/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_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-36cd7be [2021-02-23 14:10:57,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-23 14:10:57,506 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-23 14:10:57,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-23 14:10:57,560 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-23 14:10:57,564 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-23 14:10:57,568 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-23 14:10:57,576 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-23 14:10:57,579 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-23 14:10:57,587 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-23 14:10:57,589 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-23 14:10:57,591 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-23 14:10:57,591 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-23 14:10:57,594 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-23 14:10:57,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-23 14:10:57,598 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-23 14:10:57,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-23 14:10:57,615 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-23 14:10:57,622 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-23 14:10:57,630 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-23 14:10:57,632 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-23 14:10:57,635 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-23 14:10:57,636 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-23 14:10:57,639 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-23 14:10:57,648 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-23 14:10:57,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-23 14:10:57,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-23 14:10:57,662 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-23 14:10:57,663 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 14:10:57,719 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-23 14:10:57,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-23 14:10:57,724 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-23 14:10:57,725 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-23 14:10:57,725 INFO L138 SettingsManager]: * Use SBE=true [2021-02-23 14:10:57,725 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-23 14:10:57,726 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-23 14:10:57,726 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-23 14:10:57,726 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-23 14:10:57,726 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-23 14:10:57,728 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-23 14:10:57,728 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-23 14:10:57,728 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-23 14:10:57,728 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-23 14:10:57,729 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-23 14:10:57,729 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-23 14:10:57,729 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-23 14:10:57,729 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-23 14:10:57,730 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-23 14:10:57,730 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-23 14:10:57,730 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-23 14:10:57,731 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-23 14:10:57,731 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-23 14:10:57,731 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-23 14:10:57,731 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-23 14:10:57,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-23 14:10:57,732 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-23 14:10:57,732 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-23 14:10:57,732 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-23 14:10:58,138 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-23 14:10:58,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-23 14:10:58,168 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-23 14:10:58,171 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-23 14:10:58,172 INFO L275 PluginConnector]: CDTParser initialized [2021-02-23 14:10:58,173 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 14:10:58,272 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1b07c09e/d69032f217dd41c6811b4574b5f49332/FLAG617bd968d [2021-02-23 14:10:59,170 INFO L306 CDTParser]: Found 1 translation units. [2021-02-23 14:10:59,170 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 14:10:59,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1b07c09e/d69032f217dd41c6811b4574b5f49332/FLAG617bd968d [2021-02-23 14:10:59,262 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e1b07c09e/d69032f217dd41c6811b4574b5f49332 [2021-02-23 14:10:59,265 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-23 14:10:59,280 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-23 14:10:59,282 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-23 14:10:59,282 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-23 14:10:59,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-23 14:10:59,288 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:10:59" (1/1) ... [2021-02-23 14:10:59,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@8f05fc7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:10:59, skipping insertion in model container [2021-02-23 14:10:59,291 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.02 02:10:59" (1/1) ... [2021-02-23 14:10:59,299 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-23 14:10:59,484 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-23 14:11:00,572 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_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[49803,49816] [2021-02-23 14:11:00,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:11:00,944 INFO L203 MainTranslator]: Completed pre-run [2021-02-23 14:11:01,729 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_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[49803,49816] [2021-02-23 14:11:02,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-23 14:11:02,089 INFO L208 MainTranslator]: Completed translation [2021-02-23 14:11:02,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:02 WrapperNode [2021-02-23 14:11:02,089 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-23 14:11:02,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-23 14:11:02,091 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-23 14:11:02,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-23 14:11:02,106 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:02" (1/1) ... [2021-02-23 14:11:02,106 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:02" (1/1) ... [2021-02-23 14:11:02,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:02" (1/1) ... [2021-02-23 14:11:02,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:02" (1/1) ... [2021-02-23 14:11:02,248 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:02" (1/1) ... [2021-02-23 14:11:02,292 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:02" (1/1) ... [2021-02-23 14:11:02,309 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:02" (1/1) ... [2021-02-23 14:11:02,339 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-23 14:11:02,341 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-23 14:11:02,342 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-23 14:11:02,342 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-23 14:11:02,343 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:02" (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 14:11:02,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-23 14:11:02,451 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-23 14:11:02,452 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-23 14:11:02,452 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-23 14:11:02,453 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-23 14:11:02,453 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-23 14:11:02,453 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-23 14:11:02,453 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-23 14:11:02,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-23 14:11:02,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-23 14:11:02,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-23 14:11:02,454 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-23 14:11:02,455 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-23 14:11:02,456 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-23 14:11:02,458 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-23 14:11:02,458 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-23 14:11:02,458 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-23 14:11:02,459 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-23 14:11:02,459 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-23 14:11:02,459 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-23 14:11:02,459 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2021-02-23 14:11:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-23 14:11:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-23 14:11:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-23 14:11:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-23 14:11:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-23 14:11:02,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-23 14:11:02,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-23 14:11:02,461 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-23 14:11:02,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-23 14:11:06,540 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-23 14:11:06,540 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-23 14:11:06,544 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:11:06 BoogieIcfgContainer [2021-02-23 14:11:06,545 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-23 14:11:06,547 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-23 14:11:06,547 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-23 14:11:06,551 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-23 14:11:06,551 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.02 02:10:59" (1/3) ... [2021-02-23 14:11:06,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e89890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:11:06, skipping insertion in model container [2021-02-23 14:11:06,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.02 02:11:02" (2/3) ... [2021-02-23 14:11:06,552 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75e89890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.02 02:11:06, skipping insertion in model container [2021-02-23 14:11:06,552 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.02 02:11:06" (3/3) ... [2021-02-23 14:11:06,554 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-23 14:11:06,561 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-23 14:11:06,567 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-23 14:11:06,587 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-23 14:11:06,621 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-23 14:11:06,621 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-23 14:11:06,621 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-23 14:11:06,622 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-23 14:11:06,622 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-23 14:11:06,622 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-23 14:11:06,622 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-23 14:11:06,622 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-23 14:11:06,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1340 states. [2021-02-23 14:11:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-02-23 14:11:06,709 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:11:06,711 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:11:06,711 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:11:06,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:11:06,718 INFO L82 PathProgramCache]: Analyzing trace with hash -562309937, now seen corresponding path program 1 times [2021-02-23 14:11:06,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:11:06,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961919307] [2021-02-23 14:11:06,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:11:07,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:11:08,157 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:08,158 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:08,159 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:08,161 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-23 14:11:08,172 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:08,173 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:09,364 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 412 [2021-02-23 14:11:09,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:11:09,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:11:09,399 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:09,400 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:09,777 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 14:11:09,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961919307] [2021-02-23 14:11:09,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:11:09,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:11:09,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061122764] [2021-02-23 14:11:09,786 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:11:09,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:11:09,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:11:09,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:11:09,804 INFO L87 Difference]: Start difference. First operand 1340 states. Second operand 4 states. [2021-02-23 14:11:10,987 WARN L202 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 413 [2021-02-23 14:11:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:11:21,225 INFO L93 Difference]: Finished difference Result 2262 states and 4032 transitions. [2021-02-23 14:11:21,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:11:21,227 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 476 [2021-02-23 14:11:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:11:21,278 INFO L225 Difference]: With dead ends: 2262 [2021-02-23 14:11:21,278 INFO L226 Difference]: Without dead ends: 1993 [2021-02-23 14:11:21,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:11:21,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1993 states. [2021-02-23 14:11:21,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1993 to 1991. [2021-02-23 14:11:21,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1991 states. [2021-02-23 14:11:21,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1991 states to 1991 states and 3230 transitions. [2021-02-23 14:11:21,529 INFO L78 Accepts]: Start accepts. Automaton has 1991 states and 3230 transitions. Word has length 476 [2021-02-23 14:11:21,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:11:21,534 INFO L480 AbstractCegarLoop]: Abstraction has 1991 states and 3230 transitions. [2021-02-23 14:11:21,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:11:21,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1991 states and 3230 transitions. [2021-02-23 14:11:21,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2021-02-23 14:11:21,557 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:11:21,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:11:21,559 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-23 14:11:21,559 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:11:21,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:11:21,560 INFO L82 PathProgramCache]: Analyzing trace with hash 472548733, now seen corresponding path program 1 times [2021-02-23 14:11:21,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:11:21,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698772596] [2021-02-23 14:11:21,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:11:22,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:11:22,825 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:22,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:22,828 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:22,828 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:11:22,840 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:22,842 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:11:22,858 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:22,859 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:24,126 WARN L202 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 412 [2021-02-23 14:11:24,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:11:24,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:11:24,163 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:24,164 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:24,532 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 14:11:24,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698772596] [2021-02-23 14:11:24,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:11:24,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:11:24,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687599946] [2021-02-23 14:11:24,535 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:11:24,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:11:24,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:11:24,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:11:24,537 INFO L87 Difference]: Start difference. First operand 1991 states and 3230 transitions. Second operand 5 states. [2021-02-23 14:11:39,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:11:39,167 INFO L93 Difference]: Finished difference Result 5904 states and 9579 transitions. [2021-02-23 14:11:39,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:11:39,179 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 476 [2021-02-23 14:11:39,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:11:39,205 INFO L225 Difference]: With dead ends: 5904 [2021-02-23 14:11:39,206 INFO L226 Difference]: Without dead ends: 3930 [2021-02-23 14:11:39,215 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:11:39,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3930 states. [2021-02-23 14:11:39,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3930 to 3928. [2021-02-23 14:11:39,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3928 states. [2021-02-23 14:11:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 6348 transitions. [2021-02-23 14:11:39,446 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 6348 transitions. Word has length 476 [2021-02-23 14:11:39,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:11:39,447 INFO L480 AbstractCegarLoop]: Abstraction has 3928 states and 6348 transitions. [2021-02-23 14:11:39,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 14:11:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 6348 transitions. [2021-02-23 14:11:39,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 479 [2021-02-23 14:11:39,458 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:11:39,460 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:11:39,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-23 14:11:39,460 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:11:39,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:11:39,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1651060630, now seen corresponding path program 1 times [2021-02-23 14:11:39,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:11:39,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027410487] [2021-02-23 14:11:39,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:11:39,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:11:39,824 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:39,825 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:39,826 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:39,826 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:11:39,831 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:39,831 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:40,872 WARN L202 SmtUtils]: Spent 1.02 s on a formula simplification that was a NOOP. DAG size: 412 [2021-02-23 14:11:40,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:11:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:11:40,902 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:40,903 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:41,268 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 14:11:41,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027410487] [2021-02-23 14:11:41,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:11:41,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:11:41,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130406712] [2021-02-23 14:11:41,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:11:41,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:11:41,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:11:41,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:11:41,271 INFO L87 Difference]: Start difference. First operand 3928 states and 6348 transitions. Second operand 4 states. [2021-02-23 14:11:58,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:11:58,090 INFO L93 Difference]: Finished difference Result 11482 states and 18513 transitions. [2021-02-23 14:11:58,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:11:58,091 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 478 [2021-02-23 14:11:58,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:11:58,125 INFO L225 Difference]: With dead ends: 11482 [2021-02-23 14:11:58,125 INFO L226 Difference]: Without dead ends: 7768 [2021-02-23 14:11:58,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:11:58,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7768 states. [2021-02-23 14:11:58,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7768 to 7766. [2021-02-23 14:11:58,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7766 states. [2021-02-23 14:11:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7766 states to 7766 states and 12509 transitions. [2021-02-23 14:11:58,434 INFO L78 Accepts]: Start accepts. Automaton has 7766 states and 12509 transitions. Word has length 478 [2021-02-23 14:11:58,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:11:58,434 INFO L480 AbstractCegarLoop]: Abstraction has 7766 states and 12509 transitions. [2021-02-23 14:11:58,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:11:58,435 INFO L276 IsEmpty]: Start isEmpty. Operand 7766 states and 12509 transitions. [2021-02-23 14:11:58,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 480 [2021-02-23 14:11:58,453 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:11:58,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:11:58,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-23 14:11:58,454 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:11:58,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:11:58,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1641715888, now seen corresponding path program 1 times [2021-02-23 14:11:58,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:11:58,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018372989] [2021-02-23 14:11:58,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:11:58,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:11:58,650 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:58,651 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:58,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:58,653 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:11:58,657 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:58,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:11:59,793 WARN L202 SmtUtils]: Spent 1.12 s on a formula simplification that was a NOOP. DAG size: 412 [2021-02-23 14:11:59,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:11:59,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:11:59,815 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:11:59,816 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:00,023 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 14:12:00,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018372989] [2021-02-23 14:12:00,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:00,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:00,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485355842] [2021-02-23 14:12:00,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:00,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:00,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:00,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:00,026 INFO L87 Difference]: Start difference. First operand 7766 states and 12509 transitions. Second operand 4 states. [2021-02-23 14:12:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:17,833 INFO L93 Difference]: Finished difference Result 23201 states and 37359 transitions. [2021-02-23 14:12:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:12:17,834 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 479 [2021-02-23 14:12:17,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:17,895 INFO L225 Difference]: With dead ends: 23201 [2021-02-23 14:12:17,895 INFO L226 Difference]: Without dead ends: 15487 [2021-02-23 14:12:17,913 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:17,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15487 states. [2021-02-23 14:12:18,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15487 to 7813. [2021-02-23 14:12:18,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7813 states. [2021-02-23 14:12:18,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7813 states to 7813 states and 12583 transitions. [2021-02-23 14:12:18,409 INFO L78 Accepts]: Start accepts. Automaton has 7813 states and 12583 transitions. Word has length 479 [2021-02-23 14:12:18,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:18,409 INFO L480 AbstractCegarLoop]: Abstraction has 7813 states and 12583 transitions. [2021-02-23 14:12:18,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:18,410 INFO L276 IsEmpty]: Start isEmpty. Operand 7813 states and 12583 transitions. [2021-02-23 14:12:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2021-02-23 14:12:18,428 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:18,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:12:18,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-23 14:12:18,430 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:18,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:18,431 INFO L82 PathProgramCache]: Analyzing trace with hash 353262545, now seen corresponding path program 1 times [2021-02-23 14:12:18,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:18,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956936232] [2021-02-23 14:12:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:18,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:18,700 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:18,701 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:18,702 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:18,703 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:12:18,727 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:18,728 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:19,857 WARN L202 SmtUtils]: Spent 1.11 s on a formula simplification that was a NOOP. DAG size: 412 [2021-02-23 14:12:19,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:19,881 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:19,882 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:20,229 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 14:12:20,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956936232] [2021-02-23 14:12:20,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:20,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:20,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258976490] [2021-02-23 14:12:20,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:20,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:20,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:20,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:20,231 INFO L87 Difference]: Start difference. First operand 7813 states and 12583 transitions. Second operand 4 states. [2021-02-23 14:12:38,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:12:38,633 INFO L93 Difference]: Finished difference Result 22716 states and 36476 transitions. [2021-02-23 14:12:38,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:12:38,634 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2021-02-23 14:12:38,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:12:38,667 INFO L225 Difference]: With dead ends: 22716 [2021-02-23 14:12:38,668 INFO L226 Difference]: Without dead ends: 15302 [2021-02-23 14:12:38,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:38,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15302 states. [2021-02-23 14:12:39,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15302 to 15300. [2021-02-23 14:12:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15300 states. [2021-02-23 14:12:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15300 states to 15300 states and 24521 transitions. [2021-02-23 14:12:39,226 INFO L78 Accepts]: Start accepts. Automaton has 15300 states and 24521 transitions. Word has length 480 [2021-02-23 14:12:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:12:39,226 INFO L480 AbstractCegarLoop]: Abstraction has 15300 states and 24521 transitions. [2021-02-23 14:12:39,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:12:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 15300 states and 24521 transitions. [2021-02-23 14:12:39,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 481 [2021-02-23 14:12:39,346 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:12:39,346 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:12:39,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-23 14:12:39,347 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:12:39,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:12:39,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1027496022, now seen corresponding path program 1 times [2021-02-23 14:12:39,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:12:39,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80794365] [2021-02-23 14:12:39,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:12:39,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:39,538 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:39,538 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:39,539 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:39,540 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:12:39,544 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:39,545 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:40,658 WARN L202 SmtUtils]: Spent 1.10 s on a formula simplification that was a NOOP. DAG size: 412 [2021-02-23 14:12:40,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:12:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:12:40,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:12:40,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:12:40,939 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 14:12:40,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80794365] [2021-02-23 14:12:40,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:12:40,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:12:40,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108196731] [2021-02-23 14:12:40,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:12:40,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:12:40,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:12:40,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:12:40,943 INFO L87 Difference]: Start difference. First operand 15300 states and 24521 transitions. Second operand 4 states. [2021-02-23 14:13:00,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:00,416 INFO L93 Difference]: Finished difference Result 45644 states and 73118 transitions. [2021-02-23 14:13:00,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:13:00,417 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 480 [2021-02-23 14:13:00,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:00,476 INFO L225 Difference]: With dead ends: 45644 [2021-02-23 14:13:00,476 INFO L226 Difference]: Without dead ends: 30488 [2021-02-23 14:13:00,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:00,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30488 states. [2021-02-23 14:13:01,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30488 to 15398. [2021-02-23 14:13:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15398 states. [2021-02-23 14:13:01,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15398 states to 15398 states and 24672 transitions. [2021-02-23 14:13:01,403 INFO L78 Accepts]: Start accepts. Automaton has 15398 states and 24672 transitions. Word has length 480 [2021-02-23 14:13:01,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:01,404 INFO L480 AbstractCegarLoop]: Abstraction has 15398 states and 24672 transitions. [2021-02-23 14:13:01,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:01,404 INFO L276 IsEmpty]: Start isEmpty. Operand 15398 states and 24672 transitions. [2021-02-23 14:13:01,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-02-23 14:13:01,429 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:01,430 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 14:13:01,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-23 14:13:01,430 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:01,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:01,431 INFO L82 PathProgramCache]: Analyzing trace with hash 591410177, now seen corresponding path program 1 times [2021-02-23 14:13:01,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:01,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870021928] [2021-02-23 14:13:01,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:01,613 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:01,614 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:01,615 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:01,616 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-23 14:13:01,621 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:01,622 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:02,653 WARN L202 SmtUtils]: Spent 1.01 s on a formula simplification that was a NOOP. DAG size: 412 [2021-02-23 14:13:02,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:02,680 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:02,681 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:02,932 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 14:13:02,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870021928] [2021-02-23 14:13:02,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:02,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:02,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800841381] [2021-02-23 14:13:02,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:02,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:02,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:02,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:02,935 INFO L87 Difference]: Start difference. First operand 15398 states and 24672 transitions. Second operand 4 states. [2021-02-23 14:13:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:23,257 INFO L93 Difference]: Finished difference Result 45779 states and 73299 transitions. [2021-02-23 14:13:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:13:23,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 481 [2021-02-23 14:13:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:23,324 INFO L225 Difference]: With dead ends: 45779 [2021-02-23 14:13:23,324 INFO L226 Difference]: Without dead ends: 30605 [2021-02-23 14:13:23,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:23,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30605 states. [2021-02-23 14:13:24,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30605 to 15515. [2021-02-23 14:13:24,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15515 states. [2021-02-23 14:13:24,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15515 states to 15515 states and 24818 transitions. [2021-02-23 14:13:24,278 INFO L78 Accepts]: Start accepts. Automaton has 15515 states and 24818 transitions. Word has length 481 [2021-02-23 14:13:24,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:24,278 INFO L480 AbstractCegarLoop]: Abstraction has 15515 states and 24818 transitions. [2021-02-23 14:13:24,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 15515 states and 24818 transitions. [2021-02-23 14:13:24,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-02-23 14:13:24,305 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:24,306 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:13:24,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-23 14:13:24,306 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:24,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:24,307 INFO L82 PathProgramCache]: Analyzing trace with hash 442128428, now seen corresponding path program 1 times [2021-02-23 14:13:24,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:24,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080233820] [2021-02-23 14:13:24,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:24,562 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:24,563 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:24,564 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:24,564 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:13:24,570 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:24,571 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:25,716 WARN L202 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 412 [2021-02-23 14:13:25,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:25,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:25,745 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:25,745 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:26,083 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 14:13:26,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080233820] [2021-02-23 14:13:26,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:26,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:13:26,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085907819] [2021-02-23 14:13:26,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:13:26,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:26,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:13:26,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:26,086 INFO L87 Difference]: Start difference. First operand 15515 states and 24818 transitions. Second operand 4 states. [2021-02-23 14:13:47,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:13:47,066 INFO L93 Difference]: Finished difference Result 44734 states and 71393 transitions. [2021-02-23 14:13:47,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:13:47,067 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 482 [2021-02-23 14:13:47,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:13:47,119 INFO L225 Difference]: With dead ends: 44734 [2021-02-23 14:13:47,120 INFO L226 Difference]: Without dead ends: 30188 [2021-02-23 14:13:47,146 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:13:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30188 states. [2021-02-23 14:13:48,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30188 to 30186. [2021-02-23 14:13:48,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30186 states. [2021-02-23 14:13:48,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30186 states to 30186 states and 48059 transitions. [2021-02-23 14:13:48,716 INFO L78 Accepts]: Start accepts. Automaton has 30186 states and 48059 transitions. Word has length 482 [2021-02-23 14:13:48,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:13:48,716 INFO L480 AbstractCegarLoop]: Abstraction has 30186 states and 48059 transitions. [2021-02-23 14:13:48,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:13:48,717 INFO L276 IsEmpty]: Start isEmpty. Operand 30186 states and 48059 transitions. [2021-02-23 14:13:48,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 483 [2021-02-23 14:13:48,745 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:13:48,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:13:48,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-23 14:13:48,746 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:13:48,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:13:48,747 INFO L82 PathProgramCache]: Analyzing trace with hash -345133047, now seen corresponding path program 1 times [2021-02-23 14:13:48,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:13:48,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788496443] [2021-02-23 14:13:48,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:13:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:49,753 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:49,754 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:49,755 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:49,756 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:13:49,765 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-23 14:13:49,766 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-23 14:13:49,793 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:49,795 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:13:49,812 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:49,812 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:51,020 WARN L202 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 412 [2021-02-23 14:13:51,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:13:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:13:51,044 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:13:51,044 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:13:51,317 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 14:13:51,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788496443] [2021-02-23 14:13:51,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:13:51,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:13:51,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564585690] [2021-02-23 14:13:51,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:13:51,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:13:51,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:13:51,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:13:51,320 INFO L87 Difference]: Start difference. First operand 30186 states and 48059 transitions. Second operand 6 states. [2021-02-23 14:14:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:09,764 INFO L93 Difference]: Finished difference Result 88870 states and 141437 transitions. [2021-02-23 14:14:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:14:09,765 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 482 [2021-02-23 14:14:09,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:09,839 INFO L225 Difference]: With dead ends: 88870 [2021-02-23 14:14:09,839 INFO L226 Difference]: Without dead ends: 58902 [2021-02-23 14:14:09,876 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:09,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58902 states. [2021-02-23 14:14:12,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58902 to 58900. [2021-02-23 14:14:12,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58900 states. [2021-02-23 14:14:12,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58900 states to 58900 states and 93322 transitions. [2021-02-23 14:14:12,780 INFO L78 Accepts]: Start accepts. Automaton has 58900 states and 93322 transitions. Word has length 482 [2021-02-23 14:14:12,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:12,781 INFO L480 AbstractCegarLoop]: Abstraction has 58900 states and 93322 transitions. [2021-02-23 14:14:12,781 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:14:12,781 INFO L276 IsEmpty]: Start isEmpty. Operand 58900 states and 93322 transitions. [2021-02-23 14:14:13,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 485 [2021-02-23 14:14:13,153 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:13,154 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:14:13,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-23 14:14:13,157 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:13,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:13,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1301858362, now seen corresponding path program 1 times [2021-02-23 14:14:13,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:13,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243656658] [2021-02-23 14:14:13,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:13,640 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:13,640 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:13,642 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:13,643 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-23 14:14:13,648 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:13,649 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:14,955 WARN L202 SmtUtils]: Spent 1.29 s on a formula simplification that was a NOOP. DAG size: 412 [2021-02-23 14:14:14,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:14,989 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:14,990 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:15,395 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 14:14:15,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243656658] [2021-02-23 14:14:15,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:15,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-23 14:14:15,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423299335] [2021-02-23 14:14:15,397 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-23 14:14:15,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:15,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-23 14:14:15,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:15,398 INFO L87 Difference]: Start difference. First operand 58900 states and 93322 transitions. Second operand 4 states. [2021-02-23 14:14:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:14:41,085 INFO L93 Difference]: Finished difference Result 173518 states and 274689 transitions. [2021-02-23 14:14:41,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-23 14:14:41,086 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 484 [2021-02-23 14:14:41,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:14:41,230 INFO L225 Difference]: With dead ends: 173518 [2021-02-23 14:14:41,230 INFO L226 Difference]: Without dead ends: 116160 [2021-02-23 14:14:41,450 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-23 14:14:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116160 states. [2021-02-23 14:14:47,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116160 to 116158. [2021-02-23 14:14:47,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116158 states. [2021-02-23 14:14:47,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116158 states to 116158 states and 183304 transitions. [2021-02-23 14:14:47,731 INFO L78 Accepts]: Start accepts. Automaton has 116158 states and 183304 transitions. Word has length 484 [2021-02-23 14:14:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:14:47,732 INFO L480 AbstractCegarLoop]: Abstraction has 116158 states and 183304 transitions. [2021-02-23 14:14:47,732 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-23 14:14:47,732 INFO L276 IsEmpty]: Start isEmpty. Operand 116158 states and 183304 transitions. [2021-02-23 14:14:47,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 487 [2021-02-23 14:14:47,853 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:14:47,853 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:14:47,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-23 14:14:47,854 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:14:47,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:14:47,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1733757474, now seen corresponding path program 1 times [2021-02-23 14:14:47,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:14:47,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133529727] [2021-02-23 14:14:47,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:14:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:48,612 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:48,613 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:48,614 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:48,615 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:14:48,622 WARN L141 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size [2021-02-23 14:14:48,624 WARN L147 QuantifierPusher]: treesize reduction 6, result has 83.3 percent of original size 30 [2021-02-23 14:14:48,647 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:48,650 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:14:48,666 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:48,666 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:50,104 WARN L202 SmtUtils]: Spent 1.41 s on a formula simplification that was a NOOP. DAG size: 412 [2021-02-23 14:14:50,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:14:50,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:14:50,134 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:14:50,137 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:14:50,695 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 14:14:50,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133529727] [2021-02-23 14:14:50,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:14:50,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-23 14:14:50,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107908179] [2021-02-23 14:14:50,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-23 14:14:50,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:14:50,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-23 14:14:50,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:14:50,698 INFO L87 Difference]: Start difference. First operand 116158 states and 183304 transitions. Second operand 6 states. [2021-02-23 14:15:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:15:18,430 INFO L93 Difference]: Finished difference Result 344636 states and 543771 transitions. [2021-02-23 14:15:18,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:15:18,431 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 486 [2021-02-23 14:15:18,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:15:18,788 INFO L225 Difference]: With dead ends: 344636 [2021-02-23 14:15:18,788 INFO L226 Difference]: Without dead ends: 228815 [2021-02-23 14:15:18,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:15:19,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228815 states. [2021-02-23 14:15:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228815 to 228813. [2021-02-23 14:15:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228813 states. [2021-02-23 14:15:32,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228813 states to 228813 states and 359454 transitions. [2021-02-23 14:15:32,911 INFO L78 Accepts]: Start accepts. Automaton has 228813 states and 359454 transitions. Word has length 486 [2021-02-23 14:15:32,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:15:32,912 INFO L480 AbstractCegarLoop]: Abstraction has 228813 states and 359454 transitions. [2021-02-23 14:15:32,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-23 14:15:32,912 INFO L276 IsEmpty]: Start isEmpty. Operand 228813 states and 359454 transitions. [2021-02-23 14:15:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2021-02-23 14:15:33,122 INFO L414 BasicCegarLoop]: Found error trace [2021-02-23 14:15:33,122 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-23 14:15:33,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-23 14:15:33,122 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-23 14:15:33,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-23 14:15:33,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1440289857, now seen corresponding path program 1 times [2021-02-23 14:15:33,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-23 14:15:33,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449465668] [2021-02-23 14:15:33,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-23 14:15:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:34,202 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:34,203 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:34,204 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:34,205 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-23 14:15:34,211 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:34,216 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-23 14:15:34,232 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:34,233 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:35,563 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 412 [2021-02-23 14:15:35,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-23 14:15:35,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-23 14:15:35,582 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-23 14:15:35,583 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-23 14:15:35,909 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 14:15:35,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449465668] [2021-02-23 14:15:35,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-23 14:15:35,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-23 14:15:35,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935066922] [2021-02-23 14:15:35,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-23 14:15:35,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-23 14:15:35,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-23 14:15:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-23 14:15:35,912 INFO L87 Difference]: Start difference. First operand 228813 states and 359454 transitions. Second operand 5 states. [2021-02-23 14:16:16,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-23 14:16:16,301 INFO L93 Difference]: Finished difference Result 679803 states and 1067622 transitions. [2021-02-23 14:16:16,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-23 14:16:16,303 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 488 [2021-02-23 14:16:16,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-23 14:16:17,328 INFO L225 Difference]: With dead ends: 679803 [2021-02-23 14:16:17,329 INFO L226 Difference]: Without dead ends: 451841 [2021-02-23 14:16:17,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-23 14:16:17,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451841 states. [2021-02-23 14:16:44,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451841 to 451839. [2021-02-23 14:16:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 451839 states. [2021-02-23 14:16:45,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451839 states to 451839 states and 706560 transitions. [2021-02-23 14:16:45,463 INFO L78 Accepts]: Start accepts. Automaton has 451839 states and 706560 transitions. Word has length 488 [2021-02-23 14:16:45,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-23 14:16:45,464 INFO L480 AbstractCegarLoop]: Abstraction has 451839 states and 706560 transitions. [2021-02-23 14:16:45,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-23 14:16:45,464 INFO L276 IsEmpty]: Start isEmpty. Operand 451839 states and 706560 transitions.