/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 16:50:18,995 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 16:50:18,998 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 16:50:19,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-02-21 16:50:19,038 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-02-21 16:50:19,039 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-02-21 16:50:19,041 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-02-21 16:50:19,043 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-02-21 16:50:19,045 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-02-21 16:50:19,046 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-02-21 16:50:19,048 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-02-21 16:50:19,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-02-21 16:50:19,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 16:50:19,051 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 16:50:19,052 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 16:50:19,053 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 16:50:19,054 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 16:50:19,068 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 16:50:19,071 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 16:50:19,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 16:50:19,075 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 16:50:19,076 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 16:50:19,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 16:50:19,079 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 16:50:19,082 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 16:50:19,092 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 16:50:19,093 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 16:50:19,094 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 16:50:19,095 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 [2021-02-21 16:50:19,123 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 16:50:19,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 16:50:19,125 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-21 16:50:19,125 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-21 16:50:19,125 INFO L138 SettingsManager]: * Use SBE=true [2021-02-21 16:50:19,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 16:50:19,126 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 16:50:19,126 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 16:50:19,126 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 16:50:19,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 16:50:19,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 16:50:19,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 16:50:19,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 16:50:19,128 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 16:50:19,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 16:50:19,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 16:50:19,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 16:50:19,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 16:50:19,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-21 16:50:19,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 16:50:19,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 16:50:19,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 16:50:19,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-21 16:50:19,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-21 16:50:19,131 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-21 16:50:19,131 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-21 16:50:19,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 16:50:19,131 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-02-21 16:50:19,132 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 16:50:19,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 16:50:19,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 16:50:19,616 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 16:50:19,618 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 16:50:19,625 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 16:50:19,626 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-21 16:50:19,730 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a860841/72592f8a86cb46d4b01a5c964a625db5/FLAG64092f8c9 [2021-02-21 16:50:20,733 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 16:50:20,734 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-21 16:50:20,768 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a860841/72592f8a86cb46d4b01a5c964a625db5/FLAG64092f8c9 [2021-02-21 16:50:20,800 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d0a860841/72592f8a86cb46d4b01a5c964a625db5 [2021-02-21 16:50:20,804 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 16:50:20,820 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 16:50:20,822 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 16:50:20,822 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 16:50:20,827 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 16:50:20,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:50:20" (1/1) ... [2021-02-21 16:50:20,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@a174b1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:20, skipping insertion in model container [2021-02-21 16:50:20,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 04:50:20" (1/1) ... [2021-02-21 16:50:20,839 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 16:50:21,079 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 16:50:22,501 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[54562,54575] [2021-02-21 16:50:22,897 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:50:22,927 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 16:50:23,767 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/seq-mthreaded-reduced/pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c[54562,54575] [2021-02-21 16:50:24,108 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 16:50:24,152 INFO L208 MainTranslator]: Completed translation [2021-02-21 16:50:24,152 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:24 WrapperNode [2021-02-21 16:50:24,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 16:50:24,154 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 16:50:24,154 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 16:50:24,154 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 16:50:24,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:24" (1/1) ... [2021-02-21 16:50:24,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:24" (1/1) ... [2021-02-21 16:50:24,225 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:24" (1/1) ... [2021-02-21 16:50:24,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:24" (1/1) ... [2021-02-21 16:50:24,310 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:24" (1/1) ... [2021-02-21 16:50:24,378 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:24" (1/1) ... [2021-02-21 16:50:24,405 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:24" (1/1) ... [2021-02-21 16:50:24,435 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 16:50:24,437 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 16:50:24,437 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 16:50:24,437 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 16:50:24,438 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:24" (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 [2021-02-21 16:50:24,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 16:50:24,587 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 16:50:24,588 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 16:50:24,588 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-02-21 16:50:24,588 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 16:50:24,588 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 16:50:24,588 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 16:50:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 16:50:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 16:50:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-02-21 16:50:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2021-02-21 16:50:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 16:50:24,589 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2021-02-21 16:50:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-02-21 16:50:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure read [2021-02-21 16:50:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure write [2021-02-21 16:50:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2021-02-21 16:50:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2021-02-21 16:50:24,590 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2021-02-21 16:50:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2021-02-21 16:50:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2021-02-21 16:50:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure init [2021-02-21 16:50:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure check [2021-02-21 16:50:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 16:50:24,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 16:50:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 16:50:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 16:50:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 16:50:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 16:50:24,592 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 16:50:29,061 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 16:50:29,061 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-21 16:50:29,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:50:29 BoogieIcfgContainer [2021-02-21 16:50:29,066 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 16:50:29,070 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 16:50:29,070 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 16:50:29,074 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 16:50:29,074 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 04:50:20" (1/3) ... [2021-02-21 16:50:29,075 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ed74de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:50:29, skipping insertion in model container [2021-02-21 16:50:29,075 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 04:50:24" (2/3) ... [2021-02-21 16:50:29,076 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76ed74de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 04:50:29, skipping insertion in model container [2021-02-21 16:50:29,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 04:50:29" (3/3) ... [2021-02-21 16:50:29,077 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_opt-floodmax.5.2.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2021-02-21 16:50:29,084 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-21 16:50:29,091 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 16:50:29,110 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 16:50:29,157 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 16:50:29,157 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 16:50:29,157 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-21 16:50:29,157 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 16:50:29,157 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 16:50:29,158 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 16:50:29,158 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 16:50:29,158 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 16:50:29,200 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states. [2021-02-21 16:50:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-02-21 16:50:29,287 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:50:29,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:50:29,292 INFO L428 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:50:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:50:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1207961459, now seen corresponding path program 1 times [2021-02-21 16:50:29,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:50:29,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784740278] [2021-02-21 16:50:29,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:50:29,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:30,754 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:30,755 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:30,757 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:30,758 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 16:50:30,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:30,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:32,128 WARN L202 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:50:32,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:50:32,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:32,158 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:32,159 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:50:32,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784740278] [2021-02-21 16:50:32,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:50:32,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:50:32,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556329407] [2021-02-21 16:50:32,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:50:32,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:50:32,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:50:32,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:50:32,616 INFO L87 Difference]: Start difference. First operand 1449 states. Second operand 4 states. [2021-02-21 16:50:33,955 WARN L202 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 428 [2021-02-21 16:50:45,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:50:45,498 INFO L93 Difference]: Finished difference Result 2488 states and 4423 transitions. [2021-02-21 16:50:45,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:50:45,500 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 496 [2021-02-21 16:50:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:50:45,548 INFO L225 Difference]: With dead ends: 2488 [2021-02-21 16:50:45,549 INFO L226 Difference]: Without dead ends: 2186 [2021-02-21 16:50:45,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:50:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2186 states. [2021-02-21 16:50:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2186 to 2184. [2021-02-21 16:50:45,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2184 states. [2021-02-21 16:50:45,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2184 states to 2184 states and 3563 transitions. [2021-02-21 16:50:45,743 INFO L78 Accepts]: Start accepts. Automaton has 2184 states and 3563 transitions. Word has length 496 [2021-02-21 16:50:45,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:50:45,745 INFO L480 AbstractCegarLoop]: Abstraction has 2184 states and 3563 transitions. [2021-02-21 16:50:45,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:50:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 2184 states and 3563 transitions. [2021-02-21 16:50:45,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2021-02-21 16:50:45,759 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:50:45,760 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:50:45,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 16:50:45,761 INFO L428 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:50:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:50:45,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1252335372, now seen corresponding path program 1 times [2021-02-21 16:50:45,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:50:45,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442530871] [2021-02-21 16:50:45,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:50:46,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:47,061 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:47,062 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:47,064 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:47,065 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:50:47,084 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:47,086 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:50:47,114 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:47,115 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:48,474 WARN L202 SmtUtils]: Spent 1.31 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:50:48,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:50:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:50:48,502 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:50:48,503 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:50:48,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:50:48,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442530871] [2021-02-21 16:50:48,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:50:48,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:50:48,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054581697] [2021-02-21 16:50:48,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:50:48,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:50:48,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:50:48,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:50:48,917 INFO L87 Difference]: Start difference. First operand 2184 states and 3563 transitions. Second operand 5 states. [2021-02-21 16:51:04,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:51:04,769 INFO L93 Difference]: Finished difference Result 6476 states and 10564 transitions. [2021-02-21 16:51:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:51:04,770 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 496 [2021-02-21 16:51:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:51:04,795 INFO L225 Difference]: With dead ends: 6476 [2021-02-21 16:51:04,795 INFO L226 Difference]: Without dead ends: 4309 [2021-02-21 16:51:04,804 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 [2021-02-21 16:51:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2021-02-21 16:51:05,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 4307. [2021-02-21 16:51:05,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4307 states. [2021-02-21 16:51:05,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4307 states to 4307 states and 7000 transitions. [2021-02-21 16:51:05,042 INFO L78 Accepts]: Start accepts. Automaton has 4307 states and 7000 transitions. Word has length 496 [2021-02-21 16:51:05,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:51:05,043 INFO L480 AbstractCegarLoop]: Abstraction has 4307 states and 7000 transitions. [2021-02-21 16:51:05,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 16:51:05,044 INFO L276 IsEmpty]: Start isEmpty. Operand 4307 states and 7000 transitions. [2021-02-21 16:51:05,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 499 [2021-02-21 16:51:05,063 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:51:05,064 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:51:05,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 16:51:05,065 INFO L428 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:51:05,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:51:05,067 INFO L82 PathProgramCache]: Analyzing trace with hash -692847895, now seen corresponding path program 1 times [2021-02-21 16:51:05,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:51:05,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464614143] [2021-02-21 16:51:05,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:51:05,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:05,458 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:05,459 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:05,460 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:05,461 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:51:05,466 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:05,467 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:06,756 WARN L202 SmtUtils]: Spent 1.27 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:51:06,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:51:06,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:06,784 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:06,785 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:07,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:51:07,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464614143] [2021-02-21 16:51:07,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:51:07,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:51:07,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189536871] [2021-02-21 16:51:07,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:51:07,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:51:07,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:51:07,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:51:07,156 INFO L87 Difference]: Start difference. First operand 4307 states and 7000 transitions. Second operand 4 states. [2021-02-21 16:51:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:51:28,298 INFO L93 Difference]: Finished difference Result 12605 states and 20441 transitions. [2021-02-21 16:51:28,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:51:28,299 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 498 [2021-02-21 16:51:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:51:28,346 INFO L225 Difference]: With dead ends: 12605 [2021-02-21 16:51:28,346 INFO L226 Difference]: Without dead ends: 8512 [2021-02-21 16:51:28,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:51:28,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8512 states. [2021-02-21 16:51:28,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8512 to 8510. [2021-02-21 16:51:28,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8510 states. [2021-02-21 16:51:28,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8510 states to 8510 states and 13785 transitions. [2021-02-21 16:51:28,744 INFO L78 Accepts]: Start accepts. Automaton has 8510 states and 13785 transitions. Word has length 498 [2021-02-21 16:51:28,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:51:28,745 INFO L480 AbstractCegarLoop]: Abstraction has 8510 states and 13785 transitions. [2021-02-21 16:51:28,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:51:28,745 INFO L276 IsEmpty]: Start isEmpty. Operand 8510 states and 13785 transitions. [2021-02-21 16:51:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2021-02-21 16:51:28,774 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:51:28,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:51:28,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 16:51:28,777 INFO L428 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:51:28,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:51:28,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1954347945, now seen corresponding path program 1 times [2021-02-21 16:51:28,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:51:28,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521107199] [2021-02-21 16:51:28,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:51:28,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:28,974 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:28,975 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:28,976 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:28,976 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:51:28,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:28,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:30,134 WARN L202 SmtUtils]: Spent 1.13 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:51:30,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:51:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:30,162 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:30,163 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:30,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:51:30,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521107199] [2021-02-21 16:51:30,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:51:30,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:51:30,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397343957] [2021-02-21 16:51:30,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:51:30,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:51:30,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:51:30,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:51:30,459 INFO L87 Difference]: Start difference. First operand 8510 states and 13785 transitions. Second operand 4 states. [2021-02-21 16:51:51,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:51:51,959 INFO L93 Difference]: Finished difference Result 25433 states and 41187 transitions. [2021-02-21 16:51:51,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:51:51,959 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 499 [2021-02-21 16:51:51,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:51:52,024 INFO L225 Difference]: With dead ends: 25433 [2021-02-21 16:51:52,025 INFO L226 Difference]: Without dead ends: 16975 [2021-02-21 16:51:52,046 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 [2021-02-21 16:51:52,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16975 states. [2021-02-21 16:51:52,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16975 to 8557. [2021-02-21 16:51:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8557 states. [2021-02-21 16:51:52,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8557 states to 8557 states and 13859 transitions. [2021-02-21 16:51:52,583 INFO L78 Accepts]: Start accepts. Automaton has 8557 states and 13859 transitions. Word has length 499 [2021-02-21 16:51:52,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:51:52,583 INFO L480 AbstractCegarLoop]: Abstraction has 8557 states and 13859 transitions. [2021-02-21 16:51:52,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:51:52,584 INFO L276 IsEmpty]: Start isEmpty. Operand 8557 states and 13859 transitions. [2021-02-21 16:51:52,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-02-21 16:51:52,605 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:51:52,605 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:51:52,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 16:51:52,606 INFO L428 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:51:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:51:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1552552484, now seen corresponding path program 1 times [2021-02-21 16:51:52,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:51:52,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205055341] [2021-02-21 16:51:52,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:51:52,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:52,947 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:52,948 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:52,953 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:52,955 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:51:52,959 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:52,960 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:54,213 WARN L202 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:51:54,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:51:54,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:51:54,243 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:51:54,244 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:51:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:51:54,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205055341] [2021-02-21 16:51:54,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:51:54,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:51:54,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216025737] [2021-02-21 16:51:54,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:51:54,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:51:54,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:51:54,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:51:54,623 INFO L87 Difference]: Start difference. First operand 8557 states and 13859 transitions. Second operand 4 states. [2021-02-21 16:52:16,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:52:16,681 INFO L93 Difference]: Finished difference Result 24920 states and 40248 transitions. [2021-02-21 16:52:16,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:52:16,682 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2021-02-21 16:52:16,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:52:16,722 INFO L225 Difference]: With dead ends: 24920 [2021-02-21 16:52:16,722 INFO L226 Difference]: Without dead ends: 16762 [2021-02-21 16:52:16,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:52:16,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16762 states. [2021-02-21 16:52:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16762 to 16760. [2021-02-21 16:52:17,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16760 states. [2021-02-21 16:52:17,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16760 states to 16760 states and 27017 transitions. [2021-02-21 16:52:17,531 INFO L78 Accepts]: Start accepts. Automaton has 16760 states and 27017 transitions. Word has length 500 [2021-02-21 16:52:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:52:17,532 INFO L480 AbstractCegarLoop]: Abstraction has 16760 states and 27017 transitions. [2021-02-21 16:52:17,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:52:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 16760 states and 27017 transitions. [2021-02-21 16:52:17,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 501 [2021-02-21 16:52:17,570 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:52:17,571 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:52:17,571 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-02-21 16:52:17,571 INFO L428 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:52:17,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:52:17,572 INFO L82 PathProgramCache]: Analyzing trace with hash -1269065175, now seen corresponding path program 1 times [2021-02-21 16:52:17,572 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:52:17,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622757714] [2021-02-21 16:52:17,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:52:17,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:52:17,772 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:17,772 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:52:17,773 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:17,774 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:52:17,779 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:17,780 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:52:19,061 WARN L202 SmtUtils]: Spent 1.26 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:52:19,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:52:19,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:52:19,086 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:19,087 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:52:19,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:52:19,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622757714] [2021-02-21 16:52:19,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:52:19,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:52:19,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127573168] [2021-02-21 16:52:19,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:52:19,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:52:19,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:52:19,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:52:19,326 INFO L87 Difference]: Start difference. First operand 16760 states and 27017 transitions. Second operand 4 states. [2021-02-21 16:52:42,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:52:42,262 INFO L93 Difference]: Finished difference Result 50024 states and 80606 transitions. [2021-02-21 16:52:42,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:52:42,264 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 500 [2021-02-21 16:52:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:52:42,341 INFO L225 Difference]: With dead ends: 50024 [2021-02-21 16:52:42,341 INFO L226 Difference]: Without dead ends: 33408 [2021-02-21 16:52:42,379 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:52:42,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33408 states. [2021-02-21 16:52:43,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33408 to 16858. [2021-02-21 16:52:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16858 states. [2021-02-21 16:52:43,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16858 states to 16858 states and 27168 transitions. [2021-02-21 16:52:43,134 INFO L78 Accepts]: Start accepts. Automaton has 16858 states and 27168 transitions. Word has length 500 [2021-02-21 16:52:43,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:52:43,135 INFO L480 AbstractCegarLoop]: Abstraction has 16858 states and 27168 transitions. [2021-02-21 16:52:43,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:52:43,135 INFO L276 IsEmpty]: Start isEmpty. Operand 16858 states and 27168 transitions. [2021-02-21 16:52:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2021-02-21 16:52:43,167 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:52:43,167 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:52:43,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-02-21 16:52:43,168 INFO L428 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:52:43,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:52:43,168 INFO L82 PathProgramCache]: Analyzing trace with hash 2056128520, now seen corresponding path program 1 times [2021-02-21 16:52:43,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:52:43,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893998220] [2021-02-21 16:52:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:52:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:52:43,389 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:43,390 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:52:43,391 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:43,391 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-02-21 16:52:43,397 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:43,398 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:52:44,849 WARN L202 SmtUtils]: Spent 1.43 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:52:44,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:52:44,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:52:44,874 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:52:44,874 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:52:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:52:45,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893998220] [2021-02-21 16:52:45,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:52:45,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:52:45,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135673675] [2021-02-21 16:52:45,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:52:45,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:52:45,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:52:45,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:52:45,110 INFO L87 Difference]: Start difference. First operand 16858 states and 27168 transitions. Second operand 4 states. [2021-02-21 16:53:09,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:53:09,125 INFO L93 Difference]: Finished difference Result 50159 states and 80787 transitions. [2021-02-21 16:53:09,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:53:09,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 501 [2021-02-21 16:53:09,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:53:09,183 INFO L225 Difference]: With dead ends: 50159 [2021-02-21 16:53:09,183 INFO L226 Difference]: Without dead ends: 33525 [2021-02-21 16:53:09,222 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:53:09,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33525 states. [2021-02-21 16:53:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33525 to 16975. [2021-02-21 16:53:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16975 states. [2021-02-21 16:53:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16975 states to 16975 states and 27314 transitions. [2021-02-21 16:53:10,153 INFO L78 Accepts]: Start accepts. Automaton has 16975 states and 27314 transitions. Word has length 501 [2021-02-21 16:53:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:53:10,154 INFO L480 AbstractCegarLoop]: Abstraction has 16975 states and 27314 transitions. [2021-02-21 16:53:10,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:53:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 16975 states and 27314 transitions. [2021-02-21 16:53:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-02-21 16:53:10,185 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:53:10,185 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:53:10,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-02-21 16:53:10,186 INFO L428 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:53:10,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:53:10,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1918901086, now seen corresponding path program 1 times [2021-02-21 16:53:10,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:53:10,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782628875] [2021-02-21 16:53:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:53:10,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:53:10,431 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:10,432 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:10,433 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:10,434 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:53:10,441 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:10,441 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:11,812 WARN L202 SmtUtils]: Spent 1.35 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:53:11,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:53:11,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:53:11,836 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:11,837 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:53:12,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782628875] [2021-02-21 16:53:12,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:53:12,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:53:12,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531382663] [2021-02-21 16:53:12,074 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:53:12,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:53:12,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:53:12,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:53:12,075 INFO L87 Difference]: Start difference. First operand 16975 states and 27314 transitions. Second operand 4 states. [2021-02-21 16:53:28,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:53:28,839 INFO L93 Difference]: Finished difference Result 36907 states and 58972 transitions. [2021-02-21 16:53:28,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:53:28,840 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 502 [2021-02-21 16:53:28,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:53:28,880 INFO L225 Difference]: With dead ends: 36907 [2021-02-21 16:53:28,880 INFO L226 Difference]: Without dead ends: 24449 [2021-02-21 16:53:28,901 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 [2021-02-21 16:53:28,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24449 states. [2021-02-21 16:53:30,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24449 to 20175. [2021-02-21 16:53:30,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20175 states. [2021-02-21 16:53:30,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20175 states to 20175 states and 32638 transitions. [2021-02-21 16:53:30,061 INFO L78 Accepts]: Start accepts. Automaton has 20175 states and 32638 transitions. Word has length 502 [2021-02-21 16:53:30,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:53:30,061 INFO L480 AbstractCegarLoop]: Abstraction has 20175 states and 32638 transitions. [2021-02-21 16:53:30,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:53:30,062 INFO L276 IsEmpty]: Start isEmpty. Operand 20175 states and 32638 transitions. [2021-02-21 16:53:30,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2021-02-21 16:53:30,080 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:53:30,080 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:53:30,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-02-21 16:53:30,080 INFO L428 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:53:30,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:53:30,081 INFO L82 PathProgramCache]: Analyzing trace with hash 258986204, now seen corresponding path program 1 times [2021-02-21 16:53:30,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:53:30,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368481469] [2021-02-21 16:53:30,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:53:30,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:53:30,937 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:30,938 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:30,939 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:30,940 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:53:30,948 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-21 16:53:30,950 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-21 16:53:30,981 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:30,982 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:53:30,996 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:30,997 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:32,264 WARN L202 SmtUtils]: Spent 1.24 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:53:32,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:53:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:53:32,286 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:32,287 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:53:32,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368481469] [2021-02-21 16:53:32,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:53:32,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:53:32,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120888308] [2021-02-21 16:53:32,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:53:32,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:53:32,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:53:32,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:53:32,717 INFO L87 Difference]: Start difference. First operand 20175 states and 32638 transitions. Second operand 6 states. [2021-02-21 16:53:53,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:53:53,544 INFO L93 Difference]: Finished difference Result 59219 states and 95795 transitions. [2021-02-21 16:53:53,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:53:53,545 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 502 [2021-02-21 16:53:53,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:53:53,606 INFO L225 Difference]: With dead ends: 59219 [2021-02-21 16:53:53,607 INFO L226 Difference]: Without dead ends: 39217 [2021-02-21 16:53:53,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:53:53,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39217 states. [2021-02-21 16:53:55,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39217 to 39215. [2021-02-21 16:53:55,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39215 states. [2021-02-21 16:53:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39215 states to 39215 states and 63174 transitions. [2021-02-21 16:53:55,483 INFO L78 Accepts]: Start accepts. Automaton has 39215 states and 63174 transitions. Word has length 502 [2021-02-21 16:53:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:53:55,484 INFO L480 AbstractCegarLoop]: Abstraction has 39215 states and 63174 transitions. [2021-02-21 16:53:55,484 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:53:55,484 INFO L276 IsEmpty]: Start isEmpty. Operand 39215 states and 63174 transitions. [2021-02-21 16:53:55,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2021-02-21 16:53:55,515 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:53:55,516 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:53:55,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-02-21 16:53:55,516 INFO L428 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:53:55,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:53:55,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1508550229, now seen corresponding path program 1 times [2021-02-21 16:53:55,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:53:55,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11687798] [2021-02-21 16:53:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:53:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:53:55,857 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:55,858 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:55,860 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:55,860 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:53:55,866 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:55,867 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:57,333 WARN L202 SmtUtils]: Spent 1.44 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:53:57,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:53:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:53:57,364 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:53:57,365 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:53:57,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:53:57,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11687798] [2021-02-21 16:53:57,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:53:57,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:53:57,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628475631] [2021-02-21 16:53:57,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:53:57,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:53:57,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:53:57,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:53:57,668 INFO L87 Difference]: Start difference. First operand 39215 states and 63174 transitions. Second operand 4 states. [2021-02-21 16:54:24,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:54:24,608 INFO L93 Difference]: Finished difference Result 115372 states and 185708 transitions. [2021-02-21 16:54:24,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:54:24,609 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 504 [2021-02-21 16:54:24,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:54:24,727 INFO L225 Difference]: With dead ends: 115372 [2021-02-21 16:54:24,728 INFO L226 Difference]: Without dead ends: 77186 [2021-02-21 16:54:24,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:54:24,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77186 states. [2021-02-21 16:54:28,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77186 to 77184. [2021-02-21 16:54:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77184 states. [2021-02-21 16:54:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77184 states to 77184 states and 123876 transitions. [2021-02-21 16:54:29,015 INFO L78 Accepts]: Start accepts. Automaton has 77184 states and 123876 transitions. Word has length 504 [2021-02-21 16:54:29,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:54:29,015 INFO L480 AbstractCegarLoop]: Abstraction has 77184 states and 123876 transitions. [2021-02-21 16:54:29,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:54:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 77184 states and 123876 transitions. [2021-02-21 16:54:29,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-02-21 16:54:29,258 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:54:29,259 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:54:29,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-21 16:54:29,260 INFO L428 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:54:29,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:54:29,260 INFO L82 PathProgramCache]: Analyzing trace with hash 592381264, now seen corresponding path program 1 times [2021-02-21 16:54:29,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:54:29,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699544538] [2021-02-21 16:54:29,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:54:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:54:29,632 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:54:29,633 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:54:29,634 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:54:29,635 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-02-21 16:54:29,644 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:54:29,647 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:54:31,025 WARN L202 SmtUtils]: Spent 1.36 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:54:31,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:54:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:54:31,049 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:54:31,050 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:54:31,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:54:31,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699544538] [2021-02-21 16:54:31,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:54:31,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-21 16:54:31,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373190915] [2021-02-21 16:54:31,676 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-21 16:54:31,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:54:31,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-21 16:54:31,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-21 16:54:31,677 INFO L87 Difference]: Start difference. First operand 77184 states and 123876 transitions. Second operand 4 states. [2021-02-21 16:55:02,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:55:02,361 INFO L93 Difference]: Finished difference Result 226462 states and 362877 transitions. [2021-02-21 16:55:02,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-21 16:55:02,362 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 506 [2021-02-21 16:55:02,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:55:02,559 INFO L225 Difference]: With dead ends: 226462 [2021-02-21 16:55:02,560 INFO L226 Difference]: Without dead ends: 151564 [2021-02-21 16:55:02,631 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 [2021-02-21 16:55:02,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151564 states. [2021-02-21 16:55:10,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151564 to 151562. [2021-02-21 16:55:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151562 states. [2021-02-21 16:55:11,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151562 states to 151562 states and 242193 transitions. [2021-02-21 16:55:11,199 INFO L78 Accepts]: Start accepts. Automaton has 151562 states and 242193 transitions. Word has length 506 [2021-02-21 16:55:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:55:11,199 INFO L480 AbstractCegarLoop]: Abstraction has 151562 states and 242193 transitions. [2021-02-21 16:55:11,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-02-21 16:55:11,199 INFO L276 IsEmpty]: Start isEmpty. Operand 151562 states and 242193 transitions. [2021-02-21 16:55:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2021-02-21 16:55:11,593 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:55:11,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:55:11,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-02-21 16:55:11,593 INFO L428 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:55:11,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:55:11,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1760624621, now seen corresponding path program 1 times [2021-02-21 16:55:11,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:55:11,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780484364] [2021-02-21 16:55:11,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:55:12,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:55:12,652 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:55:12,652 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:55:12,656 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:55:12,657 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:55:12,664 WARN L141 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size [2021-02-21 16:55:12,665 WARN L147 QuantifierPusher]: treesize reduction 6, result has 87.0 percent of original size 40 [2021-02-21 16:55:12,691 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:55:12,693 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:55:12,709 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:55:12,710 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:55:14,083 WARN L202 SmtUtils]: Spent 1.34 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:55:14,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:55:14,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:55:14,105 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:55:14,106 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:55:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:55:14,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780484364] [2021-02-21 16:55:14,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:55:14,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-02-21 16:55:14,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661192250] [2021-02-21 16:55:14,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-21 16:55:14,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:55:14,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-21 16:55:14,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:55:14,534 INFO L87 Difference]: Start difference. First operand 151562 states and 242193 transitions. Second operand 6 states. [2021-02-21 16:55:48,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:55:48,827 INFO L93 Difference]: Finished difference Result 449758 states and 718681 transitions. [2021-02-21 16:55:48,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:55:48,829 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 506 [2021-02-21 16:55:48,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:55:49,547 INFO L225 Difference]: With dead ends: 449758 [2021-02-21 16:55:49,547 INFO L226 Difference]: Without dead ends: 298487 [2021-02-21 16:55:49,681 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 [2021-02-21 16:55:49,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298487 states. [2021-02-21 16:56:06,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298487 to 298485. [2021-02-21 16:56:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298485 states. [2021-02-21 16:56:07,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298485 states to 298485 states and 474962 transitions. [2021-02-21 16:56:07,729 INFO L78 Accepts]: Start accepts. Automaton has 298485 states and 474962 transitions. Word has length 506 [2021-02-21 16:56:07,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 16:56:07,729 INFO L480 AbstractCegarLoop]: Abstraction has 298485 states and 474962 transitions. [2021-02-21 16:56:07,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-02-21 16:56:07,729 INFO L276 IsEmpty]: Start isEmpty. Operand 298485 states and 474962 transitions. [2021-02-21 16:56:08,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 509 [2021-02-21 16:56:08,402 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 16:56:08,402 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 16:56:08,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-02-21 16:56:08,403 INFO L428 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 16:56:08,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 16:56:08,404 INFO L82 PathProgramCache]: Analyzing trace with hash 788630094, now seen corresponding path program 1 times [2021-02-21 16:56:08,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-21 16:56:08,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788032527] [2021-02-21 16:56:08,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 16:56:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:56:09,120 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:56:09,121 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:56:09,122 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:56:09,123 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 16:56:09,128 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:56:09,130 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-02-21 16:56:09,145 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:56:09,146 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:56:10,820 WARN L202 SmtUtils]: Spent 1.65 s on a formula simplification that was a NOOP. DAG size: 427 [2021-02-21 16:56:10,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 16:56:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 16:56:10,843 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 16:56:10,844 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 16:56:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 16:56:11,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788032527] [2021-02-21 16:56:11,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 16:56:11,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 16:56:11,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747107744] [2021-02-21 16:56:11,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 16:56:11,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-21 16:56:11,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 16:56:11,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 16:56:11,289 INFO L87 Difference]: Start difference. First operand 298485 states and 474962 transitions. Second operand 5 states. [2021-02-21 16:56:59,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 16:56:59,613 INFO L93 Difference]: Finished difference Result 886877 states and 1410660 transitions. [2021-02-21 16:56:59,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 16:56:59,615 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 508 [2021-02-21 16:56:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 16:57:00,979 INFO L225 Difference]: With dead ends: 886877 [2021-02-21 16:57:00,980 INFO L226 Difference]: Without dead ends: 589107 [2021-02-21 16:57:01,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-21 16:57:01,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589107 states.