/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.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 14:13:39,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 14:13:39,350 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 14:13:39,411 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-23 14:13:39,450 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 14:13:39,452 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 14:13:39,454 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 14:13:39,455 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 14:13:39,459 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 14:13:39,460 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 14:13:39,466 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 14:13:39,473 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 14:13:39,475 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 14:13:39,477 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 14:13:39,479 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 14:13:39,481 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 14:13:39,487 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 14:13:39,498 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 14:13:39,499 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 14:13:39,500 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 14:13:39,501 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-02-23 14:13:39,555 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 14:13:39,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 14:13:39,559 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 14:13:39,560 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 14:13:39,560 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 14:13:39,560 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 14:13:39,560 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 14:13:39,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 14:13:39,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 14:13:39,561 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 14:13:39,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 14:13:39,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 14:13:39,563 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 14:13:39,563 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 14:13:39,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 14:13:39,563 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 14:13:39,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 14:13:39,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 14:13:39,564 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 14:13:39,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 14:13:39,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 14:13:39,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 14:13:39,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 14:13:39,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 14:13:39,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 14:13:39,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 14:13:39,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 14:13:39,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 14:13:39,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 14:13:40,008 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 14:13:40,042 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 14:13:40,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 14:13:40,047 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 14:13:40,048 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 14:13:40,049 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-02-23 14:13:40,130 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99624ebae/8f220a6dbf434501a691fed43604e01b/FLAG6cb810d27 [2021-02-23 14:13:40,983 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 14:13:40,987 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-02-23 14:13:41,018 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99624ebae/8f220a6dbf434501a691fed43604e01b/FLAG6cb810d27 [2021-02-23 14:13:41,109 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/99624ebae/8f220a6dbf434501a691fed43604e01b [2021-02-23 14:13:41,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 14:13:41,123 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 14:13:41,127 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 14:13:41,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 14:13:41,132 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 14:13:41,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:13:41" (1/1) ... [2021-02-23 14:13:41,136 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26601250 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:13:41, skipping insertion in model container [2021-02-23 14:13:41,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:13:41" (1/1) ... [2021-02-23 14:13:41,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 14:13:41,276 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 14:13:42,133 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[34819,34832] [2021-02-23 14:13:42,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:13:42,386 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 14:13:42,696 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[34819,34832] [2021-02-23 14:13:42,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:13:42,879 INFO L208 MainTranslator]: Completed translation [2021-02-23 14:13:42,880 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:13:42 WrapperNode [2021-02-23 14:13:42,880 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 14:13:42,881 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 14:13:42,881 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 14:13:42,881 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 14:13:42,896 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:13:42" (1/1) ... [2021-02-23 14:13:42,897 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:13:42" (1/1) ... [2021-02-23 14:13:42,923 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:13:42" (1/1) ... [2021-02-23 14:13:42,923 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:13:42" (1/1) ... [2021-02-23 14:13:42,997 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:13:42" (1/1) ... [2021-02-23 14:13:43,078 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:13:42" (1/1) ... [2021-02-23 14:13:43,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:13:42" (1/1) ... [2021-02-23 14:13:43,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 14:13:43,117 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 14:13:43,118 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 14:13:43,118 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 14:13:43,119 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:13:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 14:13:43,224 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 14:13:43,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 14:13:43,225 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 14:13:43,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 14:13:43,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 14:13:43,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 14:13:43,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 14:13:43,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 14:13:43,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 14:13:43,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-23 14:13:43,227 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 14:13:43,228 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-23 14:13:43,229 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 14:13:43,229 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-23 14:13:43,231 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-23 14:13:43,231 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-23 14:13:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-23 14:13:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-23 14:13:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-23 14:13:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-23 14:13:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-23 14:13:43,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 14:13:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 14:13:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 14:13:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 14:13:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 14:13:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 14:13:43,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 14:13:45,922 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 14:13:45,922 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 14:13:45,926 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:13:45 BoogieIcfgContainer [2021-02-23 14:13:45,926 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 14:13:45,928 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 14:13:45,928 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 14:13:45,932 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 14:13:45,932 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 02:13:41" (1/3) ... [2021-02-23 14:13:45,933 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fa8a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:13:45, skipping insertion in model container [2021-02-23 14:13:45,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:13:42" (2/3) ... [2021-02-23 14:13:45,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23fa8a95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:13:45, skipping insertion in model container [2021-02-23 14:13:45,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:13:45" (3/3) ... [2021-02-23 14:13:45,936 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2021-02-23 14:13:45,943 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 14:13:45,949 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 14:13:45,968 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 14:13:46,017 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 14:13:46,017 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 14:13:46,018 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 14:13:46,018 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 14:13:46,018 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 14:13:46,018 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 14:13:46,018 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 14:13:46,018 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 14:13:46,052 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states. [2021-02-23 14:13:46,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-23 14:13:46,087 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:46,089 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] [2021-02-23 14:13:46,089 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:46,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:46,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1870510118, now seen corresponding path program 1 times [2021-02-23 14:13:46,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:46,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407850169] [2021-02-23 14:13:46,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:47,217 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:47,219 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:47,221 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:47,224 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:13:47,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:47,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:48,030 WARN L202 SmtUtils]: Spent 763.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-23 14:13:48,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:48,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:48,056 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:48,056 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:13:48,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407850169] [2021-02-23 14:13:48,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:48,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:48,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944327620] [2021-02-23 14:13:48,285 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:48,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:48,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:48,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:48,318 INFO L87 Difference]: Start difference. First operand 795 states. Second operand 4 states. [2021-02-23 14:13:49,278 WARN L202 SmtUtils]: Spent 855.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2021-02-23 14:13:54,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:54,583 INFO L93 Difference]: Finished difference Result 1490 states and 2621 transitions. [2021-02-23 14:13:54,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:13:54,585 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2021-02-23 14:13:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:54,611 INFO L225 Difference]: With dead ends: 1490 [2021-02-23 14:13:54,611 INFO L226 Difference]: Without dead ends: 1284 [2021-02-23 14:13:54,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:13:54,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-02-23 14:13:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 1282. [2021-02-23 14:13:54,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1282 states. [2021-02-23 14:13:54,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1282 states to 1282 states and 2005 transitions. [2021-02-23 14:13:54,763 INFO L78 Accepts]: Start accepts. Automaton has 1282 states and 2005 transitions. Word has length 324 [2021-02-23 14:13:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:54,765 INFO L480 AbstractCegarLoop]: Abstraction has 1282 states and 2005 transitions. [2021-02-23 14:13:54,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:54,765 INFO L276 IsEmpty]: Start isEmpty. Operand 1282 states and 2005 transitions. [2021-02-23 14:13:54,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-23 14:13:54,775 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:54,776 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] [2021-02-23 14:13:54,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 14:13:54,776 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:54,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:54,801 INFO L82 PathProgramCache]: Analyzing trace with hash -127429012, now seen corresponding path program 1 times [2021-02-23 14:13:54,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:54,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935847674] [2021-02-23 14:13:54,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:54,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:55,085 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:55,085 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:55,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:55,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:13:55,096 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:55,096 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:55,957 WARN L202 SmtUtils]: Spent 842.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-23 14:13:55,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:55,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:55,977 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:55,978 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:13:56,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935847674] [2021-02-23 14:13:56,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:56,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:56,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435036838] [2021-02-23 14:13:56,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:56,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:56,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:56,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:56,182 INFO L87 Difference]: Start difference. First operand 1282 states and 2005 transitions. Second operand 4 states. [2021-02-23 14:13:56,914 WARN L202 SmtUtils]: Spent 681.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2021-02-23 14:14:01,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:01,432 INFO L93 Difference]: Finished difference Result 2612 states and 4118 transitions. [2021-02-23 14:14:01,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:01,436 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2021-02-23 14:14:01,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:01,456 INFO L225 Difference]: With dead ends: 2612 [2021-02-23 14:14:01,458 INFO L226 Difference]: Without dead ends: 2248 [2021-02-23 14:14:01,472 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 [2021-02-23 14:14:01,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2248 states. [2021-02-23 14:14:01,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2248 to 2246. [2021-02-23 14:14:01,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2246 states. [2021-02-23 14:14:01,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2246 states to 2246 states and 3507 transitions. [2021-02-23 14:14:01,606 INFO L78 Accepts]: Start accepts. Automaton has 2246 states and 3507 transitions. Word has length 324 [2021-02-23 14:14:01,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:01,608 INFO L480 AbstractCegarLoop]: Abstraction has 2246 states and 3507 transitions. [2021-02-23 14:14:01,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:14:01,608 INFO L276 IsEmpty]: Start isEmpty. Operand 2246 states and 3507 transitions. [2021-02-23 14:14:01,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-23 14:14:01,622 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:01,622 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] [2021-02-23 14:14:01,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 14:14:01,623 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:01,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:01,624 INFO L82 PathProgramCache]: Analyzing trace with hash -941789149, now seen corresponding path program 1 times [2021-02-23 14:14:01,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:01,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342373541] [2021-02-23 14:14:01,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:01,926 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:01,927 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:01,928 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:01,929 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:14:01,932 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:01,933 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:02,554 WARN L202 SmtUtils]: Spent 607.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-23 14:14:02,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:02,575 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:02,576 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:02,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:14:02,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342373541] [2021-02-23 14:14:02,746 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:02,746 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:14:02,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673570143] [2021-02-23 14:14:02,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:14:02,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:02,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:14:02,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:02,748 INFO L87 Difference]: Start difference. First operand 2246 states and 3507 transitions. Second operand 4 states. [2021-02-23 14:14:03,434 WARN L202 SmtUtils]: Spent 639.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2021-02-23 14:14:07,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:07,737 INFO L93 Difference]: Finished difference Result 4822 states and 7593 transitions. [2021-02-23 14:14:07,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:07,738 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2021-02-23 14:14:07,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:07,759 INFO L225 Difference]: With dead ends: 4822 [2021-02-23 14:14:07,759 INFO L226 Difference]: Without dead ends: 4140 [2021-02-23 14:14:07,762 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:14:07,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2021-02-23 14:14:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 4138. [2021-02-23 14:14:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4138 states. [2021-02-23 14:14:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 6447 transitions. [2021-02-23 14:14:07,915 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 6447 transitions. Word has length 324 [2021-02-23 14:14:07,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:07,916 INFO L480 AbstractCegarLoop]: Abstraction has 4138 states and 6447 transitions. [2021-02-23 14:14:07,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:14:07,916 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 6447 transitions. [2021-02-23 14:14:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-23 14:14:07,926 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:07,927 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] [2021-02-23 14:14:07,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 14:14:07,927 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:07,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:07,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1072121675, now seen corresponding path program 1 times [2021-02-23 14:14:07,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:07,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721590644] [2021-02-23 14:14:07,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:08,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:08,155 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:08,156 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:08,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:08,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:14:08,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:08,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:08,860 WARN L202 SmtUtils]: Spent 682.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-23 14:14:08,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:08,880 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:08,881 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:09,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:14:09,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721590644] [2021-02-23 14:14:09,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:09,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:14:09,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499173558] [2021-02-23 14:14:09,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:14:09,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:09,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:14:09,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:09,047 INFO L87 Difference]: Start difference. First operand 4138 states and 6447 transitions. Second operand 4 states. [2021-02-23 14:14:09,810 WARN L202 SmtUtils]: Spent 722.00 ms on a formula simplification that was a NOOP. DAG size: 314 [2021-02-23 14:14:14,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:14,084 INFO L93 Difference]: Finished difference Result 9126 states and 14341 transitions. [2021-02-23 14:14:14,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:14,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2021-02-23 14:14:14,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:14,124 INFO L225 Difference]: With dead ends: 9126 [2021-02-23 14:14:14,125 INFO L226 Difference]: Without dead ends: 7852 [2021-02-23 14:14:14,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:14:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7852 states. [2021-02-23 14:14:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7852 to 7850. [2021-02-23 14:14:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7850 states. [2021-02-23 14:14:14,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7850 states to 7850 states and 12199 transitions. [2021-02-23 14:14:14,380 INFO L78 Accepts]: Start accepts. Automaton has 7850 states and 12199 transitions. Word has length 324 [2021-02-23 14:14:14,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:14,381 INFO L480 AbstractCegarLoop]: Abstraction has 7850 states and 12199 transitions. [2021-02-23 14:14:14,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:14:14,381 INFO L276 IsEmpty]: Start isEmpty. Operand 7850 states and 12199 transitions. [2021-02-23 14:14:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2021-02-23 14:14:14,403 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:14,404 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] [2021-02-23 14:14:14,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 14:14:14,404 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:14,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:14,405 INFO L82 PathProgramCache]: Analyzing trace with hash -247456284, now seen corresponding path program 1 times [2021-02-23 14:14:14,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:14,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622101246] [2021-02-23 14:14:14,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:15,091 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:15,092 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:15,093 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:15,094 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:14:15,104 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:15,105 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:14:15,116 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:15,117 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:15,875 WARN L202 SmtUtils]: Spent 739.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-23 14:14:15,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:15,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:15,909 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:15,910 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:16,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:14:16,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622101246] [2021-02-23 14:14:16,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:16,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:14:16,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130017593] [2021-02-23 14:14:16,083 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:14:16,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:16,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:14:16,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:14:16,084 INFO L87 Difference]: Start difference. First operand 7850 states and 12199 transitions. Second operand 5 states. [2021-02-23 14:14:23,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:23,573 INFO L93 Difference]: Finished difference Result 23223 states and 36054 transitions. [2021-02-23 14:14:23,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:23,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 324 [2021-02-23 14:14:23,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:23,637 INFO L225 Difference]: With dead ends: 23223 [2021-02-23 14:14:23,637 INFO L226 Difference]: Without dead ends: 15388 [2021-02-23 14:14:23,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15388 states. [2021-02-23 14:14:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15388 to 15386. [2021-02-23 14:14:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15386 states. [2021-02-23 14:14:24,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15386 states to 15386 states and 23772 transitions. [2021-02-23 14:14:24,282 INFO L78 Accepts]: Start accepts. Automaton has 15386 states and 23772 transitions. Word has length 324 [2021-02-23 14:14:24,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:24,282 INFO L480 AbstractCegarLoop]: Abstraction has 15386 states and 23772 transitions. [2021-02-23 14:14:24,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 14:14:24,282 INFO L276 IsEmpty]: Start isEmpty. Operand 15386 states and 23772 transitions. [2021-02-23 14:14:24,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-23 14:14:24,313 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:24,313 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] [2021-02-23 14:14:24,314 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 14:14:24,314 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:24,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:24,315 INFO L82 PathProgramCache]: Analyzing trace with hash -41876105, now seen corresponding path program 1 times [2021-02-23 14:14:24,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:24,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438516238] [2021-02-23 14:14:24,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:24,475 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:24,475 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:24,476 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:24,477 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:14:24,481 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:24,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:25,216 WARN L202 SmtUtils]: Spent 719.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-23 14:14:25,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:25,236 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:25,237 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:25,503 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:14:25,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438516238] [2021-02-23 14:14:25,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:25,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:14:25,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950514227] [2021-02-23 14:14:25,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:14:25,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:25,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:14:25,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:25,506 INFO L87 Difference]: Start difference. First operand 15386 states and 23772 transitions. Second operand 4 states. [2021-02-23 14:14:34,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:34,426 INFO L93 Difference]: Finished difference Result 45419 states and 70072 transitions. [2021-02-23 14:14:34,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:14:34,427 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2021-02-23 14:14:34,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:34,497 INFO L225 Difference]: With dead ends: 45419 [2021-02-23 14:14:34,497 INFO L226 Difference]: Without dead ends: 30162 [2021-02-23 14:14:34,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:34,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30162 states. [2021-02-23 14:14:35,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30162 to 30160. [2021-02-23 14:14:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30160 states. [2021-02-23 14:14:35,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30160 states to 30160 states and 46321 transitions. [2021-02-23 14:14:35,633 INFO L78 Accepts]: Start accepts. Automaton has 30160 states and 46321 transitions. Word has length 326 [2021-02-23 14:14:35,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:35,633 INFO L480 AbstractCegarLoop]: Abstraction has 30160 states and 46321 transitions. [2021-02-23 14:14:35,633 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:14:35,633 INFO L276 IsEmpty]: Start isEmpty. Operand 30160 states and 46321 transitions. [2021-02-23 14:14:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2021-02-23 14:14:35,686 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:35,687 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] [2021-02-23 14:14:35,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 14:14:35,687 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:35,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:35,688 INFO L82 PathProgramCache]: Analyzing trace with hash -2104012548, now seen corresponding path program 1 times [2021-02-23 14:14:35,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:35,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197204426] [2021-02-23 14:14:35,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:35,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:35,801 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:35,801 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:35,802 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:35,803 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:14:35,807 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:35,808 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:36,663 WARN L202 SmtUtils]: Spent 841.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-23 14:14:36,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:36,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:36,686 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:36,687 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:14:36,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197204426] [2021-02-23 14:14:36,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:36,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:14:36,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932100542] [2021-02-23 14:14:36,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:14:36,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:36,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:14:36,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:36,853 INFO L87 Difference]: Start difference. First operand 30160 states and 46321 transitions. Second operand 4 states. [2021-02-23 14:14:46,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:46,503 INFO L93 Difference]: Finished difference Result 90405 states and 138839 transitions. [2021-02-23 14:14:46,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:14:46,504 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 326 [2021-02-23 14:14:46,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:46,656 INFO L225 Difference]: With dead ends: 90405 [2021-02-23 14:14:46,656 INFO L226 Difference]: Without dead ends: 60287 [2021-02-23 14:14:46,731 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 [2021-02-23 14:14:46,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60287 states. [2021-02-23 14:14:48,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60287 to 30179. [2021-02-23 14:14:48,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30179 states. [2021-02-23 14:14:48,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30179 states to 30179 states and 46349 transitions. [2021-02-23 14:14:48,260 INFO L78 Accepts]: Start accepts. Automaton has 30179 states and 46349 transitions. Word has length 326 [2021-02-23 14:14:48,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:48,261 INFO L480 AbstractCegarLoop]: Abstraction has 30179 states and 46349 transitions. [2021-02-23 14:14:48,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:14:48,261 INFO L276 IsEmpty]: Start isEmpty. Operand 30179 states and 46349 transitions. [2021-02-23 14:14:48,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2021-02-23 14:14:48,308 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:48,308 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] [2021-02-23 14:14:48,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 14:14:48,309 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:48,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:48,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1504278854, now seen corresponding path program 1 times [2021-02-23 14:14:48,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:48,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162362534] [2021-02-23 14:14:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:48,423 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:48,424 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:48,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:48,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:14:48,436 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:48,437 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:49,214 WARN L202 SmtUtils]: Spent 762.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-23 14:14:49,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:49,237 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:49,238 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:49,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:14:49,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162362534] [2021-02-23 14:14:49,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:49,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:14:49,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238657226] [2021-02-23 14:14:49,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:14:49,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:49,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:14:49,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:49,513 INFO L87 Difference]: Start difference. First operand 30179 states and 46349 transitions. Second operand 4 states. [2021-02-23 14:14:59,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:59,927 INFO L93 Difference]: Finished difference Result 90424 states and 138860 transitions. [2021-02-23 14:14:59,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:14:59,929 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 327 [2021-02-23 14:14:59,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:15:00,022 INFO L225 Difference]: With dead ends: 90424 [2021-02-23 14:15:00,022 INFO L226 Difference]: Without dead ends: 60305 [2021-02-23 14:15:00,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:15:00,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60305 states. [2021-02-23 14:15:01,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60305 to 30197. [2021-02-23 14:15:01,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30197 states. [2021-02-23 14:15:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30197 states to 30197 states and 46370 transitions. [2021-02-23 14:15:01,607 INFO L78 Accepts]: Start accepts. Automaton has 30197 states and 46370 transitions. Word has length 327 [2021-02-23 14:15:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:15:01,607 INFO L480 AbstractCegarLoop]: Abstraction has 30197 states and 46370 transitions. [2021-02-23 14:15:01,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:15:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 30197 states and 46370 transitions. [2021-02-23 14:15:01,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-02-23 14:15:01,632 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:15:01,633 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] [2021-02-23 14:15:01,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 14:15:01,633 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:15:01,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:15:01,634 INFO L82 PathProgramCache]: Analyzing trace with hash -247696078, now seen corresponding path program 1 times [2021-02-23 14:15:01,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:15:01,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112820200] [2021-02-23 14:15:01,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:15:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:01,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:01,841 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:01,842 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:01,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:15:01,846 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:01,847 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:02,533 WARN L202 SmtUtils]: Spent 671.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-23 14:15:02,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:15:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:02,553 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:02,553 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:02,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:15:02,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112820200] [2021-02-23 14:15:02,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:15:02,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:15:02,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639257133] [2021-02-23 14:15:02,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:15:02,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:15:02,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:15:02,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:15:02,699 INFO L87 Difference]: Start difference. First operand 30197 states and 46370 transitions. Second operand 4 states. [2021-02-23 14:15:13,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:15:13,228 INFO L93 Difference]: Finished difference Result 85716 states and 131393 transitions. [2021-02-23 14:15:13,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:15:13,229 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 328 [2021-02-23 14:15:13,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:15:13,285 INFO L225 Difference]: With dead ends: 85716 [2021-02-23 14:15:13,285 INFO L226 Difference]: Without dead ends: 55764 [2021-02-23 14:15:13,310 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 [2021-02-23 14:15:13,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55764 states. [2021-02-23 14:15:15,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55764 to 55762. [2021-02-23 14:15:15,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55762 states. [2021-02-23 14:15:15,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55762 states to 55762 states and 85028 transitions. [2021-02-23 14:15:15,470 INFO L78 Accepts]: Start accepts. Automaton has 55762 states and 85028 transitions. Word has length 328 [2021-02-23 14:15:15,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:15:15,471 INFO L480 AbstractCegarLoop]: Abstraction has 55762 states and 85028 transitions. [2021-02-23 14:15:15,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:15:15,478 INFO L276 IsEmpty]: Start isEmpty. Operand 55762 states and 85028 transitions. [2021-02-23 14:15:15,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-02-23 14:15:15,527 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:15:15,528 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] [2021-02-23 14:15:15,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 14:15:15,528 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:15:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:15:15,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1558324239, now seen corresponding path program 1 times [2021-02-23 14:15:15,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:15:15,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7722144] [2021-02-23 14:15:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:15:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:15,992 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:15,993 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:15,994 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:15,994 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:15:16,001 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-23 14:15:16,002 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-23 14:15:16,019 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:16,020 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:15:16,036 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:16,037 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:16,708 WARN L202 SmtUtils]: Spent 650.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-23 14:15:16,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:15:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:16,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:16,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:16,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:15:16,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7722144] [2021-02-23 14:15:16,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:15:16,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:15:16,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940472491] [2021-02-23 14:15:16,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:15:16,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:15:16,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:15:16,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:15:16,856 INFO L87 Difference]: Start difference. First operand 55762 states and 85028 transitions. Second operand 6 states. [2021-02-23 14:15:27,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:15:27,868 INFO L93 Difference]: Finished difference Result 164666 states and 250697 transitions. [2021-02-23 14:15:27,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:15:27,869 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 328 [2021-02-23 14:15:27,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:15:28,025 INFO L225 Difference]: With dead ends: 164666 [2021-02-23 14:15:28,025 INFO L226 Difference]: Without dead ends: 108963 [2021-02-23 14:15:28,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:15:28,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108963 states. [2021-02-23 14:15:32,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108963 to 108961. [2021-02-23 14:15:32,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108961 states. [2021-02-23 14:15:32,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108961 states to 108961 states and 164963 transitions. [2021-02-23 14:15:32,778 INFO L78 Accepts]: Start accepts. Automaton has 108961 states and 164963 transitions. Word has length 328 [2021-02-23 14:15:32,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:15:32,778 INFO L480 AbstractCegarLoop]: Abstraction has 108961 states and 164963 transitions. [2021-02-23 14:15:32,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:15:32,779 INFO L276 IsEmpty]: Start isEmpty. Operand 108961 states and 164963 transitions. [2021-02-23 14:15:32,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-23 14:15:32,904 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:15:32,905 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, 1, 1, 1, 1, 1] [2021-02-23 14:15:32,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 14:15:32,905 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:15:32,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:15:32,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1621319205, now seen corresponding path program 1 times [2021-02-23 14:15:32,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:15:32,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915632996] [2021-02-23 14:15:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:15:33,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:33,479 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:33,482 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:33,483 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:33,484 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:15:33,490 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-23 14:15:33,492 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-23 14:15:33,512 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:33,513 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:15:33,525 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:33,526 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:34,227 WARN L202 SmtUtils]: Spent 679.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-23 14:15:34,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:15:34,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:34,244 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:34,245 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:34,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:15:34,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915632996] [2021-02-23 14:15:34,435 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:15:34,435 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:15:34,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37440338] [2021-02-23 14:15:34,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:15:34,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:15:34,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:15:34,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:15:34,437 INFO L87 Difference]: Start difference. First operand 108961 states and 164963 transitions. Second operand 6 states. [2021-02-23 14:15:49,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:15:49,942 INFO L93 Difference]: Finished difference Result 321740 states and 486222 transitions. [2021-02-23 14:15:49,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:15:49,943 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 330 [2021-02-23 14:15:49,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:15:50,255 INFO L225 Difference]: With dead ends: 321740 [2021-02-23 14:15:50,255 INFO L226 Difference]: Without dead ends: 212900 [2021-02-23 14:15:50,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:15:50,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212900 states. [2021-02-23 14:15:59,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212900 to 212898. [2021-02-23 14:15:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212898 states. [2021-02-23 14:16:00,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212898 states to 212898 states and 319812 transitions. [2021-02-23 14:16:00,429 INFO L78 Accepts]: Start accepts. Automaton has 212898 states and 319812 transitions. Word has length 330 [2021-02-23 14:16:00,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:16:00,430 INFO L480 AbstractCegarLoop]: Abstraction has 212898 states and 319812 transitions. [2021-02-23 14:16:00,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:16:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 212898 states and 319812 transitions. [2021-02-23 14:16:00,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-02-23 14:16:00,992 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:16:00,993 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] [2021-02-23 14:16:00,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 14:16:00,993 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:16:00,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:16:00,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1045470557, now seen corresponding path program 1 times [2021-02-23 14:16:00,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:16:00,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237098369] [2021-02-23 14:16:00,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:16:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:01,425 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:01,426 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:01,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:01,427 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:16:01,435 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:01,439 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:16:01,450 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:01,453 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:02,255 WARN L202 SmtUtils]: Spent 782.00 ms on a formula simplification that was a NOOP. DAG size: 313 [2021-02-23 14:16:02,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:16:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:02,272 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:02,273 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:02,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-23 14:16:02,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237098369] [2021-02-23 14:16:02,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:16:02,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:16:02,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288015118] [2021-02-23 14:16:02,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:16:02,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:16:02,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:16:02,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:16:02,570 INFO L87 Difference]: Start difference. First operand 212898 states and 319812 transitions. Second operand 5 states. [2021-02-23 14:16:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:16:26,533 INFO L93 Difference]: Finished difference Result 629292 states and 943769 transitions. [2021-02-23 14:16:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:16:26,534 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 330 [2021-02-23 14:16:26,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:16:27,667 INFO L225 Difference]: With dead ends: 629292 [2021-02-23 14:16:27,668 INFO L226 Difference]: Without dead ends: 416628 [2021-02-23 14:16:27,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:16:28,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416628 states. [2021-02-23 14:16:47,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416628 to 416626. [2021-02-23 14:16:47,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416626 states. [2021-02-23 14:16:48,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416626 states to 416626 states and 621252 transitions. [2021-02-23 14:16:48,558 INFO L78 Accepts]: Start accepts. Automaton has 416626 states and 621252 transitions. Word has length 330 [2021-02-23 14:16:48,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:16:48,558 INFO L480 AbstractCegarLoop]: Abstraction has 416626 states and 621252 transitions. [2021-02-23 14:16:48,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 14:16:48,559 INFO L276 IsEmpty]: Start isEmpty. Operand 416626 states and 621252 transitions. [2021-02-23 14:16:48,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2021-02-23 14:16:48,916 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:16:48,917 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] [2021-02-23 14:16:48,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-23 14:16:48,917 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:16:48,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:16:48,918 INFO L82 PathProgramCache]: Analyzing trace with hash 146928749, now seen corresponding path program 1 times [2021-02-23 14:16:48,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:16:48,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454352193] [2021-02-23 14:16:48,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:16:48,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:16:49,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:49,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:16:49,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:49,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:16:49,620 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:16:49,620 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1