 times [2020-10-23 19:07:30,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:30,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400390119] [2020-10-23 19:07:30,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:31,771 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:07:31,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:07:32,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400390119] [2020-10-23 19:07:32,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:32,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:32,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624244533] [2020-10-23 19:07:32,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:32,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:32,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:32,035 INFO L87 Difference]: Start difference. First operand 11091 states and 18129 transitions. Second operand 4 states. [2020-10-23 19:07:56,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:07:56,253 INFO L93 Difference]: Finished difference Result 32856 states and 53669 transitions. [2020-10-23 19:07:56,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:07:56,254 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-10-23 19:07:56,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:07:56,301 INFO L225 Difference]: With dead ends: 32856 [2020-10-23 19:07:56,302 INFO L226 Difference]: Without dead ends: 21989 [2020-10-23 19:07:56,326 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:56,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21989 states. [2020-10-23 19:07:57,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21989 to 11208. [2020-10-23 19:07:57,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11208 states. [2020-10-23 19:07:57,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11208 states to 11208 states and 18275 transitions. [2020-10-23 19:07:57,038 INFO L78 Accepts]: Start accepts. Automaton has 11208 states and 18275 transitions. Word has length 490 [2020-10-23 19:07:57,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:07:57,039 INFO L481 AbstractCegarLoop]: Abstraction has 11208 states and 18275 transitions. [2020-10-23 19:07:57,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:07:57,039 INFO L276 IsEmpty]: Start isEmpty. Operand 11208 states and 18275 transitions. [2020-10-23 19:07:57,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-10-23 19:07:57,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:07:57,075 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:07:57,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:07:57,075 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:07:57,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:07:57,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1121081195, now seen corresponding path program 1 times [2020-10-23 19:07:57,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:07:57,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641173048] [2020-10-23 19:07:57,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:07:57,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:58,721 WARN L193 SmtUtils]: Spent 1.37 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:07:58,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:07:58,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:07:58,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:07:58,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641173048] [2020-10-23 19:07:58,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:07:58,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:07:58,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562127009] [2020-10-23 19:07:58,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:07:58,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:07:58,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:07:58,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:07:58,981 INFO L87 Difference]: Start difference. First operand 11208 states and 18275 transitions. Second operand 4 states. [2020-10-23 19:08:16,226 WARN L193 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:08:16,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:08:16,485 INFO L93 Difference]: Finished difference Result 21558 states and 34735 transitions. [2020-10-23 19:08:16,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:08:16,486 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-10-23 19:08:16,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:08:16,517 INFO L225 Difference]: With dead ends: 21558 [2020-10-23 19:08:16,517 INFO L226 Difference]: Without dead ends: 14875 [2020-10-23 19:08:16,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:08:16,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14875 states. [2020-10-23 19:08:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14875 to 12752. [2020-10-23 19:08:17,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12752 states. [2020-10-23 19:08:17,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12752 states to 12752 states and 20835 transitions. [2020-10-23 19:08:17,357 INFO L78 Accepts]: Start accepts. Automaton has 12752 states and 20835 transitions. Word has length 491 [2020-10-23 19:08:17,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:08:17,357 INFO L481 AbstractCegarLoop]: Abstraction has 12752 states and 20835 transitions. [2020-10-23 19:08:17,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:08:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states and 20835 transitions. [2020-10-23 19:08:17,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-10-23 19:08:17,383 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:08:17,383 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:08:17,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:08:17,384 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:08:17,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:08:17,385 INFO L82 PathProgramCache]: Analyzing trace with hash -462641577, now seen corresponding path program 1 times [2020-10-23 19:08:17,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:08:17,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557393116] [2020-10-23 19:08:17,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:08:17,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:18,949 WARN L193 SmtUtils]: Spent 1.28 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:08:18,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:08:18,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:19,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:08:19,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557393116] [2020-10-23 19:08:19,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:08:19,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:08:19,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116133722] [2020-10-23 19:08:19,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:08:19,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:08:19,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:08:19,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:08:19,365 INFO L87 Difference]: Start difference. First operand 12752 states and 20835 transitions. Second operand 4 states. [2020-10-23 19:08:41,764 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:08:45,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:08:45,722 INFO L93 Difference]: Finished difference Result 36492 states and 59506 transitions. [2020-10-23 19:08:45,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:08:45,723 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-10-23 19:08:45,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:08:45,767 INFO L225 Difference]: With dead ends: 36492 [2020-10-23 19:08:45,768 INFO L226 Difference]: Without dead ends: 24709 [2020-10-23 19:08:45,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:08:45,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24709 states. [2020-10-23 19:08:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24709 to 24661. [2020-10-23 19:08:47,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24661 states. [2020-10-23 19:08:47,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 40124 transitions. [2020-10-23 19:08:47,127 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 40124 transitions. Word has length 491 [2020-10-23 19:08:47,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:08:47,128 INFO L481 AbstractCegarLoop]: Abstraction has 24661 states and 40124 transitions. [2020-10-23 19:08:47,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:08:47,128 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 40124 transitions. [2020-10-23 19:08:47,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-10-23 19:08:47,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:08:47,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:08:47,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:08:47,166 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:08:47,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:08:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1905383194, now seen corresponding path program 1 times [2020-10-23 19:08:47,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:08:47,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521734273] [2020-10-23 19:08:47,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:08:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:49,774 WARN L193 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:08:49,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:08:49,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:08:50,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:08:50,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521734273] [2020-10-23 19:08:50,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:08:50,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:08:50,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929529016] [2020-10-23 19:08:50,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:08:50,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:08:50,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:08:50,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:08:50,124 INFO L87 Difference]: Start difference. First operand 24661 states and 40124 transitions. Second operand 5 states. [2020-10-23 19:09:08,475 WARN L193 SmtUtils]: Spent 1.49 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-23 19:09:13,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:09:13,124 INFO L93 Difference]: Finished difference Result 72406 states and 117822 transitions. [2020-10-23 19:09:13,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:09:13,126 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 491 [2020-10-23 19:09:13,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:09:13,204 INFO L225 Difference]: With dead ends: 72406 [2020-10-23 19:09:13,204 INFO L226 Difference]: Without dead ends: 47963 [2020-10-23 19:09:13,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:09:13,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47963 states. [2020-10-23 19:09:15,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47963 to 47920. [2020-10-23 19:09:15,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47920 states. [2020-10-23 19:09:15,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47920 states to 47920 states and 77642 transitions. [2020-10-23 19:09:15,812 INFO L78 Accepts]: Start accepts. Automaton has 47920 states and 77642 transitions. Word has length 491 [2020-10-23 19:09:15,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:09:15,813 INFO L481 AbstractCegarLoop]: Abstraction has 47920 states and 77642 transitions. [2020-10-23 19:09:15,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:09:15,813 INFO L276 IsEmpty]: Start isEmpty. Operand 47920 states and 77642 transitions. [2020-10-23 19:09:15,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-10-23 19:09:15,853 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:09:15,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:09:15,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:09:15,854 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:09:15,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:09:15,854 INFO L82 PathProgramCache]: Analyzing trace with hash 2044020272, now seen corresponding path program 1 times [2020-10-23 19:09:15,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:09:15,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364349904] [2020-10-23 19:09:15,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:09:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:17,494 WARN L193 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:09:17,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:09:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:18,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:09:18,273 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364349904] [2020-10-23 19:09:18,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:09:18,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:09:18,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048171698] [2020-10-23 19:09:18,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:09:18,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:09:18,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:09:18,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:09:18,276 INFO L87 Difference]: Start difference. First operand 47920 states and 77642 transitions. Second operand 4 states. [2020-10-23 19:09:44,737 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:09:49,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:09:49,883 INFO L93 Difference]: Finished difference Result 140769 states and 227903 transitions. [2020-10-23 19:09:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:09:49,885 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-10-23 19:09:49,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:09:49,994 INFO L225 Difference]: With dead ends: 140769 [2020-10-23 19:09:49,994 INFO L226 Difference]: Without dead ends: 94391 [2020-10-23 19:09:50,042 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 [2020-10-23 19:09:50,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94391 states. [2020-10-23 19:09:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94391 to 94352. [2020-10-23 19:09:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94352 states. [2020-10-23 19:09:54,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94352 states to 94352 states and 152302 transitions. [2020-10-23 19:09:54,905 INFO L78 Accepts]: Start accepts. Automaton has 94352 states and 152302 transitions. Word has length 493 [2020-10-23 19:09:54,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:09:54,905 INFO L481 AbstractCegarLoop]: Abstraction has 94352 states and 152302 transitions. [2020-10-23 19:09:54,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:09:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 94352 states and 152302 transitions. [2020-10-23 19:09:55,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-10-23 19:09:55,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:09:55,217 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:09:55,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:09:55,217 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:09:55,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:09:55,218 INFO L82 PathProgramCache]: Analyzing trace with hash 932982741, now seen corresponding path program 1 times [2020-10-23 19:09:55,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:09:55,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418833427] [2020-10-23 19:09:55,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:09:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:57,196 WARN L193 SmtUtils]: Spent 1.45 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:09:57,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:09:57,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:09:57,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:09:57,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418833427] [2020-10-23 19:09:57,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:09:57,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:09:57,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283426110] [2020-10-23 19:09:57,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:09:57,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:09:57,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:09:57,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:09:57,550 INFO L87 Difference]: Start difference. First operand 94352 states and 152302 transitions. Second operand 4 states. [2020-10-23 19:10:27,132 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:10:33,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:10:33,360 INFO L93 Difference]: Finished difference Result 275870 states and 444497 transitions. [2020-10-23 19:10:33,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:10:33,361 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-10-23 19:10:33,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:10:33,813 INFO L225 Difference]: With dead ends: 275870 [2020-10-23 19:10:33,813 INFO L226 Difference]: Without dead ends: 185226 [2020-10-23 19:10:33,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:10:34,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185226 states. [2020-10-23 19:10:43,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185226 to 185189. [2020-10-23 19:10:43,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185189 states. [2020-10-23 19:10:44,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185189 states to 185189 states and 297598 transitions. [2020-10-23 19:10:44,151 INFO L78 Accepts]: Start accepts. Automaton has 185189 states and 297598 transitions. Word has length 495 [2020-10-23 19:10:44,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:10:44,152 INFO L481 AbstractCegarLoop]: Abstraction has 185189 states and 297598 transitions. [2020-10-23 19:10:44,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:10:44,152 INFO L276 IsEmpty]: Start isEmpty. Operand 185189 states and 297598 transitions. [2020-10-23 19:10:44,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-10-23 19:10:44,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:10:44,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:10:44,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:10:44,576 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:10:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:10:44,577 INFO L82 PathProgramCache]: Analyzing trace with hash -825445032, now seen corresponding path program 1 times [2020-10-23 19:10:44,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:10:44,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917419705] [2020-10-23 19:10:44,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:10:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:10:46,931 WARN L193 SmtUtils]: Spent 1.47 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:10:46,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:10:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:10:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:10:47,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917419705] [2020-10-23 19:10:47,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:10:47,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:10:47,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532691189] [2020-10-23 19:10:47,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:10:47,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:10:47,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:10:47,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:10:47,356 INFO L87 Difference]: Start difference. First operand 185189 states and 297598 transitions. Second operand 5 states. [2020-10-23 19:11:19,124 WARN L193 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 442 [2020-10-23 19:11:28,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:11:28,456 INFO L93 Difference]: Finished difference Result 549946 states and 883880 transitions. [2020-10-23 19:11:28,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:11:28,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 495 [2020-10-23 19:11:28,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:11:29,351 INFO L225 Difference]: With dead ends: 549946 [2020-10-23 19:11:29,351 INFO L226 Difference]: Without dead ends: 365145 [2020-10-23 19:11:29,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:11:29,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365145 states. [2020-10-23 19:11:49,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365145 to 365113. [2020-10-23 19:11:49,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365113 states. [2020-10-23 19:11:50,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365113 states to 365113 states and 584283 transitions. [2020-10-23 19:11:50,811 INFO L78 Accepts]: Start accepts. Automaton has 365113 states and 584283 transitions. Word has length 495 [2020-10-23 19:11:50,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:11:50,811 INFO L481 AbstractCegarLoop]: Abstraction has 365113 states and 584283 transitions. [2020-10-23 19:11:50,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:11:50,811 INFO L276 IsEmpty]: Start isEmpty. Operand 365113 states and 584283 transitions. [2020-10-23 19:11:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-10-23 19:11:51,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:11:51,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:11:51,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-23 19:11:51,627 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:11:51,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:11:51,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1571862685, now seen corresponding path program 1 times [2020-10-23 19:11:51,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:11:51,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566326736] [2020-10-23 19:11:51,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:11:51,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:11:53,553 WARN L193 SmtUtils]: Spent 1.64 s on a formula simplification that was a NOOP. DAG size: 436 [2020-10-23 19:11:53,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:11:53,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:11:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:11:53,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566326736] [2020-10-23 19:11:53,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:11:53,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:11:53,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945868470] [2020-10-23 19:11:53,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:11:53,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:11:53,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:11:53,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:11:53,963 INFO L87 Difference]: Start difference. First operand 365113 states and 584283 transitions. Second operand 4 states. [2020-10-23 19:12:46,570 WARN L193 SmtUtils]: Spent 1.59 s on a formula simplification that was a NOOP. DAG size: 441 [2020-10-23 19:13:01,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:13:01,604 INFO L93 Difference]: Finished difference Result 1082705 states and 1731568 transitions. [2020-10-23 19:13:01,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:13:01,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-10-23 19:13:01,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:13:03,328 INFO L225 Difference]: With dead ends: 1082705 [2020-10-23 19:13:03,329 INFO L226 Difference]: Without dead ends: 721230 [2020-10-23 19:13:03,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:13:04,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721230 states. [2020-10-23 19:13:43,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721230 to 721204. [2020-10-23 19:13:43,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721204 states. [2020-10-23 19:13:46,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 721204 states to 721204 states and 1149303 transitions. [2020-10-23 19:13:46,716 INFO L78 Accepts]: Start accepts. Automaton has 721204 states and 1149303 transitions. Word has length 497 [2020-10-23 19:13:46,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:13:46,716 INFO L481 AbstractCegarLoop]: Abstraction has 721204 states and 1149303 transitions. [2020-10-23 19:13:46,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:13:46,716 INFO L276 IsEmpty]: Start isEmpty. Operand 721204 states and 1149303 transitions.