/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.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-06 23:01:47,054 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-06 23:01:47,057 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-06 23:01:47,096 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-06 23:01:47,097 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-06 23:01:47,098 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-06 23:01:47,100 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-06 23:01:47,102 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-06 23:01:47,105 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-06 23:01:47,106 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-06 23:01:47,107 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-06 23:01:47,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-06 23:01:47,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-06 23:01:47,110 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-06 23:01:47,112 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-06 23:01:47,113 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-06 23:01:47,114 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-06 23:01:47,115 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-06 23:01:47,117 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-06 23:01:47,119 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-06 23:01:47,121 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-06 23:01:47,122 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-06 23:01:47,124 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-06 23:01:47,125 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-06 23:01:47,128 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-06 23:01:47,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-06 23:01:47,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-06 23:01:47,151 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-06 23:01:47,153 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 23:01:47,223 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-06 23:01:47,223 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-06 23:01:47,225 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-06 23:01:47,225 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-06 23:01:47,226 INFO L138 SettingsManager]: * Use SBE=true [2020-11-06 23:01:47,226 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-06 23:01:47,226 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-06 23:01:47,227 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-06 23:01:47,227 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-06 23:01:47,227 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-06 23:01:47,228 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-06 23:01:47,229 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-06 23:01:47,229 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-06 23:01:47,229 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-06 23:01:47,229 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-06 23:01:47,230 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-06 23:01:47,230 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-06 23:01:47,230 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-06 23:01:47,231 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-06 23:01:47,231 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-06 23:01:47,231 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-06 23:01:47,232 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-06 23:01:47,232 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-06 23:01:47,232 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-06 23:01:47,233 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-06 23:01:47,233 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-06 23:01:47,233 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-06 23:01:47,233 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-06 23:01:47,234 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-06 23:01:47,234 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-06 23:01:47,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-06 23:01:47,781 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-06 23:01:47,785 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-06 23:01:47,786 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-06 23:01:47,787 INFO L275 PluginConnector]: CDTParser initialized [2020-11-06 23:01:47,788 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-06 23:01:47,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e05d3aba/6a4c65dc395c48cf943860f2aa8fe233/FLAGca80277f5 [2020-11-06 23:01:48,844 INFO L306 CDTParser]: Found 1 translation units. [2020-11-06 23:01:48,844 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-06 23:01:48,871 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e05d3aba/6a4c65dc395c48cf943860f2aa8fe233/FLAGca80277f5 [2020-11-06 23:01:48,965 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e05d3aba/6a4c65dc395c48cf943860f2aa8fe233 [2020-11-06 23:01:48,969 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-06 23:01:48,976 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-06 23:01:48,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-06 23:01:48,979 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-06 23:01:48,983 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-06 23:01:48,984 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:48" (1/1) ... [2020-11-06 23:01:48,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b7ef86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:48, skipping insertion in model container [2020-11-06 23:01:48,988 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 11:01:48" (1/1) ... [2020-11-06 23:01:48,996 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-06 23:01:49,144 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-06 23:01:50,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:01:50,578 INFO L203 MainTranslator]: Completed pre-run [2020-11-06 23:01:51,377 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-06 23:01:51,412 INFO L208 MainTranslator]: Completed translation [2020-11-06 23:01:51,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:51 WrapperNode [2020-11-06 23:01:51,414 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-06 23:01:51,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-06 23:01:51,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-06 23:01:51,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-06 23:01:51,431 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:51" (1/1) ... [2020-11-06 23:01:51,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:51" (1/1) ... [2020-11-06 23:01:51,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:51" (1/1) ... [2020-11-06 23:01:51,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:51" (1/1) ... [2020-11-06 23:01:51,574 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:51" (1/1) ... [2020-11-06 23:01:51,603 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:51" (1/1) ... [2020-11-06 23:01:51,616 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:51" (1/1) ... [2020-11-06 23:01:51,631 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-06 23:01:51,632 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-06 23:01:51,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-06 23:01:51,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-06 23:01:51,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:51" (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 23:01:51,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-06 23:01:51,753 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-06 23:01:51,753 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-06 23:01:51,753 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-11-06 23:01:51,754 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-06 23:01:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-06 23:01:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-06 23:01:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-06 23:01:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-06 23:01:51,754 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-11-06 23:01:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-11-06 23:01:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-11-06 23:01:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-11-06 23:01:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-11-06 23:01:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-11-06 23:01:51,755 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-11-06 23:01:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-11-06 23:01:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-11-06 23:01:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-11-06 23:01:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-11-06 23:01:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-06 23:01:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-11-06 23:01:51,756 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-06 23:01:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-06 23:01:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-06 23:01:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-06 23:01:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-06 23:01:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-06 23:01:51,757 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-06 23:01:55,485 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-06 23:01:55,486 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-11-06 23:01:55,491 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:55 BoogieIcfgContainer [2020-11-06 23:01:55,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-06 23:01:55,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-06 23:01:55,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-06 23:01:55,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-06 23:01:55,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 11:01:48" (1/3) ... [2020-11-06 23:01:55,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f474bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:55, skipping insertion in model container [2020-11-06 23:01:55,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 11:01:51" (2/3) ... [2020-11-06 23:01:55,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40f474bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 11:01:55, skipping insertion in model container [2020-11-06 23:01:55,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 11:01:55" (3/3) ... [2020-11-06 23:01:55,503 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.UNBOUNDED.pals.c.v+lhb-reducer.c [2020-11-06 23:01:55,519 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-06 23:01:55,525 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-06 23:01:55,539 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-06 23:01:55,592 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-06 23:01:55,592 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-06 23:01:55,592 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-06 23:01:55,592 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-06 23:01:55,592 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-06 23:01:55,592 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-06 23:01:55,593 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-06 23:01:55,593 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-06 23:01:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1020 states. [2020-11-06 23:01:55,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:01:55,687 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:01:55,688 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] [2020-11-06 23:01:55,691 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:01:55,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:01:55,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1028546938, now seen corresponding path program 1 times [2020-11-06 23:01:55,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:01:55,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148800127] [2020-11-06 23:01:55,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:01:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:57,480 WARN L194 SmtUtils]: Spent 696.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:01:57,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:01:57,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:01:57,757 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 23:01:57,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148800127] [2020-11-06 23:01:57,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:01:57,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:01:57,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985351887] [2020-11-06 23:01:57,771 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:01:57,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:01:57,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:01:57,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:01:57,790 INFO L87 Difference]: Start difference. First operand 1020 states. Second operand 4 states. [2020-11-06 23:01:58,895 WARN L194 SmtUtils]: Spent 937.00 ms on a formula simplification that was a NOOP. DAG size: 353 [2020-11-06 23:02:07,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:07,538 INFO L93 Difference]: Finished difference Result 1778 states and 3166 transitions. [2020-11-06 23:02:07,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:07,540 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-11-06 23:02:07,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:07,596 INFO L225 Difference]: With dead ends: 1778 [2020-11-06 23:02:07,597 INFO L226 Difference]: Without dead ends: 1472 [2020-11-06 23:02:07,603 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:07,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1472 states. [2020-11-06 23:02:07,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1472 to 1469. [2020-11-06 23:02:07,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1469 states. [2020-11-06 23:02:07,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1469 states to 1469 states and 2267 transitions. [2020-11-06 23:02:07,756 INFO L78 Accepts]: Start accepts. Automaton has 1469 states and 2267 transitions. Word has length 325 [2020-11-06 23:02:07,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:07,758 INFO L481 AbstractCegarLoop]: Abstraction has 1469 states and 2267 transitions. [2020-11-06 23:02:07,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:07,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1469 states and 2267 transitions. [2020-11-06 23:02:07,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-06 23:02:07,766 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:07,766 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] [2020-11-06 23:02:07,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-06 23:02:07,767 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:07,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:07,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1524659108, now seen corresponding path program 1 times [2020-11-06 23:02:07,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:07,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133283465] [2020-11-06 23:02:07,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:09,597 WARN L194 SmtUtils]: Spent 935.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:02:09,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:09,821 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 23:02:09,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133283465] [2020-11-06 23:02:09,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:09,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:02:09,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774608803] [2020-11-06 23:02:09,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:02:09,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:09,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:02:09,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:09,830 INFO L87 Difference]: Start difference. First operand 1469 states and 2267 transitions. Second operand 5 states. [2020-11-06 23:02:19,283 WARN L194 SmtUtils]: Spent 874.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-06 23:02:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:21,924 INFO L93 Difference]: Finished difference Result 4333 states and 6680 transitions. [2020-11-06 23:02:21,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:02:21,926 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-11-06 23:02:21,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:21,942 INFO L225 Difference]: With dead ends: 4333 [2020-11-06 23:02:21,942 INFO L226 Difference]: Without dead ends: 2879 [2020-11-06 23:02:21,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:02:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2879 states. [2020-11-06 23:02:22,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2879 to 2785. [2020-11-06 23:02:22,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2785 states. [2020-11-06 23:02:22,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2785 states to 2785 states and 4286 transitions. [2020-11-06 23:02:22,077 INFO L78 Accepts]: Start accepts. Automaton has 2785 states and 4286 transitions. Word has length 325 [2020-11-06 23:02:22,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:22,077 INFO L481 AbstractCegarLoop]: Abstraction has 2785 states and 4286 transitions. [2020-11-06 23:02:22,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:02:22,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2785 states and 4286 transitions. [2020-11-06 23:02:22,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-06 23:02:22,107 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:22,107 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] [2020-11-06 23:02:22,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-06 23:02:22,107 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:22,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:22,108 INFO L82 PathProgramCache]: Analyzing trace with hash -435041296, now seen corresponding path program 1 times [2020-11-06 23:02:22,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:22,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068077124] [2020-11-06 23:02:22,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:23,116 WARN L194 SmtUtils]: Spent 829.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:02:23,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:23,372 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 23:02:23,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068077124] [2020-11-06 23:02:23,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:23,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:23,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960679318] [2020-11-06 23:02:23,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:23,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:23,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:23,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:23,377 INFO L87 Difference]: Start difference. First operand 2785 states and 4286 transitions. Second operand 4 states. [2020-11-06 23:02:33,855 WARN L194 SmtUtils]: Spent 868.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-11-06 23:02:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:36,330 INFO L93 Difference]: Finished difference Result 8121 states and 12456 transitions. [2020-11-06 23:02:36,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:02:36,334 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-11-06 23:02:36,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:36,362 INFO L225 Difference]: With dead ends: 8121 [2020-11-06 23:02:36,362 INFO L226 Difference]: Without dead ends: 5465 [2020-11-06 23:02:36,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:02:36,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5465 states. [2020-11-06 23:02:36,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5465 to 5371. [2020-11-06 23:02:36,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5371 states. [2020-11-06 23:02:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5371 states to 5371 states and 8231 transitions. [2020-11-06 23:02:36,598 INFO L78 Accepts]: Start accepts. Automaton has 5371 states and 8231 transitions. Word has length 327 [2020-11-06 23:02:36,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:36,599 INFO L481 AbstractCegarLoop]: Abstraction has 5371 states and 8231 transitions. [2020-11-06 23:02:36,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:36,599 INFO L276 IsEmpty]: Start isEmpty. Operand 5371 states and 8231 transitions. [2020-11-06 23:02:36,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-11-06 23:02:36,651 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:36,652 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] [2020-11-06 23:02:36,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-06 23:02:36,653 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:36,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:36,653 INFO L82 PathProgramCache]: Analyzing trace with hash 63238411, now seen corresponding path program 1 times [2020-11-06 23:02:36,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:36,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118181559] [2020-11-06 23:02:36,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:37,703 WARN L194 SmtUtils]: Spent 888.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:02:37,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:37,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:37,834 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 23:02:37,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118181559] [2020-11-06 23:02:37,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:37,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:37,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631266236] [2020-11-06 23:02:37,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:37,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:37,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:37,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:37,838 INFO L87 Difference]: Start difference. First operand 5371 states and 8231 transitions. Second operand 4 states. [2020-11-06 23:02:50,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:02:50,046 INFO L93 Difference]: Finished difference Result 16036 states and 24568 transitions. [2020-11-06 23:02:50,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:02:50,048 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-11-06 23:02:50,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:02:50,095 INFO L225 Difference]: With dead ends: 16036 [2020-11-06 23:02:50,095 INFO L226 Difference]: Without dead ends: 10707 [2020-11-06 23:02:50,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:50,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10707 states. [2020-11-06 23:02:50,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10707 to 5390. [2020-11-06 23:02:50,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5390 states. [2020-11-06 23:02:50,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5390 states to 5390 states and 8259 transitions. [2020-11-06 23:02:50,388 INFO L78 Accepts]: Start accepts. Automaton has 5390 states and 8259 transitions. Word has length 327 [2020-11-06 23:02:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:02:50,388 INFO L481 AbstractCegarLoop]: Abstraction has 5390 states and 8259 transitions. [2020-11-06 23:02:50,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:02:50,389 INFO L276 IsEmpty]: Start isEmpty. Operand 5390 states and 8259 transitions. [2020-11-06 23:02:50,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-11-06 23:02:50,403 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:02:50,404 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] [2020-11-06 23:02:50,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-06 23:02:50,404 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:02:50,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:02:50,405 INFO L82 PathProgramCache]: Analyzing trace with hash -328565505, now seen corresponding path program 1 times [2020-11-06 23:02:50,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:02:50,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755541803] [2020-11-06 23:02:50,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:02:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:51,487 WARN L194 SmtUtils]: Spent 959.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:02:51,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:02:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:02:51,605 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 23:02:51,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755541803] [2020-11-06 23:02:51,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:02:51,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:02:51,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792919664] [2020-11-06 23:02:51,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:02:51,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:02:51,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:02:51,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:02:51,608 INFO L87 Difference]: Start difference. First operand 5390 states and 8259 transitions. Second operand 4 states. [2020-11-06 23:03:04,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:04,235 INFO L93 Difference]: Finished difference Result 16055 states and 24589 transitions. [2020-11-06 23:03:04,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:03:04,236 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-11-06 23:03:04,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:04,278 INFO L225 Difference]: With dead ends: 16055 [2020-11-06 23:03:04,278 INFO L226 Difference]: Without dead ends: 10725 [2020-11-06 23:03:04,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10725 states. [2020-11-06 23:03:04,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10725 to 5408. [2020-11-06 23:03:04,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5408 states. [2020-11-06 23:03:04,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5408 states to 5408 states and 8280 transitions. [2020-11-06 23:03:04,615 INFO L78 Accepts]: Start accepts. Automaton has 5408 states and 8280 transitions. Word has length 328 [2020-11-06 23:03:04,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:04,615 INFO L481 AbstractCegarLoop]: Abstraction has 5408 states and 8280 transitions. [2020-11-06 23:03:04,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 5408 states and 8280 transitions. [2020-11-06 23:03:04,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-11-06 23:03:04,631 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:04,632 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] [2020-11-06 23:03:04,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-06 23:03:04,632 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:04,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:04,637 INFO L82 PathProgramCache]: Analyzing trace with hash -108686891, now seen corresponding path program 1 times [2020-11-06 23:03:04,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:04,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283441407] [2020-11-06 23:03:04,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:04,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:05,766 WARN L194 SmtUtils]: Spent 886.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:03:05,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:05,929 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 23:03:05,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283441407] [2020-11-06 23:03:05,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:05,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:03:05,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914175039] [2020-11-06 23:03:05,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:03:05,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:05,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:03:05,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:03:05,932 INFO L87 Difference]: Start difference. First operand 5408 states and 8280 transitions. Second operand 4 states. [2020-11-06 23:03:16,645 WARN L194 SmtUtils]: Spent 926.00 ms on a formula simplification that was a NOOP. DAG size: 357 [2020-11-06 23:03:19,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:19,222 INFO L93 Difference]: Finished difference Result 15174 states and 23148 transitions. [2020-11-06 23:03:19,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:03:19,226 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-11-06 23:03:19,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:19,253 INFO L225 Difference]: With dead ends: 15174 [2020-11-06 23:03:19,253 INFO L226 Difference]: Without dead ends: 10011 [2020-11-06 23:03:19,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:19,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10011 states. [2020-11-06 23:03:19,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10011 to 9917. [2020-11-06 23:03:19,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9917 states. [2020-11-06 23:03:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9917 states to 9917 states and 15081 transitions. [2020-11-06 23:03:19,714 INFO L78 Accepts]: Start accepts. Automaton has 9917 states and 15081 transitions. Word has length 329 [2020-11-06 23:03:19,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:19,714 INFO L481 AbstractCegarLoop]: Abstraction has 9917 states and 15081 transitions. [2020-11-06 23:03:19,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:03:19,714 INFO L276 IsEmpty]: Start isEmpty. Operand 9917 states and 15081 transitions. [2020-11-06 23:03:19,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-11-06 23:03:19,737 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:19,738 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] [2020-11-06 23:03:19,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-06 23:03:19,738 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:19,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:19,739 INFO L82 PathProgramCache]: Analyzing trace with hash 43368088, now seen corresponding path program 1 times [2020-11-06 23:03:19,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:19,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696447579] [2020-11-06 23:03:19,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:19,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:21,075 WARN L194 SmtUtils]: Spent 891.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:03:21,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:21,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:21,219 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 23:03:21,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696447579] [2020-11-06 23:03:21,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:21,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:21,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231505891] [2020-11-06 23:03:21,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:21,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:21,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:21,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:21,223 INFO L87 Difference]: Start difference. First operand 9917 states and 15081 transitions. Second operand 5 states. [2020-11-06 23:03:30,769 WARN L194 SmtUtils]: Spent 901.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-06 23:03:33,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:33,714 INFO L93 Difference]: Finished difference Result 29088 states and 44140 transitions. [2020-11-06 23:03:33,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:03:33,715 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2020-11-06 23:03:33,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:33,756 INFO L225 Difference]: With dead ends: 29088 [2020-11-06 23:03:33,756 INFO L226 Difference]: Without dead ends: 19230 [2020-11-06 23:03:33,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19230 states. [2020-11-06 23:03:34,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19230 to 19143. [2020-11-06 23:03:34,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19143 states. [2020-11-06 23:03:34,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19143 states to 19143 states and 28872 transitions. [2020-11-06 23:03:34,674 INFO L78 Accepts]: Start accepts. Automaton has 19143 states and 28872 transitions. Word has length 329 [2020-11-06 23:03:34,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:34,675 INFO L481 AbstractCegarLoop]: Abstraction has 19143 states and 28872 transitions. [2020-11-06 23:03:34,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:34,675 INFO L276 IsEmpty]: Start isEmpty. Operand 19143 states and 28872 transitions. [2020-11-06 23:03:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:03:34,714 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:34,714 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] [2020-11-06 23:03:34,714 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-06 23:03:34,715 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:34,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:34,715 INFO L82 PathProgramCache]: Analyzing trace with hash -407361053, now seen corresponding path program 1 times [2020-11-06 23:03:34,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:34,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467714410] [2020-11-06 23:03:34,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:36,148 WARN L194 SmtUtils]: Spent 930.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:03:36,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:36,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:36,332 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 23:03:36,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467714410] [2020-11-06 23:03:36,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:36,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:36,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090682877] [2020-11-06 23:03:36,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:36,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:36,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:36,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:36,342 INFO L87 Difference]: Start difference. First operand 19143 states and 28872 transitions. Second operand 5 states. [2020-11-06 23:03:46,333 WARN L194 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-06 23:03:49,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:03:49,461 INFO L93 Difference]: Finished difference Result 56364 states and 84845 transitions. [2020-11-06 23:03:49,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:03:49,462 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-11-06 23:03:49,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:03:49,600 INFO L225 Difference]: With dead ends: 56364 [2020-11-06 23:03:49,600 INFO L226 Difference]: Without dead ends: 37342 [2020-11-06 23:03:49,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:03:49,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37342 states. [2020-11-06 23:03:51,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37342 to 37278. [2020-11-06 23:03:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37278 states. [2020-11-06 23:03:51,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37278 states to 37278 states and 55762 transitions. [2020-11-06 23:03:51,229 INFO L78 Accepts]: Start accepts. Automaton has 37278 states and 55762 transitions. Word has length 331 [2020-11-06 23:03:51,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:03:51,229 INFO L481 AbstractCegarLoop]: Abstraction has 37278 states and 55762 transitions. [2020-11-06 23:03:51,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:03:51,229 INFO L276 IsEmpty]: Start isEmpty. Operand 37278 states and 55762 transitions. [2020-11-06 23:03:51,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-06 23:03:51,287 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:03:51,287 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] [2020-11-06 23:03:51,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-06 23:03:51,288 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:03:51,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:03:51,288 INFO L82 PathProgramCache]: Analyzing trace with hash -218540222, now seen corresponding path program 1 times [2020-11-06 23:03:51,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:03:51,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588443326] [2020-11-06 23:03:51,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:03:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:52,681 WARN L194 SmtUtils]: Spent 1.04 s on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:03:52,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:03:52,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:03:52,871 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 23:03:52,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588443326] [2020-11-06 23:03:52,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:03:52,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:03:52,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052538894] [2020-11-06 23:03:52,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:03:52,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:03:52,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:03:52,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:03:52,874 INFO L87 Difference]: Start difference. First operand 37278 states and 55762 transitions. Second operand 5 states. [2020-11-06 23:04:04,111 WARN L194 SmtUtils]: Spent 1.08 s on a formula simplification that was a NOOP. DAG size: 358 [2020-11-06 23:04:07,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:07,960 INFO L93 Difference]: Finished difference Result 110056 states and 164347 transitions. [2020-11-06 23:04:07,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:04:07,961 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-11-06 23:04:07,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:08,117 INFO L225 Difference]: With dead ends: 110056 [2020-11-06 23:04:08,118 INFO L226 Difference]: Without dead ends: 73012 [2020-11-06 23:04:08,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:04:08,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73012 states. [2020-11-06 23:04:11,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73012 to 72880. [2020-11-06 23:04:11,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72880 states. [2020-11-06 23:04:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72880 states to 72880 states and 108228 transitions. [2020-11-06 23:04:11,752 INFO L78 Accepts]: Start accepts. Automaton has 72880 states and 108228 transitions. Word has length 331 [2020-11-06 23:04:11,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:11,752 INFO L481 AbstractCegarLoop]: Abstraction has 72880 states and 108228 transitions. [2020-11-06 23:04:11,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:04:11,752 INFO L276 IsEmpty]: Start isEmpty. Operand 72880 states and 108228 transitions. [2020-11-06 23:04:11,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-11-06 23:04:11,824 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:11,824 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] [2020-11-06 23:04:11,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-06 23:04:11,824 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:11,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1270469687, now seen corresponding path program 1 times [2020-11-06 23:04:11,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:11,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000511133] [2020-11-06 23:04:11,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:11,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:13,172 WARN L194 SmtUtils]: Spent 1.18 s on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:04:13,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:13,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:13,319 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 23:04:13,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000511133] [2020-11-06 23:04:13,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:13,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:13,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958778049] [2020-11-06 23:04:13,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:13,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:13,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:13,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:13,321 INFO L87 Difference]: Start difference. First operand 72880 states and 108228 transitions. Second operand 4 states. [2020-11-06 23:04:28,681 WARN L194 SmtUtils]: Spent 1.06 s on a formula simplification that was a NOOP. DAG size: 357 [2020-11-06 23:04:33,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:04:33,221 INFO L93 Difference]: Finished difference Result 214496 states and 317756 transitions. [2020-11-06 23:04:33,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-06 23:04:33,222 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-11-06 23:04:33,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:04:33,501 INFO L225 Difference]: With dead ends: 214496 [2020-11-06 23:04:33,501 INFO L226 Difference]: Without dead ends: 143000 [2020-11-06 23:04:33,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:04:33,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143000 states. [2020-11-06 23:04:40,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143000 to 142868. [2020-11-06 23:04:40,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142868 states. [2020-11-06 23:04:40,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142868 states to 142868 states and 210686 transitions. [2020-11-06 23:04:40,417 INFO L78 Accepts]: Start accepts. Automaton has 142868 states and 210686 transitions. Word has length 333 [2020-11-06 23:04:40,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:04:40,417 INFO L481 AbstractCegarLoop]: Abstraction has 142868 states and 210686 transitions. [2020-11-06 23:04:40,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:04:40,417 INFO L276 IsEmpty]: Start isEmpty. Operand 142868 states and 210686 transitions. [2020-11-06 23:04:40,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-11-06 23:04:40,769 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:04:40,769 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] [2020-11-06 23:04:40,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-06 23:04:40,770 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:04:40,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:04:40,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1669966226, now seen corresponding path program 1 times [2020-11-06 23:04:40,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:04:40,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244085324] [2020-11-06 23:04:40,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:04:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:41,754 WARN L194 SmtUtils]: Spent 858.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:04:41,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:04:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:04:42,110 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 23:04:42,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244085324] [2020-11-06 23:04:42,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:04:42,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:04:42,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859719284] [2020-11-06 23:04:42,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:04:42,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:04:42,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:04:42,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:04:42,114 INFO L87 Difference]: Start difference. First operand 142868 states and 210686 transitions. Second operand 4 states. [2020-11-06 23:05:07,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:07,408 INFO L93 Difference]: Finished difference Result 427470 states and 630225 transitions. [2020-11-06 23:05:07,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:05:07,409 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 333 [2020-11-06 23:05:07,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:08,064 INFO L225 Difference]: With dead ends: 427470 [2020-11-06 23:05:08,064 INFO L226 Difference]: Without dead ends: 285268 [2020-11-06 23:05:08,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:08,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285268 states. [2020-11-06 23:05:16,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285268 to 143078. [2020-11-06 23:05:16,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143078 states. [2020-11-06 23:05:17,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143078 states to 143078 states and 210998 transitions. [2020-11-06 23:05:17,064 INFO L78 Accepts]: Start accepts. Automaton has 143078 states and 210998 transitions. Word has length 333 [2020-11-06 23:05:17,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:17,064 INFO L481 AbstractCegarLoop]: Abstraction has 143078 states and 210998 transitions. [2020-11-06 23:05:17,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:17,065 INFO L276 IsEmpty]: Start isEmpty. Operand 143078 states and 210998 transitions. [2020-11-06 23:05:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2020-11-06 23:05:17,200 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:17,201 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] [2020-11-06 23:05:17,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-06 23:05:17,201 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:17,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:17,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1899161634, now seen corresponding path program 1 times [2020-11-06 23:05:17,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:17,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962293723] [2020-11-06 23:05:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:17,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:18,488 WARN L194 SmtUtils]: Spent 1.16 s on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:05:18,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:18,607 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 23:05:18,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962293723] [2020-11-06 23:05:18,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:18,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-06 23:05:18,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612078617] [2020-11-06 23:05:18,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-06 23:05:18,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:18,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-06 23:05:18,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:18,610 INFO L87 Difference]: Start difference. First operand 143078 states and 210998 transitions. Second operand 4 states. [2020-11-06 23:05:45,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:05:45,465 INFO L93 Difference]: Finished difference Result 427658 states and 630431 transitions. [2020-11-06 23:05:45,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-06 23:05:45,466 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 334 [2020-11-06 23:05:45,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:05:46,087 INFO L225 Difference]: With dead ends: 427658 [2020-11-06 23:05:46,087 INFO L226 Difference]: Without dead ends: 285446 [2020-11-06 23:05:46,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-06 23:05:46,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285446 states. [2020-11-06 23:05:54,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285446 to 143308. [2020-11-06 23:05:54,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143308 states. [2020-11-06 23:05:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143308 states to 143308 states and 211262 transitions. [2020-11-06 23:05:55,214 INFO L78 Accepts]: Start accepts. Automaton has 143308 states and 211262 transitions. Word has length 334 [2020-11-06 23:05:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:05:55,214 INFO L481 AbstractCegarLoop]: Abstraction has 143308 states and 211262 transitions. [2020-11-06 23:05:55,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-06 23:05:55,215 INFO L276 IsEmpty]: Start isEmpty. Operand 143308 states and 211262 transitions. [2020-11-06 23:05:55,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-11-06 23:05:55,615 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:05:55,616 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] [2020-11-06 23:05:55,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-06 23:05:55,616 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:05:55,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:05:55,617 INFO L82 PathProgramCache]: Analyzing trace with hash -682733601, now seen corresponding path program 1 times [2020-11-06 23:05:55,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:05:55,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831608839] [2020-11-06 23:05:55,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:05:55,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:56,923 WARN L194 SmtUtils]: Spent 900.00 ms on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:05:56,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:05:56,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:05:57,246 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 23:05:57,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831608839] [2020-11-06 23:05:57,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:05:57,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:05:57,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81770229] [2020-11-06 23:05:57,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:05:57,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:05:57,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:05:57,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:05:57,248 INFO L87 Difference]: Start difference. First operand 143308 states and 211262 transitions. Second operand 5 states. [2020-11-06 23:06:16,589 WARN L194 SmtUtils]: Spent 968.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-06 23:06:24,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:06:24,098 INFO L93 Difference]: Finished difference Result 421773 states and 620355 transitions. [2020-11-06 23:06:24,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:06:24,099 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 335 [2020-11-06 23:06:24,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:06:24,529 INFO L225 Difference]: With dead ends: 421773 [2020-11-06 23:06:24,529 INFO L226 Difference]: Without dead ends: 279050 [2020-11-06 23:06:24,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:06:24,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279050 states. [2020-11-06 23:06:40,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279050 to 278948. [2020-11-06 23:06:40,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278948 states. [2020-11-06 23:06:41,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278948 states to 278948 states and 407484 transitions. [2020-11-06 23:06:41,350 INFO L78 Accepts]: Start accepts. Automaton has 278948 states and 407484 transitions. Word has length 335 [2020-11-06 23:06:41,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-06 23:06:41,350 INFO L481 AbstractCegarLoop]: Abstraction has 278948 states and 407484 transitions. [2020-11-06 23:06:41,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-06 23:06:41,350 INFO L276 IsEmpty]: Start isEmpty. Operand 278948 states and 407484 transitions. [2020-11-06 23:06:42,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-11-06 23:06:42,310 INFO L414 BasicCegarLoop]: Found error trace [2020-11-06 23:06:42,311 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] [2020-11-06 23:06:42,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-06 23:06:42,311 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-06 23:06:42,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-06 23:06:42,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1044997211, now seen corresponding path program 1 times [2020-11-06 23:06:42,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-06 23:06:42,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489810938] [2020-11-06 23:06:42,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-06 23:06:42,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:44,656 WARN L194 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 352 [2020-11-06 23:06:44,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-06 23:06:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-06 23:06:45,027 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 23:06:45,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489810938] [2020-11-06 23:06:45,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-06 23:06:45,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-06 23:06:45,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772710129] [2020-11-06 23:06:45,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-06 23:06:45,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-06 23:06:45,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-06 23:06:45,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-06 23:06:45,029 INFO L87 Difference]: Start difference. First operand 278948 states and 407484 transitions. Second operand 5 states. [2020-11-06 23:07:07,939 WARN L194 SmtUtils]: Spent 999.00 ms on a formula simplification that was a NOOP. DAG size: 358 [2020-11-06 23:07:16,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-06 23:07:16,170 INFO L93 Difference]: Finished difference Result 578117 states and 844594 transitions. [2020-11-06 23:07:16,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-06 23:07:16,171 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 337 [2020-11-06 23:07:16,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-06 23:07:16,835 INFO L225 Difference]: With dead ends: 578117 [2020-11-06 23:07:16,836 INFO L226 Difference]: Without dead ends: 300791 [2020-11-06 23:07:17,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-06 23:07:17,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300791 states.