/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 0.2.0-7d8eed3 [2020-11-06 23:03:00,904 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:03:00,907 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:03:00,944 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:03:00,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:03:00,946 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:03:00,948 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:03:00,950 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:03:00,952 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:03:00,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:03:00,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:03:00,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:03:00,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:03:00,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:03:00,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:03:00,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:03:00,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:03:00,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:03:00,964 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:03:00,967 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:03:00,968 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:03:00,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:03:00,971 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:03:00,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:03:00,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 23:03:00,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:03:00,992 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:03:00,993 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:03:00,994 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 [2020-11-06 23:03:01,062 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:03:01,063 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:03:01,064 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:03:01,064 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:03:01,064 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:03:01,065 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:03:01,066 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:03:01,066 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:03:01,066 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:03:01,067 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:03:01,067 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:03:01,067 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:03:01,067 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:03:01,067 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:03:01,068 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:03:01,068 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:03:01,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:03:01,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:03:01,069 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:03:01,070 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:03:01,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:03:01,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:03:01,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:03:01,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:03:01,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:03:01,071 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:03:01,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:03:01,071 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:03:01,071 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:03:01,071 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:03:01,506 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:03:01,552 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:03:01,555 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:03:01,556 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:03:01,557 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:03:01,558 INFO L432 ainManager$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 [2020-11-06 23:03:01,641 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d7d73739/79c677bc8f4049fe92385dadf55f0e59/FLAG6450465ef [2020-11-06 23:03:02,562 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:03:02,563 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 [2020-11-06 23:03:02,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d7d73739/79c677bc8f4049fe92385dadf55f0e59/FLAG6450465ef [2020-11-06 23:03:02,700 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d7d73739/79c677bc8f4049fe92385dadf55f0e59 [2020-11-06 23:03:02,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:03:02,710 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:03:02,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:03:02,712 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:03:02,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:03:02,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:02" (1/1) ... [2020-11-06 23:03:02,722 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3126e20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:02, skipping insertion in model container [2020-11-06 23:03:02,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:03:02" (1/1) ... [2020-11-06 23:03:02,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:03:02,918 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:03:04,530 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:03:04,548 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:03:05,500 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:03:05,527 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:03:05,527 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:05 WrapperNode [2020-11-06 23:03:05,527 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:03:05,528 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:03:05,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:03:05,529 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:03:05,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:05" (1/1) ... [2020-11-06 23:03:05,545 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:05" (1/1) ... [2020-11-06 23:03:05,580 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:05" (1/1) ... [2020-11-06 23:03:05,580 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:05" (1/1) ... [2020-11-06 23:03:05,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:05" (1/1) ... [2020-11-06 23:03:05,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:05" (1/1) ... [2020-11-06 23:03:05,721 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:05" (1/1) ... [2020-11-06 23:03:05,738 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:03:05,739 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:03:05,739 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:03:05,739 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:03:05,740 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:05" (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 [2020-11-06 23:03:05,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:03:05,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:03:05,817 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:03:05,817 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:03:05,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:03:05,818 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:03:05,818 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:03:05,818 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:03:05,818 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:03:05,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:03:05,818 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:03:05,819 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:03:05,819 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:03:05,819 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:03:05,819 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:03:05,819 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:03:05,819 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:03:05,820 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:03:05,820 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:03:05,820 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-11-06 23:03:05,820 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:03:05,820 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:03:05,820 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:03:05,820 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:03:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:03:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:03:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:03:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:03:05,821 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:03:11,562 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:03:11,563 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:03:11,566 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:11 BoogieIcfgContainer [2020-11-06 23:03:11,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:03:11,568 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:03:11,568 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:03:11,572 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:03:11,572 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:03:02" (1/3) ... [2020-11-06 23:03:11,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e75bd3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:11, skipping insertion in model container [2020-11-06 23:03:11,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:03:05" (2/3) ... [2020-11-06 23:03:11,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e75bd3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:03:11, skipping insertion in model container [2020-11-06 23:03:11,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:03:11" (3/3) ... [2020-11-06 23:03:11,575 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.BOUNDED-10.pals.c.v+lhb-reducer.c [2020-11-06 23:03:11,590 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:03:11,601 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:03:11,614 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:03:11,652 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:03:11,652 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:03:11,652 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:03:11,652 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:03:11,652 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:03:11,653 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:03:11,653 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:03:11,653 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:03:11,699 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states. [2020-11-06 23:03:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 486 [2020-11-06 23:03:11,746 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:11,747 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] [2020-11-06 23:03:11,748 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:11,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:11,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1619916153, now seen corresponding path program 1 times [2020-11-06 23:03:11,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:11,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906480834] [2020-11-06 23:03:11,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:13,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:16,336 WARN L194 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:03:16,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:16,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:16,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:16,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906480834] [2020-11-06 23:03:16,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:16,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:16,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823030072] [2020-11-06 23:03:16,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:16,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:16,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:16,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:16,785 INFO L87 Difference]: Start difference. First operand 1488 states. Second operand 5 states. [2020-11-06 23:03:36,654 WARN L194 SmtUtils]: Spent 2.36 s on a formula simplification that was a NOOP. DAG size: 442 [2020-11-06 23:03:40,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:40,601 INFO L93 Difference]: Finished difference Result 4398 states and 7945 transitions. [2020-11-06 23:03:40,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-06 23:03:40,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 485 [2020-11-06 23:03:40,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:40,659 INFO L225 Difference]: With dead ends: 4398 [2020-11-06 23:03:40,659 INFO L226 Difference]: Without dead ends: 2919 [2020-11-06 23:03:40,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:40,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2919 states. [2020-11-06 23:03:40,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2919 to 2865. [2020-11-06 23:03:40,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2865 states. [2020-11-06 23:03:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2865 states to 2865 states and 4722 transitions. [2020-11-06 23:03:40,915 INFO L78 Accepts]: Start accepts. Automaton has 2865 states and 4722 transitions. Word has length 485 [2020-11-06 23:03:40,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:40,922 INFO L481 AbstractCegarLoop]: Abstraction has 2865 states and 4722 transitions. [2020-11-06 23:03:40,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:40,922 INFO L276 IsEmpty]: Start isEmpty. Operand 2865 states and 4722 transitions. [2020-11-06 23:03:40,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2020-11-06 23:03:40,942 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:40,943 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] [2020-11-06 23:03:40,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:03:40,944 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:40,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1798631469, now seen corresponding path program 1 times [2020-11-06 23:03:40,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:40,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435552195] [2020-11-06 23:03:40,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:43,869 WARN L194 SmtUtils]: Spent 2.27 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:03:43,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:43,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:44,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:03:44,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435552195] [2020-11-06 23:03:44,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:44,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:44,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745725267] [2020-11-06 23:03:44,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:44,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:44,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:44,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:44,266 INFO L87 Difference]: Start difference. First operand 2865 states and 4722 transitions. Second operand 4 states. [2020-11-06 23:04:07,756 WARN L194 SmtUtils]: Spent 2.34 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:04:11,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:11,501 INFO L93 Difference]: Finished difference Result 8316 states and 13669 transitions. [2020-11-06 23:04:11,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:11,505 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 487 [2020-11-06 23:04:11,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:11,539 INFO L225 Difference]: With dead ends: 8316 [2020-11-06 23:04:11,539 INFO L226 Difference]: Without dead ends: 5665 [2020-11-06 23:04:11,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:11,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5665 states. [2020-11-06 23:04:11,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5665 to 5613. [2020-11-06 23:04:11,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5613 states. [2020-11-06 23:04:11,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5613 states to 5613 states and 9226 transitions. [2020-11-06 23:04:11,805 INFO L78 Accepts]: Start accepts. Automaton has 5613 states and 9226 transitions. Word has length 487 [2020-11-06 23:04:11,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:11,807 INFO L481 AbstractCegarLoop]: Abstraction has 5613 states and 9226 transitions. [2020-11-06 23:04:11,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 5613 states and 9226 transitions. [2020-11-06 23:04:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2020-11-06 23:04:11,830 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:11,834 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] [2020-11-06 23:04:11,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:04:11,834 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:11,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:11,842 INFO L82 PathProgramCache]: Analyzing trace with hash 408851211, now seen corresponding path program 1 times [2020-11-06 23:04:11,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:11,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019513293] [2020-11-06 23:04:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:11,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:14,307 WARN L194 SmtUtils]: Spent 2.23 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:04:14,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:14,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:14,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:14,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019513293] [2020-11-06 23:04:14,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:14,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:14,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669661239] [2020-11-06 23:04:14,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:14,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:14,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:14,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:14,538 INFO L87 Difference]: Start difference. First operand 5613 states and 9226 transitions. Second operand 4 states. [2020-11-06 23:04:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:39,786 INFO L93 Difference]: Finished difference Result 16740 states and 27509 transitions. [2020-11-06 23:04:39,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:04:39,787 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 488 [2020-11-06 23:04:39,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:39,838 INFO L225 Difference]: With dead ends: 16740 [2020-11-06 23:04:39,838 INFO L226 Difference]: Without dead ends: 11179 [2020-11-06 23:04:39,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:39,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2020-11-06 23:04:40,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 5660. [2020-11-06 23:04:40,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5660 states. [2020-11-06 23:04:40,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5660 states to 5660 states and 9300 transitions. [2020-11-06 23:04:40,166 INFO L78 Accepts]: Start accepts. Automaton has 5660 states and 9300 transitions. Word has length 488 [2020-11-06 23:04:40,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:40,166 INFO L481 AbstractCegarLoop]: Abstraction has 5660 states and 9300 transitions. [2020-11-06 23:04:40,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:40,167 INFO L276 IsEmpty]: Start isEmpty. Operand 5660 states and 9300 transitions. [2020-11-06 23:04:40,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-11-06 23:04:40,187 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:40,188 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] [2020-11-06 23:04:40,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:04:40,188 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:40,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:40,189 INFO L82 PathProgramCache]: Analyzing trace with hash -435715758, now seen corresponding path program 1 times [2020-11-06 23:04:40,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:40,191 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768903557] [2020-11-06 23:04:40,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:40,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:42,869 WARN L194 SmtUtils]: Spent 2.31 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:04:42,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:43,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:04:43,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768903557] [2020-11-06 23:04:43,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:43,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:43,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33519730] [2020-11-06 23:04:43,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:43,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:43,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:43,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:43,231 INFO L87 Difference]: Start difference. First operand 5660 states and 9300 transitions. Second operand 4 states. [2020-11-06 23:05:07,104 WARN L194 SmtUtils]: Spent 2.37 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:05:10,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:10,974 INFO L93 Difference]: Finished difference Result 16304 states and 26697 transitions. [2020-11-06 23:05:10,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:05:10,975 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-11-06 23:05:10,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:11,018 INFO L225 Difference]: With dead ends: 16304 [2020-11-06 23:05:11,018 INFO L226 Difference]: Without dead ends: 11043 [2020-11-06 23:05:11,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11043 states. [2020-11-06 23:05:11,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11043 to 10993. [2020-11-06 23:05:11,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10993 states. [2020-11-06 23:05:11,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10993 states to 10993 states and 17978 transitions. [2020-11-06 23:05:11,531 INFO L78 Accepts]: Start accepts. Automaton has 10993 states and 17978 transitions. Word has length 489 [2020-11-06 23:05:11,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:11,532 INFO L481 AbstractCegarLoop]: Abstraction has 10993 states and 17978 transitions. [2020-11-06 23:05:11,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:11,532 INFO L276 IsEmpty]: Start isEmpty. Operand 10993 states and 17978 transitions. [2020-11-06 23:05:11,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-11-06 23:05:11,559 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:11,559 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] [2020-11-06 23:05:11,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:05:11,560 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:11,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:11,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1204106643, now seen corresponding path program 1 times [2020-11-06 23:05:11,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:11,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161949169] [2020-11-06 23:05:11,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:14,088 WARN L194 SmtUtils]: Spent 2.32 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:05:14,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:14,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:14,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:14,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161949169] [2020-11-06 23:05:14,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:14,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:14,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204689279] [2020-11-06 23:05:14,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:14,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:14,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:14,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:14,272 INFO L87 Difference]: Start difference. First operand 10993 states and 17978 transitions. Second operand 4 states. [2020-11-06 23:05:40,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:40,245 INFO L93 Difference]: Finished difference Result 32721 states and 53488 transitions. [2020-11-06 23:05:40,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:05:40,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 489 [2020-11-06 23:05:40,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:40,292 INFO L225 Difference]: With dead ends: 32721 [2020-11-06 23:05:40,292 INFO L226 Difference]: Without dead ends: 21872 [2020-11-06 23:05:40,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:40,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21872 states. [2020-11-06 23:05:40,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21872 to 11091. [2020-11-06 23:05:40,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11091 states. [2020-11-06 23:05:40,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11091 states to 11091 states and 18129 transitions. [2020-11-06 23:05:40,876 INFO L78 Accepts]: Start accepts. Automaton has 11091 states and 18129 transitions. Word has length 489 [2020-11-06 23:05:40,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:40,876 INFO L481 AbstractCegarLoop]: Abstraction has 11091 states and 18129 transitions. [2020-11-06 23:05:40,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:40,877 INFO L276 IsEmpty]: Start isEmpty. Operand 11091 states and 18129 transitions. [2020-11-06 23:05:40,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2020-11-06 23:05:40,902 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:40,903 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] [2020-11-06 23:05:40,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:05:40,903 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:40,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:40,904 INFO L82 PathProgramCache]: Analyzing trace with hash -182668678, now seen corresponding path program 1 times [2020-11-06 23:05:40,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:40,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542086810] [2020-11-06 23:05:40,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:43,515 WARN L194 SmtUtils]: Spent 2.40 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:05:43,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:05:43,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542086810] [2020-11-06 23:05:43,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:43,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:43,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320124957] [2020-11-06 23:05:43,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:43,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:43,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:43,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:43,836 INFO L87 Difference]: Start difference. First operand 11091 states and 18129 transitions. Second operand 4 states. [2020-11-06 23:06:10,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:06:10,094 INFO L93 Difference]: Finished difference Result 32856 states and 53669 transitions. [2020-11-06 23:06:10,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:06:10,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 490 [2020-11-06 23:06:10,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:10,156 INFO L225 Difference]: With dead ends: 32856 [2020-11-06 23:06:10,156 INFO L226 Difference]: Without dead ends: 21989 [2020-11-06 23:06:10,178 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:10,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21989 states. [2020-11-06 23:06:10,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21989 to 11208. [2020-11-06 23:06:10,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11208 states. [2020-11-06 23:06:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11208 states to 11208 states and 18275 transitions. [2020-11-06 23:06:10,805 INFO L78 Accepts]: Start accepts. Automaton has 11208 states and 18275 transitions. Word has length 490 [2020-11-06 23:06:10,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:10,805 INFO L481 AbstractCegarLoop]: Abstraction has 11208 states and 18275 transitions. [2020-11-06 23:06:10,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:06:10,805 INFO L276 IsEmpty]: Start isEmpty. Operand 11208 states and 18275 transitions. [2020-11-06 23:06:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-11-06 23:06:10,826 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:10,826 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] [2020-11-06 23:06:10,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:06:10,827 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:10,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:10,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1121081195, now seen corresponding path program 1 times [2020-11-06 23:06:10,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:10,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409868000] [2020-11-06 23:06:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:10,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:13,395 WARN L194 SmtUtils]: Spent 2.33 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:06:13,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:13,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:13,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409868000] [2020-11-06 23:06:13,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:13,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:13,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374570724] [2020-11-06 23:06:13,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:13,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:13,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:13,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:13,696 INFO L87 Difference]: Start difference. First operand 11208 states and 18275 transitions. Second operand 4 states. [2020-11-06 23:06:33,264 WARN L194 SmtUtils]: Spent 2.47 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:06:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:06:33,545 INFO L93 Difference]: Finished difference Result 21558 states and 34735 transitions. [2020-11-06 23:06:33,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:06:33,546 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-11-06 23:06:33,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:33,568 INFO L225 Difference]: With dead ends: 21558 [2020-11-06 23:06:33,568 INFO L226 Difference]: Without dead ends: 14875 [2020-11-06 23:06:33,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:06:33,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14875 states. [2020-11-06 23:06:34,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14875 to 12752. [2020-11-06 23:06:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12752 states. [2020-11-06 23:06:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12752 states to 12752 states and 20835 transitions. [2020-11-06 23:06:34,239 INFO L78 Accepts]: Start accepts. Automaton has 12752 states and 20835 transitions. Word has length 491 [2020-11-06 23:06:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:34,240 INFO L481 AbstractCegarLoop]: Abstraction has 12752 states and 20835 transitions. [2020-11-06 23:06:34,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:06:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 12752 states and 20835 transitions. [2020-11-06 23:06:34,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-11-06 23:06:34,260 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:34,260 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] [2020-11-06 23:06:34,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:06:34,260 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:34,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:34,261 INFO L82 PathProgramCache]: Analyzing trace with hash -462641577, now seen corresponding path program 1 times [2020-11-06 23:06:34,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:34,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039742624] [2020-11-06 23:06:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:34,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:36,948 WARN L194 SmtUtils]: Spent 2.30 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:06:36,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:36,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:37,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:06:37,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039742624] [2020-11-06 23:06:37,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:37,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:06:37,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195898734] [2020-11-06 23:06:37,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:06:37,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:37,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:06:37,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:06:37,291 INFO L87 Difference]: Start difference. First operand 12752 states and 20835 transitions. Second operand 4 states. [2020-11-06 23:07:02,316 WARN L194 SmtUtils]: Spent 2.40 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:07:06,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:06,578 INFO L93 Difference]: Finished difference Result 36492 states and 59506 transitions. [2020-11-06 23:07:06,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:07:06,580 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 491 [2020-11-06 23:07:06,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:06,613 INFO L225 Difference]: With dead ends: 36492 [2020-11-06 23:07:06,613 INFO L226 Difference]: Without dead ends: 24709 [2020-11-06 23:07:06,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:07:06,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24709 states. [2020-11-06 23:07:07,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24709 to 24661. [2020-11-06 23:07:07,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24661 states. [2020-11-06 23:07:07,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24661 states to 24661 states and 40124 transitions. [2020-11-06 23:07:07,775 INFO L78 Accepts]: Start accepts. Automaton has 24661 states and 40124 transitions. Word has length 491 [2020-11-06 23:07:07,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:07,776 INFO L481 AbstractCegarLoop]: Abstraction has 24661 states and 40124 transitions. [2020-11-06 23:07:07,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:07:07,776 INFO L276 IsEmpty]: Start isEmpty. Operand 24661 states and 40124 transitions. [2020-11-06 23:07:07,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2020-11-06 23:07:07,802 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:07,803 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] [2020-11-06 23:07:07,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:07:07,803 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:07,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:07,803 INFO L82 PathProgramCache]: Analyzing trace with hash 1905383194, now seen corresponding path program 1 times [2020-11-06 23:07:07,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:07,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193588126] [2020-11-06 23:07:07,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:10,998 WARN L194 SmtUtils]: Spent 2.36 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:07:11,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:11,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:11,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:07:11,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193588126] [2020-11-06 23:07:11,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:11,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:07:11,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675907993] [2020-11-06 23:07:11,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:07:11,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:11,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:07:11,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:07:11,408 INFO L87 Difference]: Start difference. First operand 24661 states and 40124 transitions. Second operand 5 states. [2020-11-06 23:07:33,150 WARN L194 SmtUtils]: Spent 2.42 s on a formula simplification that was a NOOP. DAG size: 442 [2020-11-06 23:07:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:37,909 INFO L93 Difference]: Finished difference Result 72406 states and 117822 transitions. [2020-11-06 23:07:37,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:07:37,910 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 491 [2020-11-06 23:07:37,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:37,958 INFO L225 Difference]: With dead ends: 72406 [2020-11-06 23:07:37,958 INFO L226 Difference]: Without dead ends: 47963 [2020-11-06 23:07:37,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:07:38,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47963 states. [2020-11-06 23:07:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47963 to 47920. [2020-11-06 23:07:40,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47920 states. [2020-11-06 23:07:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47920 states to 47920 states and 77642 transitions. [2020-11-06 23:07:40,419 INFO L78 Accepts]: Start accepts. Automaton has 47920 states and 77642 transitions. Word has length 491 [2020-11-06 23:07:40,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:07:40,420 INFO L481 AbstractCegarLoop]: Abstraction has 47920 states and 77642 transitions. [2020-11-06 23:07:40,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:07:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 47920 states and 77642 transitions. [2020-11-06 23:07:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2020-11-06 23:07:40,475 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:07:40,476 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] [2020-11-06 23:07:40,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:07:40,476 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:07:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:07:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2044020272, now seen corresponding path program 1 times [2020-11-06 23:07:40,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:07:40,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209899114] [2020-11-06 23:07:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:07:40,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:43,215 WARN L194 SmtUtils]: Spent 2.28 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:07:43,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:07:43,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:07:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:07:43,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209899114] [2020-11-06 23:07:43,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:07:43,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:07:43,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148387205] [2020-11-06 23:07:43,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:07:43,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:07:43,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:07:43,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:07:43,827 INFO L87 Difference]: Start difference. First operand 47920 states and 77642 transitions. Second operand 4 states. [2020-11-06 23:08:12,246 WARN L194 SmtUtils]: Spent 2.40 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:08:17,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:08:17,596 INFO L93 Difference]: Finished difference Result 140769 states and 227903 transitions. [2020-11-06 23:08:17,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:08:17,597 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 493 [2020-11-06 23:08:17,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:08:17,707 INFO L225 Difference]: With dead ends: 140769 [2020-11-06 23:08:17,707 INFO L226 Difference]: Without dead ends: 94391 [2020-11-06 23:08:17,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:08:17,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94391 states. [2020-11-06 23:08:22,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94391 to 94352. [2020-11-06 23:08:22,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94352 states. [2020-11-06 23:08:22,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94352 states to 94352 states and 152302 transitions. [2020-11-06 23:08:22,662 INFO L78 Accepts]: Start accepts. Automaton has 94352 states and 152302 transitions. Word has length 493 [2020-11-06 23:08:22,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:08:22,663 INFO L481 AbstractCegarLoop]: Abstraction has 94352 states and 152302 transitions. [2020-11-06 23:08:22,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:08:22,663 INFO L276 IsEmpty]: Start isEmpty. Operand 94352 states and 152302 transitions. [2020-11-06 23:08:23,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-11-06 23:08:23,193 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:08:23,194 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] [2020-11-06 23:08:23,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:08:23,194 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:08:23,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:08:23,194 INFO L82 PathProgramCache]: Analyzing trace with hash 932982741, now seen corresponding path program 1 times [2020-11-06 23:08:23,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:08:23,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324726217] [2020-11-06 23:08:23,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:08:23,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:25,896 WARN L194 SmtUtils]: Spent 2.39 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:08:25,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:08:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:08:26,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:08:26,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324726217] [2020-11-06 23:08:26,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:08:26,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:08:26,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313294276] [2020-11-06 23:08:26,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:08:26,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:08:26,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:08:26,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:08:26,255 INFO L87 Difference]: Start difference. First operand 94352 states and 152302 transitions. Second operand 4 states. [2020-11-06 23:08:58,343 WARN L194 SmtUtils]: Spent 2.43 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:09:04,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:09:04,972 INFO L93 Difference]: Finished difference Result 275870 states and 444497 transitions. [2020-11-06 23:09:04,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:09:04,974 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 495 [2020-11-06 23:09:04,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:09:05,378 INFO L225 Difference]: With dead ends: 275870 [2020-11-06 23:09:05,378 INFO L226 Difference]: Without dead ends: 185226 [2020-11-06 23:09:05,612 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:09:05,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185226 states. [2020-11-06 23:09:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185226 to 185189. [2020-11-06 23:09:15,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185189 states. [2020-11-06 23:09:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185189 states to 185189 states and 297598 transitions. [2020-11-06 23:09:15,435 INFO L78 Accepts]: Start accepts. Automaton has 185189 states and 297598 transitions. Word has length 495 [2020-11-06 23:09:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:09:15,435 INFO L481 AbstractCegarLoop]: Abstraction has 185189 states and 297598 transitions. [2020-11-06 23:09:15,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:09:15,435 INFO L276 IsEmpty]: Start isEmpty. Operand 185189 states and 297598 transitions. [2020-11-06 23:09:15,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2020-11-06 23:09:15,893 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:09:15,893 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] [2020-11-06 23:09:15,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:09:15,894 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:09:15,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:09:15,895 INFO L82 PathProgramCache]: Analyzing trace with hash -825445032, now seen corresponding path program 1 times [2020-11-06 23:09:15,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:09:15,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540357626] [2020-11-06 23:09:15,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:09:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:19,475 WARN L194 SmtUtils]: Spent 2.50 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:09:19,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:09:19,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:09:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:09:19,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540357626] [2020-11-06 23:09:19,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:09:19,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:09:19,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453295619] [2020-11-06 23:09:19,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:09:19,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:09:19,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:09:19,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:09:19,857 INFO L87 Difference]: Start difference. First operand 185189 states and 297598 transitions. Second operand 5 states. [2020-11-06 23:09:54,554 WARN L194 SmtUtils]: Spent 2.60 s on a formula simplification that was a NOOP. DAG size: 442 [2020-11-06 23:10:04,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:10:04,229 INFO L93 Difference]: Finished difference Result 549946 states and 883880 transitions. [2020-11-06 23:10:04,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:10:04,231 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 495 [2020-11-06 23:10:04,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:10:04,987 INFO L225 Difference]: With dead ends: 549946 [2020-11-06 23:10:04,988 INFO L226 Difference]: Without dead ends: 365145 [2020-11-06 23:10:05,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:10:05,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365145 states. [2020-11-06 23:10:25,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365145 to 365113. [2020-11-06 23:10:25,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 365113 states. [2020-11-06 23:10:26,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365113 states to 365113 states and 584283 transitions. [2020-11-06 23:10:26,820 INFO L78 Accepts]: Start accepts. Automaton has 365113 states and 584283 transitions. Word has length 495 [2020-11-06 23:10:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:10:26,821 INFO L481 AbstractCegarLoop]: Abstraction has 365113 states and 584283 transitions. [2020-11-06 23:10:26,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:10:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 365113 states and 584283 transitions. [2020-11-06 23:10:27,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2020-11-06 23:10:27,625 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:10:27,625 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] [2020-11-06 23:10:27,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:10:27,626 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:10:27,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:10:27,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1571862685, now seen corresponding path program 1 times [2020-11-06 23:10:27,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:10:27,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386796048] [2020-11-06 23:10:27,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:10:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:30,530 WARN L194 SmtUtils]: Spent 2.62 s on a formula simplification that was a NOOP. DAG size: 436 [2020-11-06 23:10:30,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:10:30,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:10:31,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-06 23:10:31,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386796048] [2020-11-06 23:10:31,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:10:31,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:10:31,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943178932] [2020-11-06 23:10:31,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:10:31,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:10:31,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:10:31,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:10:31,024 INFO L87 Difference]: Start difference. First operand 365113 states and 584283 transitions. Second operand 4 states. [2020-11-06 23:11:25,670 WARN L194 SmtUtils]: Spent 2.46 s on a formula simplification that was a NOOP. DAG size: 441 [2020-11-06 23:11:41,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:11:41,032 INFO L93 Difference]: Finished difference Result 1082705 states and 1731568 transitions. [2020-11-06 23:11:41,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:11:41,034 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 497 [2020-11-06 23:11:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:11:42,538 INFO L225 Difference]: With dead ends: 1082705 [2020-11-06 23:11:42,538 INFO L226 Difference]: Without dead ends: 721230 [2020-11-06 23:11:43,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:11:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721230 states. [2020-11-06 23:12:23,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721230 to 721204. [2020-11-06 23:12:23,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 721204 states.