/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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:20:20,713 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:20:20,717 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:20:20,761 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:20:20,762 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:20:20,763 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:20:20,765 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:20:20,768 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:20:20,770 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:20:20,771 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:20:20,772 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:20:20,774 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:20:20,774 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:20:20,776 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:20:20,777 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:20:20,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:20:20,779 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:20:20,780 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:20:20,794 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:20:20,798 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:20:20,803 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:20:20,808 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:20:20,810 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:20:20,811 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:20:20,817 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:20:20,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:20:20,819 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:20:20,823 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:20:20,824 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:20:20,825 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:20:20,825 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:20:20,828 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:20:20,829 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:20:20,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:20:20,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:20:20,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:20:20,833 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:20:20,833 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:20:20,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:20:20,834 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:20:20,835 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:20:20,836 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:20:20,883 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:20:20,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:20:20,885 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:20:20,885 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:20:20,885 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:20:20,885 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:20:20,886 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:20:20,886 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:20:20,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:20:20,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:20:20,886 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:20:20,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:20:20,887 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:20:20,887 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:20:20,887 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:20:20,887 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:20:20,888 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:20:20,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:20:20,888 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:20:20,888 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:20:20,888 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:20:20,889 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:20:20,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:20:20,889 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:20:20,889 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:20:20,889 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:20:21,251 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:20:21,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:20:21,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:20:21,285 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:20:21,285 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:20:21,286 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2020-12-22 13:20:21,375 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0035e316/448fbee3b41f40c68e8026bb35bc4560/FLAG46ff28a2d [2020-12-22 13:20:22,557 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:20:22,558 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2020-12-22 13:20:22,612 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0035e316/448fbee3b41f40c68e8026bb35bc4560/FLAG46ff28a2d [2020-12-22 13:20:22,958 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e0035e316/448fbee3b41f40c68e8026bb35bc4560 [2020-12-22 13:20:22,962 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:20:22,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:20:22,966 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:20:22,966 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:20:22,973 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:20:22,974 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:20:22" (1/1) ... [2020-12-22 13:20:22,975 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4459c10e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:22, skipping insertion in model container [2020-12-22 13:20:22,976 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:20:22" (1/1) ... [2020-12-22 13:20:22,985 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:20:23,108 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:20:24,319 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2020-12-22 13:20:24,771 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:20:24,789 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:20:24,972 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-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i[162928,162941] [2020-12-22 13:20:25,255 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:20:25,560 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:20:25,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:25 WrapperNode [2020-12-22 13:20:25,561 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:20:25,563 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:20:25,564 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:20:25,564 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:20:25,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:25" (1/1) ... [2020-12-22 13:20:25,675 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:25" (1/1) ... [2020-12-22 13:20:25,894 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:20:25,897 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:20:25,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:20:25,898 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:20:25,909 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:25" (1/1) ... [2020-12-22 13:20:25,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:25" (1/1) ... [2020-12-22 13:20:25,971 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:25" (1/1) ... [2020-12-22 13:20:25,971 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:25" (1/1) ... [2020-12-22 13:20:26,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:25" (1/1) ... [2020-12-22 13:20:26,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:25" (1/1) ... [2020-12-22 13:20:26,172 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:25" (1/1) ... [2020-12-22 13:20:26,207 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:20:26,209 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:20:26,209 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:20:26,209 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:20:26,211 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:25" (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 13:20:26,335 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:20:26,335 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:20:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:20:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:20:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:20:26,336 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:20:26,337 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:20:26,337 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:20:26,337 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:20:26,338 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:20:26,338 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:20:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:20:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:20:26,339 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:20:26,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:20:32,513 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:20:32,513 INFO L299 CfgBuilder]: Removed 769 assume(true) statements. [2020-12-22 13:20:32,516 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:20:32 BoogieIcfgContainer [2020-12-22 13:20:32,516 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:20:32,518 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:20:32,518 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:20:32,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:20:32,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:20:22" (1/3) ... [2020-12-22 13:20:32,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315e6ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:20:32, skipping insertion in model container [2020-12-22 13:20:32,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:20:25" (2/3) ... [2020-12-22 13:20:32,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@315e6ea6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:20:32, skipping insertion in model container [2020-12-22 13:20:32,524 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:20:32" (3/3) ... [2020-12-22 13:20:32,525 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ppp--ppp_async.ko-entry_point.cil.out.i [2020-12-22 13:20:32,531 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:20:32,536 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:20:32,554 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:20:32,589 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:20:32,589 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:20:32,589 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:20:32,589 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:20:32,589 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:20:32,590 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:20:32,590 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:20:32,590 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:20:32,634 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states. [2020-12-22 13:20:32,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 13:20:32,651 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:32,652 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] [2020-12-22 13:20:32,652 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:32,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:32,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1898451720, now seen corresponding path program 1 times [2020-12-22 13:20:32,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:32,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949166305] [2020-12-22 13:20:32,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:32,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:33,191 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 13:20:33,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949166305] [2020-12-22 13:20:33,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:33,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:20:33,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19398889] [2020-12-22 13:20:33,199 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:20:33,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:33,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:20:33,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:33,216 INFO L87 Difference]: Start difference. First operand 898 states. Second operand 3 states. [2020-12-22 13:20:33,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:33,494 INFO L93 Difference]: Finished difference Result 2608 states and 3995 transitions. [2020-12-22 13:20:33,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:20:33,500 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-12-22 13:20:33,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:33,532 INFO L225 Difference]: With dead ends: 2608 [2020-12-22 13:20:33,532 INFO L226 Difference]: Without dead ends: 1703 [2020-12-22 13:20:33,541 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 13:20:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1703 states. [2020-12-22 13:20:33,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1703 to 1703. [2020-12-22 13:20:33,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1703 states. [2020-12-22 13:20:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 2488 transitions. [2020-12-22 13:20:33,695 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 2488 transitions. Word has length 36 [2020-12-22 13:20:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:33,695 INFO L481 AbstractCegarLoop]: Abstraction has 1703 states and 2488 transitions. [2020-12-22 13:20:33,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 2488 transitions. [2020-12-22 13:20:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 13:20:33,699 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:33,699 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] [2020-12-22 13:20:33,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:20:33,700 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:33,701 INFO L82 PathProgramCache]: Analyzing trace with hash 331004688, now seen corresponding path program 1 times [2020-12-22 13:20:33,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:33,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354202741] [2020-12-22 13:20:33,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:33,909 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 13:20:33,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354202741] [2020-12-22 13:20:33,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:33,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:20:33,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031102491] [2020-12-22 13:20:33,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:20:33,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:33,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:20:33,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:20:33,914 INFO L87 Difference]: Start difference. First operand 1703 states and 2488 transitions. Second operand 5 states. [2020-12-22 13:20:34,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:34,539 INFO L93 Difference]: Finished difference Result 5001 states and 7337 transitions. [2020-12-22 13:20:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:34,541 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 13:20:34,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:34,565 INFO L225 Difference]: With dead ends: 5001 [2020-12-22 13:20:34,565 INFO L226 Difference]: Without dead ends: 3345 [2020-12-22 13:20:34,571 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:20:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3345 states. [2020-12-22 13:20:34,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3345 to 3249. [2020-12-22 13:20:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3249 states. [2020-12-22 13:20:34,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3249 states to 3249 states and 4780 transitions. [2020-12-22 13:20:34,728 INFO L78 Accepts]: Start accepts. Automaton has 3249 states and 4780 transitions. Word has length 40 [2020-12-22 13:20:34,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:34,730 INFO L481 AbstractCegarLoop]: Abstraction has 3249 states and 4780 transitions. [2020-12-22 13:20:34,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:20:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 3249 states and 4780 transitions. [2020-12-22 13:20:34,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 13:20:34,742 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:34,743 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:20:34,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:20:34,743 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:34,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:34,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1564766953, now seen corresponding path program 1 times [2020-12-22 13:20:34,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:34,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478559783] [2020-12-22 13:20:34,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:34,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:34,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:34,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478559783] [2020-12-22 13:20:34,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:34,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:20:34,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808656545] [2020-12-22 13:20:34,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:20:34,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:34,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:20:34,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:34,930 INFO L87 Difference]: Start difference. First operand 3249 states and 4780 transitions. Second operand 3 states. [2020-12-22 13:20:35,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:35,186 INFO L93 Difference]: Finished difference Result 7909 states and 11681 transitions. [2020-12-22 13:20:35,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:20:35,194 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 13:20:35,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:35,223 INFO L225 Difference]: With dead ends: 7909 [2020-12-22 13:20:35,223 INFO L226 Difference]: Without dead ends: 4713 [2020-12-22 13:20:35,232 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 13:20:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2020-12-22 13:20:35,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4693. [2020-12-22 13:20:35,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4693 states. [2020-12-22 13:20:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4693 states to 4693 states and 6938 transitions. [2020-12-22 13:20:35,487 INFO L78 Accepts]: Start accepts. Automaton has 4693 states and 6938 transitions. Word has length 69 [2020-12-22 13:20:35,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:35,488 INFO L481 AbstractCegarLoop]: Abstraction has 4693 states and 6938 transitions. [2020-12-22 13:20:35,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:35,489 INFO L276 IsEmpty]: Start isEmpty. Operand 4693 states and 6938 transitions. [2020-12-22 13:20:35,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-22 13:20:35,494 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:35,494 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:20:35,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:20:35,495 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:35,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:35,497 INFO L82 PathProgramCache]: Analyzing trace with hash 36804616, now seen corresponding path program 1 times [2020-12-22 13:20:35,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:35,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385612679] [2020-12-22 13:20:35,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:35,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:20:35,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385612679] [2020-12-22 13:20:35,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:35,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:20:35,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730876529] [2020-12-22 13:20:35,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:20:35,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:35,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:20:35,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:35,634 INFO L87 Difference]: Start difference. First operand 4693 states and 6938 transitions. Second operand 3 states. [2020-12-22 13:20:35,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:35,894 INFO L93 Difference]: Finished difference Result 11205 states and 16555 transitions. [2020-12-22 13:20:35,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:20:35,895 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 75 [2020-12-22 13:20:35,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:35,938 INFO L225 Difference]: With dead ends: 11205 [2020-12-22 13:20:35,938 INFO L226 Difference]: Without dead ends: 6565 [2020-12-22 13:20:35,951 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 13:20:35,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6565 states. [2020-12-22 13:20:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6565 to 6557. [2020-12-22 13:20:36,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6557 states. [2020-12-22 13:20:36,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6557 states to 6557 states and 9664 transitions. [2020-12-22 13:20:36,246 INFO L78 Accepts]: Start accepts. Automaton has 6557 states and 9664 transitions. Word has length 75 [2020-12-22 13:20:36,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:36,246 INFO L481 AbstractCegarLoop]: Abstraction has 6557 states and 9664 transitions. [2020-12-22 13:20:36,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:36,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6557 states and 9664 transitions. [2020-12-22 13:20:36,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-12-22 13:20:36,256 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:36,257 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:20:36,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:20:36,257 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:36,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:36,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1358903704, now seen corresponding path program 1 times [2020-12-22 13:20:36,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:36,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505252342] [2020-12-22 13:20:36,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:36,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:36,422 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 13:20:36,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505252342] [2020-12-22 13:20:36,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:36,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:20:36,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408035202] [2020-12-22 13:20:36,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:20:36,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:36,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:20:36,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:36,432 INFO L87 Difference]: Start difference. First operand 6557 states and 9664 transitions. Second operand 3 states. [2020-12-22 13:20:36,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:36,925 INFO L93 Difference]: Finished difference Result 14781 states and 21907 transitions. [2020-12-22 13:20:36,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:20:36,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 83 [2020-12-22 13:20:36,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:36,999 INFO L225 Difference]: With dead ends: 14781 [2020-12-22 13:20:36,999 INFO L226 Difference]: Without dead ends: 8277 [2020-12-22 13:20:37,013 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 13:20:37,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8277 states. [2020-12-22 13:20:37,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8277 to 8257. [2020-12-22 13:20:37,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8257 states. [2020-12-22 13:20:37,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8257 states to 8257 states and 12180 transitions. [2020-12-22 13:20:37,368 INFO L78 Accepts]: Start accepts. Automaton has 8257 states and 12180 transitions. Word has length 83 [2020-12-22 13:20:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:37,370 INFO L481 AbstractCegarLoop]: Abstraction has 8257 states and 12180 transitions. [2020-12-22 13:20:37,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 8257 states and 12180 transitions. [2020-12-22 13:20:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 13:20:37,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:37,377 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:20:37,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:20:37,378 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:37,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:37,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1475894567, now seen corresponding path program 1 times [2020-12-22 13:20:37,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:37,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942941709] [2020-12-22 13:20:37,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:37,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:37,512 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:20:37,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942941709] [2020-12-22 13:20:37,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:37,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:20:37,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562797100] [2020-12-22 13:20:37,514 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:20:37,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:37,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:20:37,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:37,515 INFO L87 Difference]: Start difference. First operand 8257 states and 12180 transitions. Second operand 3 states. [2020-12-22 13:20:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:38,214 INFO L93 Difference]: Finished difference Result 19919 states and 29468 transitions. [2020-12-22 13:20:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:20:38,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-22 13:20:38,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:38,261 INFO L225 Difference]: With dead ends: 19919 [2020-12-22 13:20:38,261 INFO L226 Difference]: Without dead ends: 15701 [2020-12-22 13:20:38,274 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 13:20:38,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15701 states. [2020-12-22 13:20:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15701 to 8369. [2020-12-22 13:20:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8369 states. [2020-12-22 13:20:38,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8369 states to 8369 states and 12292 transitions. [2020-12-22 13:20:38,772 INFO L78 Accepts]: Start accepts. Automaton has 8369 states and 12292 transitions. Word has length 84 [2020-12-22 13:20:38,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:38,773 INFO L481 AbstractCegarLoop]: Abstraction has 8369 states and 12292 transitions. [2020-12-22 13:20:38,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:38,774 INFO L276 IsEmpty]: Start isEmpty. Operand 8369 states and 12292 transitions. [2020-12-22 13:20:38,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 13:20:38,789 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:38,790 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:20:38,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:20:38,790 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:38,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:38,791 INFO L82 PathProgramCache]: Analyzing trace with hash 341292008, now seen corresponding path program 1 times [2020-12-22 13:20:38,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:38,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285249269] [2020-12-22 13:20:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:38,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:20:38,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285249269] [2020-12-22 13:20:38,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:38,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:20:38,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807709530] [2020-12-22 13:20:38,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:20:38,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:38,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:20:38,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:20:38,972 INFO L87 Difference]: Start difference. First operand 8369 states and 12292 transitions. Second operand 4 states. [2020-12-22 13:20:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:39,835 INFO L93 Difference]: Finished difference Result 20135 states and 29611 transitions. [2020-12-22 13:20:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:20:39,835 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 86 [2020-12-22 13:20:39,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:39,867 INFO L225 Difference]: With dead ends: 20135 [2020-12-22 13:20:39,867 INFO L226 Difference]: Without dead ends: 11819 [2020-12-22 13:20:39,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:20:39,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11819 states. [2020-12-22 13:20:40,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11819 to 8201. [2020-12-22 13:20:40,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8201 states. [2020-12-22 13:20:40,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8201 states to 8201 states and 11956 transitions. [2020-12-22 13:20:40,322 INFO L78 Accepts]: Start accepts. Automaton has 8201 states and 11956 transitions. Word has length 86 [2020-12-22 13:20:40,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:40,324 INFO L481 AbstractCegarLoop]: Abstraction has 8201 states and 11956 transitions. [2020-12-22 13:20:40,324 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:20:40,324 INFO L276 IsEmpty]: Start isEmpty. Operand 8201 states and 11956 transitions. [2020-12-22 13:20:40,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-12-22 13:20:40,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:40,336 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 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] [2020-12-22 13:20:40,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:20:40,336 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:40,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:40,337 INFO L82 PathProgramCache]: Analyzing trace with hash -265952138, now seen corresponding path program 1 times [2020-12-22 13:20:40,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:40,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479303886] [2020-12-22 13:20:40,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:40,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:40,469 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:20:40,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479303886] [2020-12-22 13:20:40,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:40,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:20:40,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875614873] [2020-12-22 13:20:40,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:20:40,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:40,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:20:40,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:20:40,472 INFO L87 Difference]: Start difference. First operand 8201 states and 11956 transitions. Second operand 4 states. [2020-12-22 13:20:41,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:41,032 INFO L93 Difference]: Finished difference Result 19005 states and 27638 transitions. [2020-12-22 13:20:41,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:41,033 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 119 [2020-12-22 13:20:41,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:41,058 INFO L225 Difference]: With dead ends: 19005 [2020-12-22 13:20:41,058 INFO L226 Difference]: Without dead ends: 10857 [2020-12-22 13:20:41,074 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 13:20:41,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10857 states. [2020-12-22 13:20:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10857 to 8217. [2020-12-22 13:20:41,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8217 states. [2020-12-22 13:20:41,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8217 states to 8217 states and 11972 transitions. [2020-12-22 13:20:41,460 INFO L78 Accepts]: Start accepts. Automaton has 8217 states and 11972 transitions. Word has length 119 [2020-12-22 13:20:41,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:41,460 INFO L481 AbstractCegarLoop]: Abstraction has 8217 states and 11972 transitions. [2020-12-22 13:20:41,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:20:41,460 INFO L276 IsEmpty]: Start isEmpty. Operand 8217 states and 11972 transitions. [2020-12-22 13:20:41,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 13:20:41,471 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:41,471 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 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] [2020-12-22 13:20:41,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:20:41,472 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:41,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:41,472 INFO L82 PathProgramCache]: Analyzing trace with hash 464660825, now seen corresponding path program 1 times [2020-12-22 13:20:41,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:41,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479270839] [2020-12-22 13:20:41,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:41,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:41,614 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 13:20:41,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479270839] [2020-12-22 13:20:41,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:41,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:20:41,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43570554] [2020-12-22 13:20:41,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:20:41,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:41,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:20:41,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:20:41,617 INFO L87 Difference]: Start difference. First operand 8217 states and 11972 transitions. Second operand 4 states. [2020-12-22 13:20:43,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:43,138 INFO L93 Difference]: Finished difference Result 40548 states and 59167 transitions. [2020-12-22 13:20:43,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:43,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 126 [2020-12-22 13:20:43,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:43,213 INFO L225 Difference]: With dead ends: 40548 [2020-12-22 13:20:43,214 INFO L226 Difference]: Without dead ends: 32384 [2020-12-22 13:20:43,235 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 13:20:43,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32384 states. [2020-12-22 13:20:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32384 to 8233. [2020-12-22 13:20:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8233 states. [2020-12-22 13:20:43,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8233 states to 8233 states and 11988 transitions. [2020-12-22 13:20:43,881 INFO L78 Accepts]: Start accepts. Automaton has 8233 states and 11988 transitions. Word has length 126 [2020-12-22 13:20:43,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:43,881 INFO L481 AbstractCegarLoop]: Abstraction has 8233 states and 11988 transitions. [2020-12-22 13:20:43,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:20:43,882 INFO L276 IsEmpty]: Start isEmpty. Operand 8233 states and 11988 transitions. [2020-12-22 13:20:43,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 13:20:43,893 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:43,893 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 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] [2020-12-22 13:20:43,894 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:20:43,894 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:43,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:43,895 INFO L82 PathProgramCache]: Analyzing trace with hash 772581936, now seen corresponding path program 1 times [2020-12-22 13:20:43,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:43,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420655373] [2020-12-22 13:20:43,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:43,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:44,238 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:20:44,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420655373] [2020-12-22 13:20:44,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361965037] [2020-12-22 13:20:44,239 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 13:20:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:44,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 1164 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:20:44,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:20:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:20:45,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:20:45,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2020-12-22 13:20:45,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889910768] [2020-12-22 13:20:45,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:20:45,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:45,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:20:45,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:20:45,070 INFO L87 Difference]: Start difference. First operand 8233 states and 11988 transitions. Second operand 5 states. [2020-12-22 13:20:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:46,501 INFO L93 Difference]: Finished difference Result 21501 states and 31227 transitions. [2020-12-22 13:20:46,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 13:20:46,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-12-22 13:20:46,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:46,534 INFO L225 Difference]: With dead ends: 21501 [2020-12-22 13:20:46,534 INFO L226 Difference]: Without dead ends: 13321 [2020-12-22 13:20:46,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:20:46,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13321 states. [2020-12-22 13:20:47,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13321 to 8241. [2020-12-22 13:20:47,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8241 states. [2020-12-22 13:20:47,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8241 states to 8241 states and 11996 transitions. [2020-12-22 13:20:47,139 INFO L78 Accepts]: Start accepts. Automaton has 8241 states and 11996 transitions. Word has length 129 [2020-12-22 13:20:47,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:47,139 INFO L481 AbstractCegarLoop]: Abstraction has 8241 states and 11996 transitions. [2020-12-22 13:20:47,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:20:47,140 INFO L276 IsEmpty]: Start isEmpty. Operand 8241 states and 11996 transitions. [2020-12-22 13:20:47,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 13:20:47,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:47,151 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 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] [2020-12-22 13:20:47,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 13:20:47,366 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:47,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:47,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2006158458, now seen corresponding path program 1 times [2020-12-22 13:20:47,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:47,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620832226] [2020-12-22 13:20:47,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:47,752 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:20:47,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620832226] [2020-12-22 13:20:47,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618337355] [2020-12-22 13:20:47,753 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 13:20:48,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:48,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 1506 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:20:48,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:20:48,783 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:20:48,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:20:48,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2020-12-22 13:20:48,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839660994] [2020-12-22 13:20:48,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:20:48,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:20:48,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:20:48,787 INFO L87 Difference]: Start difference. First operand 8241 states and 11996 transitions. Second operand 4 states. [2020-12-22 13:20:49,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:49,445 INFO L93 Difference]: Finished difference Result 10931 states and 15825 transitions. [2020-12-22 13:20:49,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:20:49,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 144 [2020-12-22 13:20:49,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:49,469 INFO L225 Difference]: With dead ends: 10931 [2020-12-22 13:20:49,470 INFO L226 Difference]: Without dead ends: 10923 [2020-12-22 13:20:49,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 144 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 13:20:49,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10923 states. [2020-12-22 13:20:50,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10923 to 9639. [2020-12-22 13:20:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9639 states. [2020-12-22 13:20:50,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 13997 transitions. [2020-12-22 13:20:50,196 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 13997 transitions. Word has length 144 [2020-12-22 13:20:50,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:50,196 INFO L481 AbstractCegarLoop]: Abstraction has 9639 states and 13997 transitions. [2020-12-22 13:20:50,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:20:50,196 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 13997 transitions. [2020-12-22 13:20:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 13:20:50,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:50,209 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-12-22 13:20:50,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:20:50,424 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:50,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:50,425 INFO L82 PathProgramCache]: Analyzing trace with hash -290010734, now seen corresponding path program 1 times [2020-12-22 13:20:50,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:50,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253647560] [2020-12-22 13:20:50,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:50,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:50,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 13:20:50,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253647560] [2020-12-22 13:20:50,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:50,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:20:50,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797491351] [2020-12-22 13:20:50,691 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:20:50,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:50,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:20:50,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:50,692 INFO L87 Difference]: Start difference. First operand 9639 states and 13997 transitions. Second operand 3 states. [2020-12-22 13:20:51,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:51,045 INFO L93 Difference]: Finished difference Result 14409 states and 20943 transitions. [2020-12-22 13:20:51,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:20:51,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 148 [2020-12-22 13:20:51,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:51,055 INFO L225 Difference]: With dead ends: 14409 [2020-12-22 13:20:51,056 INFO L226 Difference]: Without dead ends: 4081 [2020-12-22 13:20:51,068 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 13:20:51,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4081 states. [2020-12-22 13:20:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4081 to 4081. [2020-12-22 13:20:51,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4081 states. [2020-12-22 13:20:51,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4081 states to 4081 states and 5885 transitions. [2020-12-22 13:20:51,427 INFO L78 Accepts]: Start accepts. Automaton has 4081 states and 5885 transitions. Word has length 148 [2020-12-22 13:20:51,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:51,428 INFO L481 AbstractCegarLoop]: Abstraction has 4081 states and 5885 transitions. [2020-12-22 13:20:51,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:51,428 INFO L276 IsEmpty]: Start isEmpty. Operand 4081 states and 5885 transitions. [2020-12-22 13:20:51,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 13:20:51,435 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:51,435 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 13:20:51,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 13:20:51,436 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:51,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:51,436 INFO L82 PathProgramCache]: Analyzing trace with hash 527780847, now seen corresponding path program 1 times [2020-12-22 13:20:51,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:51,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931906731] [2020-12-22 13:20:51,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:51,980 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:20:51,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931906731] [2020-12-22 13:20:51,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:51,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 13:20:51,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564881148] [2020-12-22 13:20:51,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:20:51,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:51,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:20:51,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:20:51,984 INFO L87 Difference]: Start difference. First operand 4081 states and 5885 transitions. Second operand 7 states. [2020-12-22 13:20:55,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:55,481 INFO L93 Difference]: Finished difference Result 15553 states and 22553 transitions. [2020-12-22 13:20:55,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:20:55,482 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 156 [2020-12-22 13:20:55,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:55,500 INFO L225 Difference]: With dead ends: 15553 [2020-12-22 13:20:55,501 INFO L226 Difference]: Without dead ends: 11558 [2020-12-22 13:20:55,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:20:55,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11558 states. [2020-12-22 13:20:56,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11558 to 4111. [2020-12-22 13:20:56,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4111 states. [2020-12-22 13:20:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4111 states to 4111 states and 5915 transitions. [2020-12-22 13:20:56,022 INFO L78 Accepts]: Start accepts. Automaton has 4111 states and 5915 transitions. Word has length 156 [2020-12-22 13:20:56,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:56,023 INFO L481 AbstractCegarLoop]: Abstraction has 4111 states and 5915 transitions. [2020-12-22 13:20:56,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:20:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4111 states and 5915 transitions. [2020-12-22 13:20:56,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 13:20:56,029 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:56,030 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 13:20:56,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 13:20:56,030 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:56,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:56,031 INFO L82 PathProgramCache]: Analyzing trace with hash 972368043, now seen corresponding path program 1 times [2020-12-22 13:20:56,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:56,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358943528] [2020-12-22 13:20:56,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:56,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:56,467 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:20:56,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358943528] [2020-12-22 13:20:56,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:56,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 13:20:56,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510067093] [2020-12-22 13:20:56,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:20:56,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:56,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:20:56,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:20:56,472 INFO L87 Difference]: Start difference. First operand 4111 states and 5915 transitions. Second operand 7 states. [2020-12-22 13:20:58,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:58,595 INFO L93 Difference]: Finished difference Result 25221 states and 36317 transitions. [2020-12-22 13:20:58,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 13:20:58,596 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 158 [2020-12-22 13:20:58,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:58,622 INFO L225 Difference]: With dead ends: 25221 [2020-12-22 13:20:58,622 INFO L226 Difference]: Without dead ends: 21196 [2020-12-22 13:20:58,632 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-12-22 13:20:58,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21196 states. [2020-12-22 13:20:59,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21196 to 8180. [2020-12-22 13:20:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8180 states. [2020-12-22 13:20:59,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8180 states to 8180 states and 11763 transitions. [2020-12-22 13:20:59,318 INFO L78 Accepts]: Start accepts. Automaton has 8180 states and 11763 transitions. Word has length 158 [2020-12-22 13:20:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:59,318 INFO L481 AbstractCegarLoop]: Abstraction has 8180 states and 11763 transitions. [2020-12-22 13:20:59,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:20:59,319 INFO L276 IsEmpty]: Start isEmpty. Operand 8180 states and 11763 transitions. [2020-12-22 13:20:59,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 13:20:59,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:59,331 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 13:20:59,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 13:20:59,331 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:59,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1848387049, now seen corresponding path program 1 times [2020-12-22 13:20:59,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:59,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948708114] [2020-12-22 13:20:59,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:59,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:20:59,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948708114] [2020-12-22 13:20:59,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:59,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:20:59,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205704813] [2020-12-22 13:20:59,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:20:59,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:59,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:20:59,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:20:59,926 INFO L87 Difference]: Start difference. First operand 8180 states and 11763 transitions. Second operand 5 states. [2020-12-22 13:21:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:03,261 INFO L93 Difference]: Finished difference Result 36292 states and 52227 transitions. [2020-12-22 13:21:03,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:21:03,262 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 158 [2020-12-22 13:21:03,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:03,295 INFO L225 Difference]: With dead ends: 36292 [2020-12-22 13:21:03,296 INFO L226 Difference]: Without dead ends: 28258 [2020-12-22 13:21:03,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:21:03,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28258 states. [2020-12-22 13:21:04,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28258 to 8212. [2020-12-22 13:21:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8212 states. [2020-12-22 13:21:04,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8212 states to 8212 states and 11795 transitions. [2020-12-22 13:21:04,244 INFO L78 Accepts]: Start accepts. Automaton has 8212 states and 11795 transitions. Word has length 158 [2020-12-22 13:21:04,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:04,244 INFO L481 AbstractCegarLoop]: Abstraction has 8212 states and 11795 transitions. [2020-12-22 13:21:04,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:21:04,244 INFO L276 IsEmpty]: Start isEmpty. Operand 8212 states and 11795 transitions. [2020-12-22 13:21:04,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-12-22 13:21:04,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:04,256 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 13:21:04,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 13:21:04,256 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:04,257 INFO L82 PathProgramCache]: Analyzing trace with hash -622349658, now seen corresponding path program 1 times [2020-12-22 13:21:04,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:04,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222531160] [2020-12-22 13:21:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:05,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:05,476 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:21:05,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222531160] [2020-12-22 13:21:05,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:05,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 13:21:05,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815303888] [2020-12-22 13:21:05,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 13:21:05,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:05,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 13:21:05,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:21:05,481 INFO L87 Difference]: Start difference. First operand 8212 states and 11795 transitions. Second operand 9 states. [2020-12-22 13:21:11,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:11,225 INFO L93 Difference]: Finished difference Result 45798 states and 65907 transitions. [2020-12-22 13:21:11,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 13:21:11,226 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 158 [2020-12-22 13:21:11,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:11,273 INFO L225 Difference]: With dead ends: 45798 [2020-12-22 13:21:11,273 INFO L226 Difference]: Without dead ends: 37732 [2020-12-22 13:21:11,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-12-22 13:21:11,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37732 states. [2020-12-22 13:21:12,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37732 to 8236. [2020-12-22 13:21:12,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8236 states. [2020-12-22 13:21:12,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8236 states to 8236 states and 11811 transitions. [2020-12-22 13:21:12,629 INFO L78 Accepts]: Start accepts. Automaton has 8236 states and 11811 transitions. Word has length 158 [2020-12-22 13:21:12,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:12,629 INFO L481 AbstractCegarLoop]: Abstraction has 8236 states and 11811 transitions. [2020-12-22 13:21:12,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 13:21:12,629 INFO L276 IsEmpty]: Start isEmpty. Operand 8236 states and 11811 transitions. [2020-12-22 13:21:12,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 13:21:12,641 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:12,642 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 13:21:12,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 13:21:12,642 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:12,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1108652355, now seen corresponding path program 1 times [2020-12-22 13:21:12,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:12,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971939468] [2020-12-22 13:21:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-22 13:21:13,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971939468] [2020-12-22 13:21:13,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:13,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-12-22 13:21:13,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360387453] [2020-12-22 13:21:13,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 13:21:13,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:13,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 13:21:13,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2020-12-22 13:21:13,870 INFO L87 Difference]: Start difference. First operand 8236 states and 11811 transitions. Second operand 16 states. [2020-12-22 13:21:28,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:28,094 INFO L93 Difference]: Finished difference Result 25128 states and 36125 transitions. [2020-12-22 13:21:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 13:21:28,095 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 166 [2020-12-22 13:21:28,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:28,113 INFO L225 Difference]: With dead ends: 25128 [2020-12-22 13:21:28,114 INFO L226 Difference]: Without dead ends: 17038 [2020-12-22 13:21:28,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=1103, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 13:21:28,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17038 states. [2020-12-22 13:21:29,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17038 to 8276. [2020-12-22 13:21:29,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8276 states. [2020-12-22 13:21:29,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8276 states to 8276 states and 11859 transitions. [2020-12-22 13:21:29,506 INFO L78 Accepts]: Start accepts. Automaton has 8276 states and 11859 transitions. Word has length 166 [2020-12-22 13:21:29,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:29,507 INFO L481 AbstractCegarLoop]: Abstraction has 8276 states and 11859 transitions. [2020-12-22 13:21:29,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 13:21:29,507 INFO L276 IsEmpty]: Start isEmpty. Operand 8276 states and 11859 transitions. [2020-12-22 13:21:29,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 13:21:29,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:29,518 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 3, 3, 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] [2020-12-22 13:21:29,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 13:21:29,518 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:29,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:29,519 INFO L82 PathProgramCache]: Analyzing trace with hash 1340947775, now seen corresponding path program 1 times [2020-12-22 13:21:29,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:29,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600365707] [2020-12-22 13:21:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:29,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:31,217 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:21:31,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600365707] [2020-12-22 13:21:31,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:31,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-12-22 13:21:31,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064144153] [2020-12-22 13:21:31,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 13:21:31,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:31,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 13:21:31,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2020-12-22 13:21:31,220 INFO L87 Difference]: Start difference. First operand 8276 states and 11859 transitions. Second operand 28 states. [2020-12-22 13:21:55,738 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-12-22 13:21:57,071 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 44 [2020-12-22 13:21:57,468 WARN L197 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-12-22 13:21:59,041 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-12-22 13:22:00,449 WARN L197 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-12-22 13:22:01,648 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 68 [2020-12-22 13:22:02,194 WARN L197 SmtUtils]: Spent 369.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-12-22 13:22:02,969 WARN L197 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 80 [2020-12-22 13:22:07,697 WARN L197 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 90 [2020-12-22 13:22:09,075 WARN L197 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2020-12-22 13:22:09,587 WARN L197 SmtUtils]: Spent 451.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 100 [2020-12-22 13:22:12,225 WARN L197 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 112 [2020-12-22 13:22:12,847 WARN L197 SmtUtils]: Spent 543.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 118 [2020-12-22 13:22:15,025 WARN L197 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 130 [2020-12-22 13:22:16,976 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 43 [2020-12-22 13:22:39,299 WARN L197 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 46 [2020-12-22 13:22:41,279 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-12-22 13:22:43,655 WARN L197 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-12-22 13:22:45,341 WARN L197 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2020-12-22 13:22:46,221 WARN L197 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-12-22 13:22:46,625 WARN L197 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 60 [2020-12-22 13:22:49,368 WARN L197 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 82 [2020-12-22 13:22:50,886 WARN L197 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2020-12-22 13:22:52,266 WARN L197 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 72 [2020-12-22 13:22:54,720 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-12-22 13:23:00,016 WARN L197 SmtUtils]: Spent 460.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 92 [2020-12-22 13:23:02,899 WARN L197 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 102 [2020-12-22 13:23:05,226 WARN L197 SmtUtils]: Spent 612.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 120 [2020-12-22 13:23:05,869 WARN L197 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 94 [2020-12-22 13:23:08,960 WARN L197 SmtUtils]: Spent 547.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 104 [2020-12-22 13:23:11,023 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2020-12-22 13:23:11,849 WARN L197 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 122 [2020-12-22 13:23:16,020 WARN L197 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47