/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:54:12,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:54:12,704 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:54:12,764 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:54:12,765 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:54:12,769 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:54:12,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:54:12,782 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:54:12,785 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:54:12,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:54:12,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:54:12,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:54:12,795 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:54:12,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:54:12,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:54:12,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:54:12,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:54:12,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:54:12,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:54:12,826 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:54:12,828 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:54:12,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:54:12,832 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:54:12,834 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:54:12,856 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 13:54:12,868 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:54:12,869 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:54:12,870 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:54:12,873 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:54:12,930 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:54:12,930 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:54:12,935 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:54:12,936 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:54:12,936 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:54:12,936 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:54:12,936 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:54:12,937 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:54:12,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:54:12,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:54:12,938 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:54:12,939 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:54:12,939 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:54:12,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:54:12,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:54:12,940 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:54:12,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:54:12,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:54:12,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:54:12,940 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:54:12,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:54:12,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:54:12,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:54:12,942 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:54:12,942 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:54:12,942 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:54:13,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:54:13,438 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:54:13,441 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:54:13,443 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:54:13,443 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:54:13,444 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2020-12-22 13:54:13,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4435e4b8b/e2b6437d0f094d4b824408789803f908/FLAG64c16060b [2020-12-22 13:54:14,662 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:54:14,663 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2020-12-22 13:54:14,728 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4435e4b8b/e2b6437d0f094d4b824408789803f908/FLAG64c16060b [2020-12-22 13:54:15,079 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4435e4b8b/e2b6437d0f094d4b824408789803f908 [2020-12-22 13:54:15,082 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:54:15,085 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:54:15,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:54:15,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:54:15,090 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:54:15,091 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:54:15" (1/1) ... [2020-12-22 13:54:15,092 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14ce19c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:15, skipping insertion in model container [2020-12-22 13:54:15,093 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:54:15" (1/1) ... [2020-12-22 13:54:15,101 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:54:15,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:54:17,239 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i[208384,208397] [2020-12-22 13:54:17,301 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2020-12-22 13:54:17,319 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:54:17,390 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:54:17,818 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i[208384,208397] [2020-12-22 13:54:17,825 WARN L612 FunctionHandler]: implicit declaration of function ldv_xmalloc [2020-12-22 13:54:17,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:54:18,167 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:54:18,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:18 WrapperNode [2020-12-22 13:54:18,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:54:18,170 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:54:18,170 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:54:18,172 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:54:18,182 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:18" (1/1) ... [2020-12-22 13:54:18,309 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:18" (1/1) ... [2020-12-22 13:54:18,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:54:18,796 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:54:18,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:54:18,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:54:18,808 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:18" (1/1) ... [2020-12-22 13:54:18,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:18" (1/1) ... [2020-12-22 13:54:18,882 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:18" (1/1) ... [2020-12-22 13:54:18,883 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:18" (1/1) ... [2020-12-22 13:54:19,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:18" (1/1) ... [2020-12-22 13:54:19,286 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:18" (1/1) ... [2020-12-22 13:54:19,328 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:18" (1/1) ... [2020-12-22 13:54:19,388 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:54:19,389 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:54:19,389 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:54:19,390 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:54:19,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:54:19,602 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:54:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:54:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:54:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:54:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_xmalloc [2020-12-22 13:54:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:54:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:54:19,603 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:54:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:54:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:54:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:54:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:54:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:54:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:54:19,604 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:54:19,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:55:07,228 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:55:07,228 INFO L299 CfgBuilder]: Removed 1941 assume(true) statements. [2020-12-22 13:55:07,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:55:07 BoogieIcfgContainer [2020-12-22 13:55:07,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:55:07,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:55:07,236 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:55:07,240 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:55:07,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:54:15" (1/3) ... [2020-12-22 13:55:07,241 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dbe664b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:55:07, skipping insertion in model container [2020-12-22 13:55:07,241 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:54:18" (2/3) ... [2020-12-22 13:55:07,242 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dbe664b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:55:07, skipping insertion in model container [2020-12-22 13:55:07,242 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:55:07" (3/3) ... [2020-12-22 13:55:07,243 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--iio--imu--inv_mpu6050--inv-mpu6050.ko-entry_point.cil.out.i [2020-12-22 13:55:07,251 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:55:07,261 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:55:07,283 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:55:07,322 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:55:07,323 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:55:07,323 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:55:07,323 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:55:07,323 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:55:07,323 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:55:07,323 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:55:07,323 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:55:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1970 states. [2020-12-22 13:55:07,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 13:55:07,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:07,396 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] [2020-12-22 13:55:07,396 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:07,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:07,402 INFO L82 PathProgramCache]: Analyzing trace with hash 1900913398, now seen corresponding path program 1 times [2020-12-22 13:55:07,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:07,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988775058] [2020-12-22 13:55:07,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:08,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:55:08,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988775058] [2020-12-22 13:55:08,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:55:08,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:55:08,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726134551] [2020-12-22 13:55:08,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 13:55:08,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:08,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 13:55:08,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 13:55:08,429 INFO L87 Difference]: Start difference. First operand 1970 states. Second operand 2 states. [2020-12-22 13:55:08,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:08,606 INFO L93 Difference]: Finished difference Result 3936 states and 5569 transitions. [2020-12-22 13:55:08,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 13:55:08,608 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 94 [2020-12-22 13:55:08,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:08,651 INFO L225 Difference]: With dead ends: 3936 [2020-12-22 13:55:08,652 INFO L226 Difference]: Without dead ends: 1956 [2020-12-22 13:55:08,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 13:55:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1956 states. [2020-12-22 13:55:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1956 to 1956. [2020-12-22 13:55:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1956 states. [2020-12-22 13:55:08,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1956 states to 1956 states and 2735 transitions. [2020-12-22 13:55:08,849 INFO L78 Accepts]: Start accepts. Automaton has 1956 states and 2735 transitions. Word has length 94 [2020-12-22 13:55:08,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:08,849 INFO L481 AbstractCegarLoop]: Abstraction has 1956 states and 2735 transitions. [2020-12-22 13:55:08,849 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 13:55:08,850 INFO L276 IsEmpty]: Start isEmpty. Operand 1956 states and 2735 transitions. [2020-12-22 13:55:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-12-22 13:55:08,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:08,864 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] [2020-12-22 13:55:08,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:55:08,865 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash 753017488, now seen corresponding path program 1 times [2020-12-22 13:55:08,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:08,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715177116] [2020-12-22 13:55:08,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:09,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:55:09,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715177116] [2020-12-22 13:55:09,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:55:09,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:55:09,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267416246] [2020-12-22 13:55:09,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:55:09,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:09,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:55:09,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:55:09,374 INFO L87 Difference]: Start difference. First operand 1956 states and 2735 transitions. Second operand 3 states. [2020-12-22 13:55:11,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:11,743 INFO L93 Difference]: Finished difference Result 5678 states and 8005 transitions. [2020-12-22 13:55:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:55:11,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 94 [2020-12-22 13:55:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:11,771 INFO L225 Difference]: With dead ends: 5678 [2020-12-22 13:55:11,772 INFO L226 Difference]: Without dead ends: 3800 [2020-12-22 13:55:11,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:55:11,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3800 states. [2020-12-22 13:55:11,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3800 to 3800. [2020-12-22 13:55:11,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3800 states. [2020-12-22 13:55:11,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 5350 transitions. [2020-12-22 13:55:11,904 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 5350 transitions. Word has length 94 [2020-12-22 13:55:11,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:11,907 INFO L481 AbstractCegarLoop]: Abstraction has 3800 states and 5350 transitions. [2020-12-22 13:55:11,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:55:11,908 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 5350 transitions. [2020-12-22 13:55:11,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 13:55:11,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:11,913 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] [2020-12-22 13:55:11,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:55:11,913 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:11,917 INFO L82 PathProgramCache]: Analyzing trace with hash -493821856, now seen corresponding path program 1 times [2020-12-22 13:55:11,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:11,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282254719] [2020-12-22 13:55:11,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:12,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:12,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:55:12,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282254719] [2020-12-22 13:55:12,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:55:12,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:55:12,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119667158] [2020-12-22 13:55:12,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:55:12,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:12,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:55:12,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:55:12,678 INFO L87 Difference]: Start difference. First operand 3800 states and 5350 transitions. Second operand 3 states. [2020-12-22 13:55:12,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:12,875 INFO L93 Difference]: Finished difference Result 7522 states and 10617 transitions. [2020-12-22 13:55:12,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:55:12,876 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2020-12-22 13:55:12,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:12,920 INFO L225 Difference]: With dead ends: 7522 [2020-12-22 13:55:12,920 INFO L226 Difference]: Without dead ends: 7518 [2020-12-22 13:55:12,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:55:12,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7518 states. [2020-12-22 13:55:13,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7518 to 7518. [2020-12-22 13:55:13,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7518 states. [2020-12-22 13:55:13,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7518 states to 7518 states and 10611 transitions. [2020-12-22 13:55:13,184 INFO L78 Accepts]: Start accepts. Automaton has 7518 states and 10611 transitions. Word has length 98 [2020-12-22 13:55:13,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:13,188 INFO L481 AbstractCegarLoop]: Abstraction has 7518 states and 10611 transitions. [2020-12-22 13:55:13,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:55:13,189 INFO L276 IsEmpty]: Start isEmpty. Operand 7518 states and 10611 transitions. [2020-12-22 13:55:13,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-12-22 13:55:13,207 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:13,208 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:13,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:55:13,208 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:13,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:13,209 INFO L82 PathProgramCache]: Analyzing trace with hash 645158019, now seen corresponding path program 1 times [2020-12-22 13:55:13,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:13,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661326809] [2020-12-22 13:55:13,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:13,676 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:55:13,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661326809] [2020-12-22 13:55:13,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:55:13,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:55:13,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391496545] [2020-12-22 13:55:13,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:55:13,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:13,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:55:13,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:55:13,680 INFO L87 Difference]: Start difference. First operand 7518 states and 10611 transitions. Second operand 3 states. [2020-12-22 13:55:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:14,347 INFO L93 Difference]: Finished difference Result 21152 states and 29896 transitions. [2020-12-22 13:55:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:55:14,348 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 167 [2020-12-22 13:55:14,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:14,424 INFO L225 Difference]: With dead ends: 21152 [2020-12-22 13:55:14,425 INFO L226 Difference]: Without dead ends: 13712 [2020-12-22 13:55:14,442 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:55:14,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13712 states. [2020-12-22 13:55:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13712 to 13698. [2020-12-22 13:55:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13698 states. [2020-12-22 13:55:14,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13698 states to 13698 states and 19351 transitions. [2020-12-22 13:55:14,950 INFO L78 Accepts]: Start accepts. Automaton has 13698 states and 19351 transitions. Word has length 167 [2020-12-22 13:55:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:14,952 INFO L481 AbstractCegarLoop]: Abstraction has 13698 states and 19351 transitions. [2020-12-22 13:55:14,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:55:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 13698 states and 19351 transitions. [2020-12-22 13:55:14,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-12-22 13:55:14,978 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:14,978 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:14,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:55:14,979 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:14,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:14,980 INFO L82 PathProgramCache]: Analyzing trace with hash -256455826, now seen corresponding path program 1 times [2020-12-22 13:55:14,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:14,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197996575] [2020-12-22 13:55:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:55:15,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197996575] [2020-12-22 13:55:15,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:55:15,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:55:15,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23635055] [2020-12-22 13:55:15,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:55:15,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:15,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:55:15,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:55:15,572 INFO L87 Difference]: Start difference. First operand 13698 states and 19351 transitions. Second operand 3 states. [2020-12-22 13:55:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:17,162 INFO L93 Difference]: Finished difference Result 39786 states and 56223 transitions. [2020-12-22 13:55:17,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:55:17,163 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 208 [2020-12-22 13:55:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:17,291 INFO L225 Difference]: With dead ends: 39786 [2020-12-22 13:55:17,291 INFO L226 Difference]: Without dead ends: 26166 [2020-12-22 13:55:17,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:55:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26166 states. [2020-12-22 13:55:18,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26166 to 13954. [2020-12-22 13:55:18,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13954 states. [2020-12-22 13:55:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13954 states to 13954 states and 19607 transitions. [2020-12-22 13:55:18,064 INFO L78 Accepts]: Start accepts. Automaton has 13954 states and 19607 transitions. Word has length 208 [2020-12-22 13:55:18,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:18,065 INFO L481 AbstractCegarLoop]: Abstraction has 13954 states and 19607 transitions. [2020-12-22 13:55:18,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:55:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 13954 states and 19607 transitions. [2020-12-22 13:55:18,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-22 13:55:18,088 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:18,088 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:18,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:55:18,089 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:18,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:18,090 INFO L82 PathProgramCache]: Analyzing trace with hash 958334802, now seen corresponding path program 1 times [2020-12-22 13:55:18,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:18,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741272456] [2020-12-22 13:55:18,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:18,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:55:18,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741272456] [2020-12-22 13:55:18,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:55:18,702 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:55:18,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744720342] [2020-12-22 13:55:18,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:55:18,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:18,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:55:18,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:55:18,704 INFO L87 Difference]: Start difference. First operand 13954 states and 19607 transitions. Second operand 4 states. [2020-12-22 13:55:21,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:21,334 INFO L93 Difference]: Finished difference Result 65322 states and 91703 transitions. [2020-12-22 13:55:21,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:55:21,335 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 210 [2020-12-22 13:55:21,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:21,513 INFO L225 Difference]: With dead ends: 65322 [2020-12-22 13:55:21,513 INFO L226 Difference]: Without dead ends: 51446 [2020-12-22 13:55:21,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:55:21,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51446 states. [2020-12-22 13:55:22,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51446 to 13962. [2020-12-22 13:55:22,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13962 states. [2020-12-22 13:55:22,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13962 states to 13962 states and 19615 transitions. [2020-12-22 13:55:22,866 INFO L78 Accepts]: Start accepts. Automaton has 13962 states and 19615 transitions. Word has length 210 [2020-12-22 13:55:22,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:22,875 INFO L481 AbstractCegarLoop]: Abstraction has 13962 states and 19615 transitions. [2020-12-22 13:55:22,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:55:22,875 INFO L276 IsEmpty]: Start isEmpty. Operand 13962 states and 19615 transitions. [2020-12-22 13:55:22,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2020-12-22 13:55:22,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:22,899 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:22,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:55:22,900 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:22,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:22,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1564351022, now seen corresponding path program 1 times [2020-12-22 13:55:22,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:22,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701966593] [2020-12-22 13:55:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:23,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:55:23,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701966593] [2020-12-22 13:55:23,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:55:23,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:55:23,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414889647] [2020-12-22 13:55:23,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:55:23,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:23,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:55:23,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:55:23,413 INFO L87 Difference]: Start difference. First operand 13962 states and 19615 transitions. Second operand 4 states. [2020-12-22 13:55:26,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:26,537 INFO L93 Difference]: Finished difference Result 67186 states and 94475 transitions. [2020-12-22 13:55:26,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:55:26,538 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 210 [2020-12-22 13:55:26,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:26,680 INFO L225 Difference]: With dead ends: 67186 [2020-12-22 13:55:26,680 INFO L226 Difference]: Without dead ends: 53302 [2020-12-22 13:55:26,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:55:26,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53302 states. [2020-12-22 13:55:27,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53302 to 13970. [2020-12-22 13:55:27,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13970 states. [2020-12-22 13:55:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13970 states to 13970 states and 19623 transitions. [2020-12-22 13:55:27,964 INFO L78 Accepts]: Start accepts. Automaton has 13970 states and 19623 transitions. Word has length 210 [2020-12-22 13:55:27,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:27,965 INFO L481 AbstractCegarLoop]: Abstraction has 13970 states and 19623 transitions. [2020-12-22 13:55:27,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:55:27,965 INFO L276 IsEmpty]: Start isEmpty. Operand 13970 states and 19623 transitions. [2020-12-22 13:55:27,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 13:55:27,986 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:27,986 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:27,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:55:27,987 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:27,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:27,987 INFO L82 PathProgramCache]: Analyzing trace with hash 770784155, now seen corresponding path program 1 times [2020-12-22 13:55:27,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:27,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125744235] [2020-12-22 13:55:27,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:28,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:55:28,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125744235] [2020-12-22 13:55:28,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:55:28,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:55:28,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206552540] [2020-12-22 13:55:28,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:55:28,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:28,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:55:28,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:55:28,794 INFO L87 Difference]: Start difference. First operand 13970 states and 19623 transitions. Second operand 3 states. [2020-12-22 13:55:30,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:30,447 INFO L93 Difference]: Finished difference Result 41718 states and 58631 transitions. [2020-12-22 13:55:30,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:55:30,448 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 216 [2020-12-22 13:55:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:30,532 INFO L225 Difference]: With dead ends: 41718 [2020-12-22 13:55:30,532 INFO L226 Difference]: Without dead ends: 27826 [2020-12-22 13:55:30,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:55:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27826 states. [2020-12-22 13:55:31,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27826 to 24654. [2020-12-22 13:55:31,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24654 states. [2020-12-22 13:55:32,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24654 states to 24654 states and 34844 transitions. [2020-12-22 13:55:32,012 INFO L78 Accepts]: Start accepts. Automaton has 24654 states and 34844 transitions. Word has length 216 [2020-12-22 13:55:32,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:32,012 INFO L481 AbstractCegarLoop]: Abstraction has 24654 states and 34844 transitions. [2020-12-22 13:55:32,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:55:32,013 INFO L276 IsEmpty]: Start isEmpty. Operand 24654 states and 34844 transitions. [2020-12-22 13:55:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-22 13:55:32,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:32,049 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:32,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:55:32,050 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:32,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:32,050 INFO L82 PathProgramCache]: Analyzing trace with hash -580959769, now seen corresponding path program 1 times [2020-12-22 13:55:32,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:32,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003118675] [2020-12-22 13:55:32,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:32,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:32,751 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:55:32,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003118675] [2020-12-22 13:55:32,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004788701] [2020-12-22 13:55:32,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:55:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:34,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 4039 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:55:34,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:55:34,846 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:55:34,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:55:34,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2020-12-22 13:55:34,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122967330] [2020-12-22 13:55:34,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:55:34,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:34,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:55:34,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:55:34,849 INFO L87 Difference]: Start difference. First operand 24654 states and 34844 transitions. Second operand 4 states. [2020-12-22 13:55:40,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:40,016 INFO L93 Difference]: Finished difference Result 73808 states and 104367 transitions. [2020-12-22 13:55:40,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:55:40,017 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 217 [2020-12-22 13:55:40,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:55:40,218 INFO L225 Difference]: With dead ends: 73808 [2020-12-22 13:55:40,219 INFO L226 Difference]: Without dead ends: 73804 [2020-12-22 13:55:40,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 217 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:55:40,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73804 states. [2020-12-22 13:55:43,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73804 to 73594. [2020-12-22 13:55:43,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73594 states. [2020-12-22 13:55:44,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73594 states to 73594 states and 104100 transitions. [2020-12-22 13:55:44,111 INFO L78 Accepts]: Start accepts. Automaton has 73594 states and 104100 transitions. Word has length 217 [2020-12-22 13:55:44,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:55:44,112 INFO L481 AbstractCegarLoop]: Abstraction has 73594 states and 104100 transitions. [2020-12-22 13:55:44,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:55:44,112 INFO L276 IsEmpty]: Start isEmpty. Operand 73594 states and 104100 transitions. [2020-12-22 13:55:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-12-22 13:55:44,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:55:44,185 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:55:44,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 13:55:44,400 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:55:44,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:55:44,401 INFO L82 PathProgramCache]: Analyzing trace with hash 2125659625, now seen corresponding path program 1 times [2020-12-22 13:55:44,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:55:44,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148975936] [2020-12-22 13:55:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:55:44,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:55:45,587 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:55:45,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148975936] [2020-12-22 13:55:45,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:55:45,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:55:45,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921282693] [2020-12-22 13:55:45,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:55:45,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:55:45,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:55:45,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:55:45,590 INFO L87 Difference]: Start difference. First operand 73594 states and 104100 transitions. Second operand 5 states. [2020-12-22 13:55:59,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:55:59,397 INFO L93 Difference]: Finished difference Result 350102 states and 495436 transitions. [2020-12-22 13:55:59,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:55:59,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 217 [2020-12-22 13:55:59,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:56:00,546 INFO L225 Difference]: With dead ends: 350102 [2020-12-22 13:56:00,547 INFO L226 Difference]: Without dead ends: 276586 [2020-12-22 13:56:00,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:56:01,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276586 states. [2020-12-22 13:56:06,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276586 to 73666. [2020-12-22 13:56:06,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73666 states. [2020-12-22 13:56:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73666 states to 73666 states and 104172 transitions. [2020-12-22 13:56:06,621 INFO L78 Accepts]: Start accepts. Automaton has 73666 states and 104172 transitions. Word has length 217 [2020-12-22 13:56:06,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:56:06,621 INFO L481 AbstractCegarLoop]: Abstraction has 73666 states and 104172 transitions. [2020-12-22 13:56:06,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:56:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 73666 states and 104172 transitions. [2020-12-22 13:56:06,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2020-12-22 13:56:06,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:56:06,679 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:56:06,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 13:56:06,679 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:56:06,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:56:06,680 INFO L82 PathProgramCache]: Analyzing trace with hash -768494651, now seen corresponding path program 1 times [2020-12-22 13:56:06,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:56:06,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824149793] [2020-12-22 13:56:06,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:56:06,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:56:07,186 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:56:07,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824149793] [2020-12-22 13:56:07,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:56:07,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:56:07,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332554850] [2020-12-22 13:56:07,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:56:07,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:56:07,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:56:07,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:56:07,189 INFO L87 Difference]: Start difference. First operand 73666 states and 104172 transitions. Second operand 3 states. [2020-12-22 13:56:15,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:56:15,313 INFO L93 Difference]: Finished difference Result 199914 states and 282374 transitions. [2020-12-22 13:56:15,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:56:15,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 219 [2020-12-22 13:56:15,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:56:15,546 INFO L225 Difference]: With dead ends: 199914 [2020-12-22 13:56:15,547 INFO L226 Difference]: Without dead ends: 126326 [2020-12-22 13:56:15,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:56:15,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126326 states. [2020-12-22 13:56:20,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126326 to 72514. [2020-12-22 13:56:20,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72514 states. [2020-12-22 13:56:20,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72514 states to 72514 states and 101868 transitions. [2020-12-22 13:56:20,601 INFO L78 Accepts]: Start accepts. Automaton has 72514 states and 101868 transitions. Word has length 219 [2020-12-22 13:56:20,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:56:20,601 INFO L481 AbstractCegarLoop]: Abstraction has 72514 states and 101868 transitions. [2020-12-22 13:56:20,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:56:20,601 INFO L276 IsEmpty]: Start isEmpty. Operand 72514 states and 101868 transitions. [2020-12-22 13:56:20,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2020-12-22 13:56:20,684 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:56:20,684 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:56:20,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 13:56:20,685 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:56:20,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:56:20,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1526610566, now seen corresponding path program 1 times [2020-12-22 13:56:20,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:56:20,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447260352] [2020-12-22 13:56:20,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:56:24,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:56:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-12-22 13:56:25,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447260352] [2020-12-22 13:56:25,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:56:25,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:56:25,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620687416] [2020-12-22 13:56:25,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:56:25,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:56:25,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:56:25,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:56:25,011 INFO L87 Difference]: Start difference. First operand 72514 states and 101868 transitions. Second operand 3 states. [2020-12-22 13:56:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:56:29,774 INFO L93 Difference]: Finished difference Result 144993 states and 203729 transitions. [2020-12-22 13:56:29,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:56:29,775 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 220 [2020-12-22 13:56:29,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:56:29,897 INFO L225 Difference]: With dead ends: 144993 [2020-12-22 13:56:29,897 INFO L226 Difference]: Without dead ends: 72543 [2020-12-22 13:56:29,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:56:30,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72543 states. [2020-12-22 13:56:34,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72543 to 72543. [2020-12-22 13:56:34,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72543 states. [2020-12-22 13:56:34,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72543 states to 72543 states and 101897 transitions. [2020-12-22 13:56:34,450 INFO L78 Accepts]: Start accepts. Automaton has 72543 states and 101897 transitions. Word has length 220 [2020-12-22 13:56:34,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:56:34,450 INFO L481 AbstractCegarLoop]: Abstraction has 72543 states and 101897 transitions. [2020-12-22 13:56:34,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:56:34,450 INFO L276 IsEmpty]: Start isEmpty. Operand 72543 states and 101897 transitions. [2020-12-22 13:56:34,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-12-22 13:56:34,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:56:34,495 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:56:34,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 13:56:34,495 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:56:34,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:56:34,496 INFO L82 PathProgramCache]: Analyzing trace with hash -825610109, now seen corresponding path program 1 times [2020-12-22 13:56:34,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:56:34,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759002578] [2020-12-22 13:56:34,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:56:38,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:56:38,711 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-22 13:56:38,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759002578] [2020-12-22 13:56:38,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438694307] [2020-12-22 13:56:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:56:40,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:56:40,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 4083 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 13:56:40,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:56:40,496 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:56:40,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:56:40,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2020-12-22 13:56:40,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587072238] [2020-12-22 13:56:40,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:56:40,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:56:40,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:56:40,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:56:40,498 INFO L87 Difference]: Start difference. First operand 72543 states and 101897 transitions. Second operand 4 states. [2020-12-22 13:56:56,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:56:56,809 INFO L93 Difference]: Finished difference Result 342823 states and 482025 transitions. [2020-12-22 13:56:56,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:56:56,813 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 225 [2020-12-22 13:56:56,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:56:57,537 INFO L225 Difference]: With dead ends: 342823 [2020-12-22 13:56:57,538 INFO L226 Difference]: Without dead ends: 270363 [2020-12-22 13:56:57,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:56:57,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270363 states. [2020-12-22 13:57:03,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270363 to 72591. [2020-12-22 13:57:03,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72591 states. [2020-12-22 13:57:04,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72591 states to 72591 states and 101945 transitions. [2020-12-22 13:57:04,049 INFO L78 Accepts]: Start accepts. Automaton has 72591 states and 101945 transitions. Word has length 225 [2020-12-22 13:57:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:57:04,049 INFO L481 AbstractCegarLoop]: Abstraction has 72591 states and 101945 transitions. [2020-12-22 13:57:04,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:57:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 72591 states and 101945 transitions. [2020-12-22 13:57:04,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-22 13:57:04,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:57:04,095 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:57:04,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 13:57:04,310 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:57:04,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:57:04,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1212369571, now seen corresponding path program 1 times [2020-12-22 13:57:04,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:57:04,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923641120] [2020-12-22 13:57:04,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:57:04,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:57:04,727 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:57:04,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923641120] [2020-12-22 13:57:04,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:57:04,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:57:04,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934542761] [2020-12-22 13:57:04,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:57:04,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:57:04,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:57:04,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:57:04,734 INFO L87 Difference]: Start difference. First operand 72591 states and 101945 transitions. Second operand 3 states. [2020-12-22 13:57:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:57:14,017 INFO L93 Difference]: Finished difference Result 196991 states and 276739 transitions. [2020-12-22 13:57:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:57:14,018 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 251 [2020-12-22 13:57:14,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:57:14,398 INFO L225 Difference]: With dead ends: 196991 [2020-12-22 13:57:14,398 INFO L226 Difference]: Without dead ends: 124483 [2020-12-22 13:57:14,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:57:14,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124483 states. [2020-12-22 13:57:20,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124483 to 70671. [2020-12-22 13:57:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70671 states. [2020-12-22 13:57:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70671 states to 70671 states and 98489 transitions. [2020-12-22 13:57:20,358 INFO L78 Accepts]: Start accepts. Automaton has 70671 states and 98489 transitions. Word has length 251 [2020-12-22 13:57:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:57:20,359 INFO L481 AbstractCegarLoop]: Abstraction has 70671 states and 98489 transitions. [2020-12-22 13:57:20,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:57:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 70671 states and 98489 transitions. [2020-12-22 13:57:20,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-22 13:57:20,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:57:20,403 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:57:20,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 13:57:20,404 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:57:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:57:20,404 INFO L82 PathProgramCache]: Analyzing trace with hash -267002880, now seen corresponding path program 1 times [2020-12-22 13:57:20,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:57:20,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606127084] [2020-12-22 13:57:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:57:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:57:20,854 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:57:20,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606127084] [2020-12-22 13:57:20,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:57:20,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:57:20,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282824678] [2020-12-22 13:57:20,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:57:20,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:57:20,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:57:20,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:57:20,858 INFO L87 Difference]: Start difference. First operand 70671 states and 98489 transitions. Second operand 3 states. [2020-12-22 13:57:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:57:31,109 INFO L93 Difference]: Finished difference Result 195407 states and 271759 transitions. [2020-12-22 13:57:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:57:31,111 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 251 [2020-12-22 13:57:31,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:57:31,381 INFO L225 Difference]: With dead ends: 195407 [2020-12-22 13:57:31,381 INFO L226 Difference]: Without dead ends: 124819 [2020-12-22 13:57:31,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:57:31,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124819 states.