/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.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-23 19:01:23,914 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 19:01:23,917 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 19:01:23,951 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-23 19:01:23,952 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-23 19:01:23,954 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-23 19:01:23,956 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-23 19:01:23,958 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-23 19:01:23,960 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-23 19:01:23,962 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-23 19:01:23,963 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-23 19:01:23,965 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-23 19:01:23,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 19:01:23,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 19:01:23,969 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 19:01:23,970 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 19:01:23,972 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 19:01:23,973 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 19:01:23,977 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 19:01:23,995 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 19:01:24,003 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 19:01:24,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 19:01:24,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 19:01:24,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 19:01:24,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 19:01:24,044 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 19:01:24,045 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 19:01:24,045 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 19:01:24,047 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-23 19:01:24,078 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 19:01:24,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 19:01:24,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-23 19:01:24,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-23 19:01:24,081 INFO L138 SettingsManager]: * Use SBE=true [2020-10-23 19:01:24,082 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 19:01:24,082 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 19:01:24,083 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 19:01:24,083 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 19:01:24,083 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 19:01:24,084 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 19:01:24,084 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 19:01:24,085 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 19:01:24,085 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 19:01:24,085 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 19:01:24,085 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 19:01:24,085 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 19:01:24,086 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 19:01:24,086 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-23 19:01:24,086 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 19:01:24,086 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 19:01:24,086 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:01:24,087 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 19:01:24,087 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-23 19:01:24,087 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-23 19:01:24,087 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-23 19:01:24,088 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-23 19:01:24,088 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 19:01:24,088 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-23 19:01:24,088 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 19:01:24,537 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 19:01:24,582 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 19:01:24,585 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 19:01:24,587 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 19:01:24,588 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 19:01:24,589 INFO L432 ainManager$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.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-23 19:01:24,681 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b315085c/e3d0039692a64892bd70ce9d01a6eafd/FLAG982ddfe99 [2020-10-23 19:01:25,455 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 19:01:25,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-23 19:01:25,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b315085c/e3d0039692a64892bd70ce9d01a6eafd/FLAG982ddfe99 [2020-10-23 19:01:25,583 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8b315085c/e3d0039692a64892bd70ce9d01a6eafd [2020-10-23 19:01:25,587 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 19:01:25,596 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 19:01:25,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 19:01:25,602 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 19:01:25,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 19:01:25,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:01:25" (1/1) ... [2020-10-23 19:01:25,617 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4330c78e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:25, skipping insertion in model container [2020-10-23 19:01:25,617 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 07:01:25" (1/1) ... [2020-10-23 19:01:25,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 19:01:25,762 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 19:01:27,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:01:27,022 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 19:01:27,491 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 19:01:27,524 INFO L208 MainTranslator]: Completed translation [2020-10-23 19:01:27,525 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:27 WrapperNode [2020-10-23 19:01:27,526 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 19:01:27,527 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 19:01:27,527 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 19:01:27,527 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 19:01:27,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:27" (1/1) ... [2020-10-23 19:01:27,543 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:27" (1/1) ... [2020-10-23 19:01:27,595 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:27" (1/1) ... [2020-10-23 19:01:27,596 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:27" (1/1) ... [2020-10-23 19:01:27,663 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:27" (1/1) ... [2020-10-23 19:01:27,699 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:27" (1/1) ... [2020-10-23 19:01:27,708 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:27" (1/1) ... [2020-10-23 19:01:27,723 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 19:01:27,724 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 19:01:27,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 19:01:27,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 19:01:27,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 19:01:27,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 19:01:27,806 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 19:01:27,806 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 19:01:27,806 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-23 19:01:27,806 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 19:01:27,807 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 19:01:27,807 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 19:01:27,807 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 19:01:27,807 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 19:01:27,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-23 19:01:27,807 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 19:01:27,808 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-23 19:01:27,808 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-23 19:01:27,808 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-23 19:01:27,808 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-23 19:01:27,808 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-23 19:01:27,808 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-23 19:01:27,809 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-23 19:01:27,809 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-23 19:01:27,809 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-23 19:01:27,809 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-23 19:01:27,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 19:01:27,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 19:01:27,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 19:01:27,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 19:01:27,810 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 19:01:27,810 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 19:01:27,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 19:01:31,018 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 19:01:31,018 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-23 19:01:31,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:01:31 BoogieIcfgContainer [2020-10-23 19:01:31,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 19:01:31,023 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 19:01:31,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 19:01:31,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 19:01:31,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 07:01:25" (1/3) ... [2020-10-23 19:01:31,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5d1703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:01:31, skipping insertion in model container [2020-10-23 19:01:31,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 07:01:27" (2/3) ... [2020-10-23 19:01:31,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d5d1703 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 07:01:31, skipping insertion in model container [2020-10-23 19:01:31,030 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 07:01:31" (3/3) ... [2020-10-23 19:01:31,031 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.3.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-23 19:01:31,044 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-23 19:01:31,053 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 19:01:31,067 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 19:01:31,115 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 19:01:31,115 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 19:01:31,115 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-23 19:01:31,116 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 19:01:31,116 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 19:01:31,116 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 19:01:31,116 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 19:01:31,116 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 19:01:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states. [2020-10-23 19:01:31,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-23 19:01:31,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:31,203 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] [2020-10-23 19:01:31,204 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:31,211 INFO L82 PathProgramCache]: Analyzing trace with hash -540047237, now seen corresponding path program 1 times [2020-10-23 19:01:31,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:31,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016749392] [2020-10-23 19:01:31,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:31,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:33,266 WARN L193 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:01:33,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:33,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:33,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:01:33,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016749392] [2020-10-23 19:01:33,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:33,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:33,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291627133] [2020-10-23 19:01:33,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:33,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:33,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:33,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:33,582 INFO L87 Difference]: Start difference. First operand 799 states. Second operand 4 states. [2020-10-23 19:01:34,614 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-23 19:01:40,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:40,422 INFO L93 Difference]: Finished difference Result 1496 states and 2629 transitions. [2020-10-23 19:01:40,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:40,425 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-23 19:01:40,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:40,460 INFO L225 Difference]: With dead ends: 1496 [2020-10-23 19:01:40,460 INFO L226 Difference]: Without dead ends: 1286 [2020-10-23 19:01:40,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:01:40,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2020-10-23 19:01:40,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1283. [2020-10-23 19:01:40,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1283 states. [2020-10-23 19:01:40,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1283 states to 1283 states and 2006 transitions. [2020-10-23 19:01:40,650 INFO L78 Accepts]: Start accepts. Automaton has 1283 states and 2006 transitions. Word has length 325 [2020-10-23 19:01:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:40,656 INFO L481 AbstractCegarLoop]: Abstraction has 1283 states and 2006 transitions. [2020-10-23 19:01:40,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 1283 states and 2006 transitions. [2020-10-23 19:01:40,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-23 19:01:40,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:40,666 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] [2020-10-23 19:01:40,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 19:01:40,667 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:40,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:40,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1948349173, now seen corresponding path program 1 times [2020-10-23 19:01:40,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:40,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677788515] [2020-10-23 19:01:40,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:40,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:41,982 WARN L193 SmtUtils]: Spent 892.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:01:41,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:42,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:01:42,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677788515] [2020-10-23 19:01:42,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:42,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:42,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593787367] [2020-10-23 19:01:42,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:42,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:42,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:42,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:42,227 INFO L87 Difference]: Start difference. First operand 1283 states and 2006 transitions. Second operand 4 states. [2020-10-23 19:01:42,970 WARN L193 SmtUtils]: Spent 688.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-23 19:01:47,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:47,947 INFO L93 Difference]: Finished difference Result 2615 states and 4121 transitions. [2020-10-23 19:01:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:47,947 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-23 19:01:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:47,963 INFO L225 Difference]: With dead ends: 2615 [2020-10-23 19:01:47,963 INFO L226 Difference]: Without dead ends: 2250 [2020-10-23 19:01:47,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:01:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2250 states. [2020-10-23 19:01:48,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2250 to 2247. [2020-10-23 19:01:48,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2247 states. [2020-10-23 19:01:48,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2247 states to 2247 states and 3508 transitions. [2020-10-23 19:01:48,071 INFO L78 Accepts]: Start accepts. Automaton has 2247 states and 3508 transitions. Word has length 325 [2020-10-23 19:01:48,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:48,072 INFO L481 AbstractCegarLoop]: Abstraction has 2247 states and 3508 transitions. [2020-10-23 19:01:48,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:48,072 INFO L276 IsEmpty]: Start isEmpty. Operand 2247 states and 3508 transitions. [2020-10-23 19:01:48,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-23 19:01:48,081 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:48,081 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] [2020-10-23 19:01:48,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 19:01:48,082 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:48,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:48,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1821978594, now seen corresponding path program 1 times [2020-10-23 19:01:48,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:48,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761955716] [2020-10-23 19:01:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:48,997 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:01:48,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:49,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:01:49,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761955716] [2020-10-23 19:01:49,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:49,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:49,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933112160] [2020-10-23 19:01:49,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:49,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:49,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:49,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:49,205 INFO L87 Difference]: Start difference. First operand 2247 states and 3508 transitions. Second operand 4 states. [2020-10-23 19:01:49,943 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-23 19:01:54,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:01:54,677 INFO L93 Difference]: Finished difference Result 4825 states and 7596 transitions. [2020-10-23 19:01:54,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:01:54,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-23 19:01:54,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:01:54,702 INFO L225 Difference]: With dead ends: 4825 [2020-10-23 19:01:54,703 INFO L226 Difference]: Without dead ends: 4142 [2020-10-23 19:01:54,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:01:54,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2020-10-23 19:01:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 4139. [2020-10-23 19:01:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4139 states. [2020-10-23 19:01:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4139 states to 4139 states and 6448 transitions. [2020-10-23 19:01:54,868 INFO L78 Accepts]: Start accepts. Automaton has 4139 states and 6448 transitions. Word has length 325 [2020-10-23 19:01:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:01:54,869 INFO L481 AbstractCegarLoop]: Abstraction has 4139 states and 6448 transitions. [2020-10-23 19:01:54,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:01:54,869 INFO L276 IsEmpty]: Start isEmpty. Operand 4139 states and 6448 transitions. [2020-10-23 19:01:54,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-23 19:01:54,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:01:54,884 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] [2020-10-23 19:01:54,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 19:01:54,884 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:01:54,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:01:54,885 INFO L82 PathProgramCache]: Analyzing trace with hash 479714806, now seen corresponding path program 1 times [2020-10-23 19:01:54,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:01:54,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610973354] [2020-10-23 19:01:54,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:01:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:55,897 WARN L193 SmtUtils]: Spent 690.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:01:55,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:01:55,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:01:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:01:56,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610973354] [2020-10-23 19:01:56,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:01:56,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:01:56,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009919326] [2020-10-23 19:01:56,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:01:56,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:01:56,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:01:56,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:01:56,045 INFO L87 Difference]: Start difference. First operand 4139 states and 6448 transitions. Second operand 4 states. [2020-10-23 19:01:56,872 WARN L193 SmtUtils]: Spent 771.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2020-10-23 19:02:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:01,558 INFO L93 Difference]: Finished difference Result 9129 states and 14344 transitions. [2020-10-23 19:02:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:01,559 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 325 [2020-10-23 19:02:01,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:01,601 INFO L225 Difference]: With dead ends: 9129 [2020-10-23 19:02:01,601 INFO L226 Difference]: Without dead ends: 7854 [2020-10-23 19:02:01,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:01,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7854 states. [2020-10-23 19:02:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7854 to 7851. [2020-10-23 19:02:01,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7851 states. [2020-10-23 19:02:01,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7851 states to 7851 states and 12200 transitions. [2020-10-23 19:02:01,882 INFO L78 Accepts]: Start accepts. Automaton has 7851 states and 12200 transitions. Word has length 325 [2020-10-23 19:02:01,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:01,883 INFO L481 AbstractCegarLoop]: Abstraction has 7851 states and 12200 transitions. [2020-10-23 19:02:01,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:01,884 INFO L276 IsEmpty]: Start isEmpty. Operand 7851 states and 12200 transitions. [2020-10-23 19:02:01,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-10-23 19:02:01,905 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:01,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-23 19:02:01,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 19:02:01,906 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:01,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:01,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1772496259, now seen corresponding path program 1 times [2020-10-23 19:02:01,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:01,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439767978] [2020-10-23 19:02:01,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:02,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:03,323 WARN L193 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:02:03,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:03,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:03,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:03,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439767978] [2020-10-23 19:02:03,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:03,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:02:03,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626323783] [2020-10-23 19:02:03,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:02:03,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:03,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:02:03,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:03,509 INFO L87 Difference]: Start difference. First operand 7851 states and 12200 transitions. Second operand 5 states. [2020-10-23 19:02:10,326 WARN L193 SmtUtils]: Spent 715.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-23 19:02:12,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:12,347 INFO L93 Difference]: Finished difference Result 23226 states and 36057 transitions. [2020-10-23 19:02:12,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:02:12,350 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 325 [2020-10-23 19:02:12,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:12,428 INFO L225 Difference]: With dead ends: 23226 [2020-10-23 19:02:12,429 INFO L226 Difference]: Without dead ends: 15390 [2020-10-23 19:02:12,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:02:12,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15390 states. [2020-10-23 19:02:13,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15390 to 15387. [2020-10-23 19:02:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15387 states. [2020-10-23 19:02:13,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15387 states to 15387 states and 23773 transitions. [2020-10-23 19:02:13,051 INFO L78 Accepts]: Start accepts. Automaton has 15387 states and 23773 transitions. Word has length 325 [2020-10-23 19:02:13,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:13,051 INFO L481 AbstractCegarLoop]: Abstraction has 15387 states and 23773 transitions. [2020-10-23 19:02:13,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:02:13,051 INFO L276 IsEmpty]: Start isEmpty. Operand 15387 states and 23773 transitions. [2020-10-23 19:02:13,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-23 19:02:13,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:13,084 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] [2020-10-23 19:02:13,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-23 19:02:13,084 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:13,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:13,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2109001558, now seen corresponding path program 1 times [2020-10-23 19:02:13,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:13,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934436665] [2020-10-23 19:02:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:13,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:14,079 WARN L193 SmtUtils]: Spent 800.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:02:14,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:14,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:14,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934436665] [2020-10-23 19:02:14,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:14,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:14,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848315846] [2020-10-23 19:02:14,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:14,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:14,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:14,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:14,245 INFO L87 Difference]: Start difference. First operand 15387 states and 23773 transitions. Second operand 4 states. [2020-10-23 19:02:22,605 WARN L193 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-23 19:02:24,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:24,725 INFO L93 Difference]: Finished difference Result 45422 states and 70075 transitions. [2020-10-23 19:02:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:02:24,725 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-23 19:02:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:24,799 INFO L225 Difference]: With dead ends: 45422 [2020-10-23 19:02:24,800 INFO L226 Difference]: Without dead ends: 30164 [2020-10-23 19:02:24,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:02:24,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30164 states. [2020-10-23 19:02:25,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30164 to 30161. [2020-10-23 19:02:25,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30161 states. [2020-10-23 19:02:26,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30161 states to 30161 states and 46322 transitions. [2020-10-23 19:02:26,020 INFO L78 Accepts]: Start accepts. Automaton has 30161 states and 46322 transitions. Word has length 327 [2020-10-23 19:02:26,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:26,020 INFO L481 AbstractCegarLoop]: Abstraction has 30161 states and 46322 transitions. [2020-10-23 19:02:26,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:26,020 INFO L276 IsEmpty]: Start isEmpty. Operand 30161 states and 46322 transitions. [2020-10-23 19:02:26,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2020-10-23 19:02:26,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:26,074 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] [2020-10-23 19:02:26,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-23 19:02:26,075 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:26,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1610721851, now seen corresponding path program 1 times [2020-10-23 19:02:26,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:26,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253849504] [2020-10-23 19:02:26,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:26,881 WARN L193 SmtUtils]: Spent 677.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:02:26,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:26,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:26,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:26,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253849504] [2020-10-23 19:02:26,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:26,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:26,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29317987] [2020-10-23 19:02:26,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:26,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:26,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:26,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:26,983 INFO L87 Difference]: Start difference. First operand 30161 states and 46322 transitions. Second operand 4 states. [2020-10-23 19:02:37,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:37,663 INFO L93 Difference]: Finished difference Result 90406 states and 138841 transitions. [2020-10-23 19:02:37,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:02:37,663 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2020-10-23 19:02:37,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:37,795 INFO L225 Difference]: With dead ends: 90406 [2020-10-23 19:02:37,795 INFO L226 Difference]: Without dead ends: 60287 [2020-10-23 19:02:37,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:37,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60287 states. [2020-10-23 19:02:39,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60287 to 30180. [2020-10-23 19:02:39,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30180 states. [2020-10-23 19:02:39,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30180 states to 30180 states and 46350 transitions. [2020-10-23 19:02:39,375 INFO L78 Accepts]: Start accepts. Automaton has 30180 states and 46350 transitions. Word has length 327 [2020-10-23 19:02:39,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:39,375 INFO L481 AbstractCegarLoop]: Abstraction has 30180 states and 46350 transitions. [2020-10-23 19:02:39,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:39,375 INFO L276 IsEmpty]: Start isEmpty. Operand 30180 states and 46350 transitions. [2020-10-23 19:02:39,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2020-10-23 19:02:39,430 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:39,430 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] [2020-10-23 19:02:39,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-23 19:02:39,430 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:39,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:39,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1243961186, now seen corresponding path program 1 times [2020-10-23 19:02:39,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:39,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568675309] [2020-10-23 19:02:39,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:40,229 WARN L193 SmtUtils]: Spent 673.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:02:40,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:40,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:40,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:40,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568675309] [2020-10-23 19:02:40,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:40,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:40,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531586965] [2020-10-23 19:02:40,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:40,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:40,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:40,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:40,569 INFO L87 Difference]: Start difference. First operand 30180 states and 46350 transitions. Second operand 4 states. [2020-10-23 19:02:51,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:02:51,771 INFO L93 Difference]: Finished difference Result 90425 states and 138862 transitions. [2020-10-23 19:02:51,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-23 19:02:51,771 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2020-10-23 19:02:51,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:02:51,876 INFO L225 Difference]: With dead ends: 90425 [2020-10-23 19:02:51,876 INFO L226 Difference]: Without dead ends: 60305 [2020-10-23 19:02:51,922 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 [2020-10-23 19:02:51,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60305 states. [2020-10-23 19:02:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60305 to 30198. [2020-10-23 19:02:53,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30198 states. [2020-10-23 19:02:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30198 states to 30198 states and 46371 transitions. [2020-10-23 19:02:53,472 INFO L78 Accepts]: Start accepts. Automaton has 30198 states and 46371 transitions. Word has length 328 [2020-10-23 19:02:53,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:02:53,472 INFO L481 AbstractCegarLoop]: Abstraction has 30198 states and 46371 transitions. [2020-10-23 19:02:53,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:02:53,473 INFO L276 IsEmpty]: Start isEmpty. Operand 30198 states and 46371 transitions. [2020-10-23 19:02:53,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-23 19:02:53,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:02:53,533 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] [2020-10-23 19:02:53,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-23 19:02:53,533 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:02:53,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:02:53,534 INFO L82 PathProgramCache]: Analyzing trace with hash -974279761, now seen corresponding path program 1 times [2020-10-23 19:02:53,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:02:53,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469434892] [2020-10-23 19:02:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:02:53,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:54,796 WARN L193 SmtUtils]: Spent 801.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:02:54,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:02:54,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:02:54,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:02:54,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469434892] [2020-10-23 19:02:54,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:02:54,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-23 19:02:54,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015156152] [2020-10-23 19:02:54,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-23 19:02:54,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:02:54,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-23 19:02:54,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-23 19:02:54,989 INFO L87 Difference]: Start difference. First operand 30198 states and 46371 transitions. Second operand 4 states. [2020-10-23 19:03:04,412 WARN L193 SmtUtils]: Spent 730.00 ms on a formula simplification that was a NOOP. DAG size: 318 [2020-10-23 19:03:06,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:06,977 INFO L93 Difference]: Finished difference Result 85719 states and 131396 transitions. [2020-10-23 19:03:06,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 19:03:06,978 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 329 [2020-10-23 19:03:06,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:07,059 INFO L225 Difference]: With dead ends: 85719 [2020-10-23 19:03:07,060 INFO L226 Difference]: Without dead ends: 55766 [2020-10-23 19:03:07,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:07,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55766 states. [2020-10-23 19:03:09,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55766 to 55763. [2020-10-23 19:03:09,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55763 states. [2020-10-23 19:03:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55763 states to 55763 states and 85029 transitions. [2020-10-23 19:03:09,253 INFO L78 Accepts]: Start accepts. Automaton has 55763 states and 85029 transitions. Word has length 329 [2020-10-23 19:03:09,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:09,253 INFO L481 AbstractCegarLoop]: Abstraction has 55763 states and 85029 transitions. [2020-10-23 19:03:09,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-23 19:03:09,253 INFO L276 IsEmpty]: Start isEmpty. Operand 55763 states and 85029 transitions. [2020-10-23 19:03:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2020-10-23 19:03:09,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:09,313 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] [2020-10-23 19:03:09,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-23 19:03:09,313 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:09,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:09,314 INFO L82 PathProgramCache]: Analyzing trace with hash -822224782, now seen corresponding path program 1 times [2020-10-23 19:03:09,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:09,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842472167] [2020-10-23 19:03:09,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:09,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:10,638 WARN L193 SmtUtils]: Spent 712.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:03:10,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:10,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:10,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842472167] [2020-10-23 19:03:10,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:10,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:10,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379472462] [2020-10-23 19:03:10,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:10,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:10,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:10,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:10,914 INFO L87 Difference]: Start difference. First operand 55763 states and 85029 transitions. Second operand 5 states. [2020-10-23 19:03:20,554 WARN L193 SmtUtils]: Spent 738.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-23 19:03:23,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:23,842 INFO L93 Difference]: Finished difference Result 164669 states and 250700 transitions. [2020-10-23 19:03:23,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:03:23,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 329 [2020-10-23 19:03:23,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:23,992 INFO L225 Difference]: With dead ends: 164669 [2020-10-23 19:03:23,992 INFO L226 Difference]: Without dead ends: 108965 [2020-10-23 19:03:24,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:03:24,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108965 states. [2020-10-23 19:03:28,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108965 to 108962. [2020-10-23 19:03:28,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108962 states. [2020-10-23 19:03:29,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108962 states to 108962 states and 164964 transitions. [2020-10-23 19:03:29,125 INFO L78 Accepts]: Start accepts. Automaton has 108962 states and 164964 transitions. Word has length 329 [2020-10-23 19:03:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:03:29,125 INFO L481 AbstractCegarLoop]: Abstraction has 108962 states and 164964 transitions. [2020-10-23 19:03:29,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:03:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 108962 states and 164964 transitions. [2020-10-23 19:03:29,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-23 19:03:29,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:03:29,230 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] [2020-10-23 19:03:29,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-23 19:03:29,232 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:03:29,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:03:29,233 INFO L82 PathProgramCache]: Analyzing trace with hash -953910148, now seen corresponding path program 1 times [2020-10-23 19:03:29,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:03:29,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717653295] [2020-10-23 19:03:29,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:03:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:30,731 WARN L193 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:03:30,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:03:30,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:03:31,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:03:31,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717653295] [2020-10-23 19:03:31,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:03:31,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:03:31,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608825014] [2020-10-23 19:03:31,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:03:31,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:03:31,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:03:31,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:03:31,017 INFO L87 Difference]: Start difference. First operand 108962 states and 164964 transitions. Second operand 5 states. [2020-10-23 19:03:43,532 WARN L193 SmtUtils]: Spent 744.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-23 19:03:48,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:03:48,680 INFO L93 Difference]: Finished difference Result 321743 states and 486225 transitions. [2020-10-23 19:03:48,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:03:48,682 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-23 19:03:48,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:03:49,228 INFO L225 Difference]: With dead ends: 321743 [2020-10-23 19:03:49,229 INFO L226 Difference]: Without dead ends: 212902 [2020-10-23 19:03:49,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-23 19:03:49,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212902 states. [2020-10-23 19:03:59,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212902 to 212899. [2020-10-23 19:03:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212899 states. [2020-10-23 19:04:00,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212899 states to 212899 states and 319813 transitions. [2020-10-23 19:04:00,194 INFO L78 Accepts]: Start accepts. Automaton has 212899 states and 319813 transitions. Word has length 331 [2020-10-23 19:04:00,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:00,195 INFO L481 AbstractCegarLoop]: Abstraction has 212899 states and 319813 transitions. [2020-10-23 19:04:00,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:04:00,195 INFO L276 IsEmpty]: Start isEmpty. Operand 212899 states and 319813 transitions. [2020-10-23 19:04:00,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-10-23 19:04:00,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 19:04:00,342 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] [2020-10-23 19:04:00,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-23 19:04:00,342 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 19:04:00,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 19:04:00,342 INFO L82 PathProgramCache]: Analyzing trace with hash -2020014146, now seen corresponding path program 1 times [2020-10-23 19:04:00,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-23 19:04:00,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308956356] [2020-10-23 19:04:00,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 19:04:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:01,703 WARN L193 SmtUtils]: Spent 972.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2020-10-23 19:04:01,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 19:04:01,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 19:04:01,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 19:04:01,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308956356] [2020-10-23 19:04:01,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 19:04:01,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 19:04:01,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70995731] [2020-10-23 19:04:01,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 19:04:01,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-23 19:04:01,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 19:04:01,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 19:04:01,897 INFO L87 Difference]: Start difference. First operand 212899 states and 319813 transitions. Second operand 5 states. [2020-10-23 19:04:20,961 WARN L193 SmtUtils]: Spent 777.00 ms on a formula simplification that was a NOOP. DAG size: 319 [2020-10-23 19:04:29,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 19:04:29,572 INFO L93 Difference]: Finished difference Result 629295 states and 943772 transitions. [2020-10-23 19:04:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-23 19:04:29,573 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 331 [2020-10-23 19:04:29,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 19:04:30,574 INFO L225 Difference]: With dead ends: 629295 [2020-10-23 19:04:30,574 INFO L226 Difference]: Without dead ends: 416630 [2020-10-23 19:04:30,766 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 [2020-10-23 19:04:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416630 states. [2020-10-23 19:04:51,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416630 to 416627. [2020-10-23 19:04:51,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416627 states. [2020-10-23 19:04:52,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416627 states to 416627 states and 621253 transitions. [2020-10-23 19:04:52,409 INFO L78 Accepts]: Start accepts. Automaton has 416627 states and 621253 transitions. Word has length 331 [2020-10-23 19:04:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 19:04:52,409 INFO L481 AbstractCegarLoop]: Abstraction has 416627 states and 621253 transitions. [2020-10-23 19:04:52,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 19:04:52,410 INFO L276 IsEmpty]: Start isEmpty. Operand 416627 states and 621253 transitions.