/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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:14:19,602 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:14:19,607 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:14:19,671 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:14:19,672 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:14:19,677 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:14:19,681 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:14:19,690 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:14:19,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:14:19,700 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:14:19,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:14:19,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:14:19,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:14:19,707 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:14:19,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:14:19,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:14:19,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:14:19,723 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:14:19,731 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:14:19,740 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:14:19,742 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:14:19,744 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:14:19,746 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:14:19,749 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:14:19,759 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:14:19,759 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:14:19,759 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:14:19,762 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:14:19,762 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:14:19,763 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:14:19,763 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:14:19,767 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:14:19,770 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:14:19,771 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:14:19,772 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:14:19,772 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:14:19,773 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:14:19,773 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:14:19,774 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:14:19,775 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:14:19,775 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:14:19,776 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:14:19,834 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:14:19,835 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:14:19,841 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:14:19,842 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:14:19,842 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:14:19,842 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:14:19,843 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:14:19,843 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:14:19,843 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:14:19,844 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:14:19,846 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:14:19,846 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:14:19,846 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:14:19,846 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:14:19,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:14:19,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:14:19,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:14:19,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:14:19,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:14:19,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:14:19,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:14:19,849 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:14:19,849 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:14:19,849 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:14:19,849 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:14:19,850 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:14:20,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:14:20,381 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:14:20,384 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:14:20,386 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:14:20,387 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:14:20,388 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2020-12-22 13:14:20,474 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e286575e1/188964f680104e7290599609a2ab20e7/FLAG50066b42b [2020-12-22 13:14:21,448 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:14:21,449 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2020-12-22 13:14:21,505 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e286575e1/188964f680104e7290599609a2ab20e7/FLAG50066b42b [2020-12-22 13:14:21,948 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e286575e1/188964f680104e7290599609a2ab20e7 [2020-12-22 13:14:21,951 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:14:21,955 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:14:21,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:14:21,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:14:21,964 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:14:21,966 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:14:21" (1/1) ... [2020-12-22 13:14:21,968 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6516eb39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:21, skipping insertion in model container [2020-12-22 13:14:21,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:14:21" (1/1) ... [2020-12-22 13:14:21,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:14:22,103 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:14:22,928 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2020-12-22 13:14:23,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:14:23,208 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:14:23,389 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_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i[153287,153300] [2020-12-22 13:14:23,465 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:14:23,522 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:14:23,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:23 WrapperNode [2020-12-22 13:14:23,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:14:23,525 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:14:23,525 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:14:23,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:14:23,535 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:23" (1/1) ... [2020-12-22 13:14:23,563 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:23" (1/1) ... [2020-12-22 13:14:23,625 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:14:23,626 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:14:23,627 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:14:23,627 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:14:23,642 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:23" (1/1) ... [2020-12-22 13:14:23,643 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:23" (1/1) ... [2020-12-22 13:14:23,665 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:23" (1/1) ... [2020-12-22 13:14:23,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:23" (1/1) ... [2020-12-22 13:14:23,732 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:23" (1/1) ... [2020-12-22 13:14:23,758 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:23" (1/1) ... [2020-12-22 13:14:23,767 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:23" (1/1) ... [2020-12-22 13:14:23,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:14:23,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:14:23,792 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:14:23,792 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:14:23,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:23" (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 13:14:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:14:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:14:23,935 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:14:23,935 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:14:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:14:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:14:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:14:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:14:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:14:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:14:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:14:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:14:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:14:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:14:23,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:14:25,554 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:14:25,554 INFO L299 CfgBuilder]: Removed 109 assume(true) statements. [2020-12-22 13:14:25,556 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:14:25 BoogieIcfgContainer [2020-12-22 13:14:25,557 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:14:25,559 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:14:25,559 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:14:25,563 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:14:25,563 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:14:21" (1/3) ... [2020-12-22 13:14:25,564 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b376ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:14:25, skipping insertion in model container [2020-12-22 13:14:25,564 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:14:23" (2/3) ... [2020-12-22 13:14:25,565 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b376ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:14:25, skipping insertion in model container [2020-12-22 13:14:25,565 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:14:25" (3/3) ... [2020-12-22 13:14:25,567 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_safes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--arcnet--arc-rawmode.ko-entry_point.cil.out.i [2020-12-22 13:14:25,574 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:14:25,581 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:14:25,601 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:14:25,645 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:14:25,645 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:14:25,645 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:14:25,645 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:14:25,645 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:14:25,645 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:14:25,646 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:14:25,646 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:14:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states. [2020-12-22 13:14:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 13:14:25,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:25,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:14:25,693 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:25,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:25,704 INFO L82 PathProgramCache]: Analyzing trace with hash -695882203, now seen corresponding path program 1 times [2020-12-22 13:14:25,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:25,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754283615] [2020-12-22 13:14:25,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:26,170 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 13:14:26,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754283615] [2020-12-22 13:14:26,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:26,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:14:26,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008769548] [2020-12-22 13:14:26,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:14:26,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:26,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:14:26,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:14:26,203 INFO L87 Difference]: Start difference. First operand 136 states. Second operand 3 states. [2020-12-22 13:14:26,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:26,310 INFO L93 Difference]: Finished difference Result 268 states and 399 transitions. [2020-12-22 13:14:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:14:26,315 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-12-22 13:14:26,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:26,334 INFO L225 Difference]: With dead ends: 268 [2020-12-22 13:14:26,334 INFO L226 Difference]: Without dead ends: 130 [2020-12-22 13:14:26,338 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 13:14:26,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-22 13:14:26,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2020-12-22 13:14:26,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 13:14:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 179 transitions. [2020-12-22 13:14:26,389 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 179 transitions. Word has length 18 [2020-12-22 13:14:26,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:26,390 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 179 transitions. [2020-12-22 13:14:26,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:14:26,390 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 179 transitions. [2020-12-22 13:14:26,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 13:14:26,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:26,392 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:14:26,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:14:26,393 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:26,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:26,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1963993750, now seen corresponding path program 1 times [2020-12-22 13:14:26,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:26,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693136516] [2020-12-22 13:14:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:26,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:14:26,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693136516] [2020-12-22 13:14:26,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:26,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:14:26,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9813982] [2020-12-22 13:14:26,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:14:26,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:26,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:14:26,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:14:26,582 INFO L87 Difference]: Start difference. First operand 130 states and 179 transitions. Second operand 3 states. [2020-12-22 13:14:26,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:26,659 INFO L93 Difference]: Finished difference Result 344 states and 482 transitions. [2020-12-22 13:14:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:14:26,661 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-12-22 13:14:26,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:26,665 INFO L225 Difference]: With dead ends: 344 [2020-12-22 13:14:26,665 INFO L226 Difference]: Without dead ends: 225 [2020-12-22 13:14:26,667 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 13:14:26,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-22 13:14:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2020-12-22 13:14:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-12-22 13:14:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 313 transitions. [2020-12-22 13:14:26,708 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 313 transitions. Word has length 19 [2020-12-22 13:14:26,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:26,709 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 313 transitions. [2020-12-22 13:14:26,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:14:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 313 transitions. [2020-12-22 13:14:26,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 13:14:26,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:26,712 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] [2020-12-22 13:14:26,712 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:14:26,713 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:26,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:26,714 INFO L82 PathProgramCache]: Analyzing trace with hash 717727145, now seen corresponding path program 1 times [2020-12-22 13:14:26,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:26,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143633372] [2020-12-22 13:14:26,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:14:26,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143633372] [2020-12-22 13:14:26,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:26,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:14:26,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546639572] [2020-12-22 13:14:26,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:14:26,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:26,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:14:26,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:14:26,879 INFO L87 Difference]: Start difference. First operand 225 states and 313 transitions. Second operand 3 states. [2020-12-22 13:14:26,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:26,923 INFO L93 Difference]: Finished difference Result 443 states and 619 transitions. [2020-12-22 13:14:26,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:14:26,925 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-12-22 13:14:26,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:26,928 INFO L225 Difference]: With dead ends: 443 [2020-12-22 13:14:26,928 INFO L226 Difference]: Without dead ends: 229 [2020-12-22 13:14:26,930 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 13:14:26,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-22 13:14:26,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2020-12-22 13:14:26,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-12-22 13:14:26,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 314 transitions. [2020-12-22 13:14:26,949 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 314 transitions. Word has length 25 [2020-12-22 13:14:26,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:26,949 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 314 transitions. [2020-12-22 13:14:26,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:14:26,950 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 314 transitions. [2020-12-22 13:14:26,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 13:14:26,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:26,952 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] [2020-12-22 13:14:26,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:14:26,952 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:26,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:26,953 INFO L82 PathProgramCache]: Analyzing trace with hash 693730722, now seen corresponding path program 1 times [2020-12-22 13:14:26,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:26,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847461686] [2020-12-22 13:14:26,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:14:27,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847461686] [2020-12-22 13:14:27,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146774723] [2020-12-22 13:14:27,080 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 13:14:27,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:27,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:14:27,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:27,425 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 13:14:27,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:27,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 13:14:27,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438146576] [2020-12-22 13:14:27,427 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:14:27,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:27,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:14:27,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:14:27,429 INFO L87 Difference]: Start difference. First operand 226 states and 314 transitions. Second operand 5 states. [2020-12-22 13:14:27,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:27,468 INFO L93 Difference]: Finished difference Result 448 states and 625 transitions. [2020-12-22 13:14:27,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:14:27,469 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-12-22 13:14:27,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:27,471 INFO L225 Difference]: With dead ends: 448 [2020-12-22 13:14:27,472 INFO L226 Difference]: Without dead ends: 233 [2020-12-22 13:14:27,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:14:27,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-22 13:14:27,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 230. [2020-12-22 13:14:27,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-12-22 13:14:27,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 319 transitions. [2020-12-22 13:14:27,514 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 319 transitions. Word has length 29 [2020-12-22 13:14:27,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:27,514 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 319 transitions. [2020-12-22 13:14:27,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:14:27,514 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 319 transitions. [2020-12-22 13:14:27,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-22 13:14:27,519 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:27,519 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:14:27,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:27,733 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:27,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:27,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1524412699, now seen corresponding path program 2 times [2020-12-22 13:14:27,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:27,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210431031] [2020-12-22 13:14:27,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 13:14:27,821 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210431031] [2020-12-22 13:14:27,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:27,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:14:27,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896229852] [2020-12-22 13:14:27,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:14:27,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:27,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:14:27,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:14:27,824 INFO L87 Difference]: Start difference. First operand 230 states and 319 transitions. Second operand 4 states. [2020-12-22 13:14:27,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:27,869 INFO L93 Difference]: Finished difference Result 448 states and 623 transitions. [2020-12-22 13:14:27,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:14:27,870 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-12-22 13:14:27,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:27,872 INFO L225 Difference]: With dead ends: 448 [2020-12-22 13:14:27,872 INFO L226 Difference]: Without dead ends: 229 [2020-12-22 13:14:27,873 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 13:14:27,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-22 13:14:27,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 229. [2020-12-22 13:14:27,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-12-22 13:14:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 315 transitions. [2020-12-22 13:14:27,885 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 315 transitions. Word has length 33 [2020-12-22 13:14:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:27,886 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 315 transitions. [2020-12-22 13:14:27,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:14:27,886 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 315 transitions. [2020-12-22 13:14:27,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 13:14:27,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:27,888 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:14:27,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:14:27,889 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:27,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:27,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1936677014, now seen corresponding path program 1 times [2020-12-22 13:14:27,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:27,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102828489] [2020-12-22 13:14:27,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:28,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 13:14:28,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102828489] [2020-12-22 13:14:28,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:28,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:14:28,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391965064] [2020-12-22 13:14:28,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:14:28,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:28,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:14:28,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:14:28,055 INFO L87 Difference]: Start difference. First operand 229 states and 315 transitions. Second operand 5 states. [2020-12-22 13:14:28,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:28,155 INFO L93 Difference]: Finished difference Result 663 states and 918 transitions. [2020-12-22 13:14:28,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:14:28,155 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-12-22 13:14:28,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:28,159 INFO L225 Difference]: With dead ends: 663 [2020-12-22 13:14:28,159 INFO L226 Difference]: Without dead ends: 441 [2020-12-22 13:14:28,160 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 13:14:28,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2020-12-22 13:14:28,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 433. [2020-12-22 13:14:28,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 433 states. [2020-12-22 13:14:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 599 transitions. [2020-12-22 13:14:28,183 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 599 transitions. Word has length 44 [2020-12-22 13:14:28,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:28,184 INFO L481 AbstractCegarLoop]: Abstraction has 433 states and 599 transitions. [2020-12-22 13:14:28,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:14:28,184 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 599 transitions. [2020-12-22 13:14:28,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 13:14:28,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:28,187 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:14:28,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:14:28,188 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:28,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:28,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1397398033, now seen corresponding path program 1 times [2020-12-22 13:14:28,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:28,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212549711] [2020-12-22 13:14:28,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:28,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 13:14:28,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212549711] [2020-12-22 13:14:28,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:28,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:14:28,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161120863] [2020-12-22 13:14:28,260 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:14:28,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:28,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:14:28,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:14:28,261 INFO L87 Difference]: Start difference. First operand 433 states and 599 transitions. Second operand 3 states. [2020-12-22 13:14:28,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:28,319 INFO L93 Difference]: Finished difference Result 742 states and 1025 transitions. [2020-12-22 13:14:28,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:14:28,320 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 69 [2020-12-22 13:14:28,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:28,322 INFO L225 Difference]: With dead ends: 742 [2020-12-22 13:14:28,322 INFO L226 Difference]: Without dead ends: 320 [2020-12-22 13:14:28,323 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 13:14:28,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-22 13:14:28,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 288. [2020-12-22 13:14:28,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-12-22 13:14:28,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 397 transitions. [2020-12-22 13:14:28,337 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 397 transitions. Word has length 69 [2020-12-22 13:14:28,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:28,337 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 397 transitions. [2020-12-22 13:14:28,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:14:28,338 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 397 transitions. [2020-12-22 13:14:28,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-12-22 13:14:28,339 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:28,340 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:14:28,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:14:28,340 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:28,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:28,341 INFO L82 PathProgramCache]: Analyzing trace with hash -266862051, now seen corresponding path program 2 times [2020-12-22 13:14:28,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:28,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083912136] [2020-12-22 13:14:28,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:28,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:14:28,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083912136] [2020-12-22 13:14:28,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:28,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:14:28,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695644414] [2020-12-22 13:14:28,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:14:28,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:28,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:14:28,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:14:28,439 INFO L87 Difference]: Start difference. First operand 288 states and 397 transitions. Second operand 4 states. [2020-12-22 13:14:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:28,542 INFO L93 Difference]: Finished difference Result 1184 states and 1648 transitions. [2020-12-22 13:14:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:14:28,542 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-12-22 13:14:28,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:28,548 INFO L225 Difference]: With dead ends: 1184 [2020-12-22 13:14:28,548 INFO L226 Difference]: Without dead ends: 920 [2020-12-22 13:14:28,549 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 13:14:28,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2020-12-22 13:14:28,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 292. [2020-12-22 13:14:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-22 13:14:28,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 401 transitions. [2020-12-22 13:14:28,575 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 401 transitions. Word has length 69 [2020-12-22 13:14:28,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:28,575 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 401 transitions. [2020-12-22 13:14:28,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:14:28,576 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 401 transitions. [2020-12-22 13:14:28,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 13:14:28,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:28,577 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:14:28,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:14:28,578 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:28,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:28,578 INFO L82 PathProgramCache]: Analyzing trace with hash 436367918, now seen corresponding path program 1 times [2020-12-22 13:14:28,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:28,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526555003] [2020-12-22 13:14:28,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:28,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:14:28,709 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526555003] [2020-12-22 13:14:28,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:28,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 13:14:28,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781517212] [2020-12-22 13:14:28,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 13:14:28,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:28,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 13:14:28,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:14:28,711 INFO L87 Difference]: Start difference. First operand 292 states and 401 transitions. Second operand 9 states. [2020-12-22 13:14:29,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:29,242 INFO L93 Difference]: Finished difference Result 1336 states and 1860 transitions. [2020-12-22 13:14:29,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 13:14:29,242 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-12-22 13:14:29,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:29,249 INFO L225 Difference]: With dead ends: 1336 [2020-12-22 13:14:29,249 INFO L226 Difference]: Without dead ends: 1068 [2020-12-22 13:14:29,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=137, Invalid=325, Unknown=0, NotChecked=0, Total=462 [2020-12-22 13:14:29,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1068 states. [2020-12-22 13:14:29,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1068 to 296. [2020-12-22 13:14:29,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-12-22 13:14:29,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 405 transitions. [2020-12-22 13:14:29,324 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 405 transitions. Word has length 72 [2020-12-22 13:14:29,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:29,325 INFO L481 AbstractCegarLoop]: Abstraction has 296 states and 405 transitions. [2020-12-22 13:14:29,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 13:14:29,325 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 405 transitions. [2020-12-22 13:14:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-12-22 13:14:29,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:29,331 INFO L422 BasicCegarLoop]: trace histogram [3, 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] [2020-12-22 13:14:29,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:14:29,332 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:29,333 INFO L82 PathProgramCache]: Analyzing trace with hash 224042803, now seen corresponding path program 1 times [2020-12-22 13:14:29,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:29,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542251626] [2020-12-22 13:14:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:14:29,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542251626] [2020-12-22 13:14:29,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842093831] [2020-12-22 13:14:29,479 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 13:14:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:29,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 570 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:14:29,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:29,853 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:14:29,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:29,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 13:14:29,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163957919] [2020-12-22 13:14:29,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:14:29,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:29,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:14:29,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:14:29,856 INFO L87 Difference]: Start difference. First operand 296 states and 405 transitions. Second operand 6 states. [2020-12-22 13:14:29,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:29,928 INFO L93 Difference]: Finished difference Result 582 states and 800 transitions. [2020-12-22 13:14:29,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:14:29,928 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 74 [2020-12-22 13:14:29,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:29,932 INFO L225 Difference]: With dead ends: 582 [2020-12-22 13:14:29,932 INFO L226 Difference]: Without dead ends: 310 [2020-12-22 13:14:29,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:14:29,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-12-22 13:14:29,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 304. [2020-12-22 13:14:29,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 304 states. [2020-12-22 13:14:29,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 415 transitions. [2020-12-22 13:14:29,964 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 415 transitions. Word has length 74 [2020-12-22 13:14:29,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:29,965 INFO L481 AbstractCegarLoop]: Abstraction has 304 states and 415 transitions. [2020-12-22 13:14:29,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:14:29,965 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 415 transitions. [2020-12-22 13:14:29,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-12-22 13:14:29,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:29,966 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:14:30,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 13:14:30,181 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:30,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:30,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1869626458, now seen corresponding path program 2 times [2020-12-22 13:14:30,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:30,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18835037] [2020-12-22 13:14:30,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:14:30,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18835037] [2020-12-22 13:14:30,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082582603] [2020-12-22 13:14:30,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:30,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:14:30,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:30,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:14:30,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:30,729 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:14:30,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:30,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 13:14:30,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315091809] [2020-12-22 13:14:30,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:14:30,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:30,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:14:30,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:14:30,732 INFO L87 Difference]: Start difference. First operand 304 states and 415 transitions. Second operand 7 states. [2020-12-22 13:14:30,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:30,801 INFO L93 Difference]: Finished difference Result 598 states and 820 transitions. [2020-12-22 13:14:30,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:14:30,801 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 78 [2020-12-22 13:14:30,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:30,804 INFO L225 Difference]: With dead ends: 598 [2020-12-22 13:14:30,804 INFO L226 Difference]: Without dead ends: 318 [2020-12-22 13:14:30,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:14:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-22 13:14:30,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 312. [2020-12-22 13:14:30,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-12-22 13:14:30,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 425 transitions. [2020-12-22 13:14:30,834 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 425 transitions. Word has length 78 [2020-12-22 13:14:30,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:30,834 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 425 transitions. [2020-12-22 13:14:30,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:14:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 425 transitions. [2020-12-22 13:14:30,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-12-22 13:14:30,842 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:30,842 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-12-22 13:14:31,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 13:14:31,056 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:31,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:31,057 INFO L82 PathProgramCache]: Analyzing trace with hash 1704259073, now seen corresponding path program 3 times [2020-12-22 13:14:31,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:31,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369473328] [2020-12-22 13:14:31,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:14:31,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369473328] [2020-12-22 13:14:31,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163281221] [2020-12-22 13:14:31,173 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:31,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:14:31,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:31,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 40 conjunts are in the unsatisfiable core [2020-12-22 13:14:31,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:31,824 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 13:14:31,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:14:31,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [7] total 16 [2020-12-22 13:14:31,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967831591] [2020-12-22 13:14:31,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 13:14:31,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:31,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 13:14:31,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-12-22 13:14:31,827 INFO L87 Difference]: Start difference. First operand 312 states and 425 transitions. Second operand 11 states. [2020-12-22 13:14:32,764 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-12-22 13:14:32,926 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 54 [2020-12-22 13:14:33,639 WARN L197 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-12-22 13:14:33,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:33,761 INFO L93 Difference]: Finished difference Result 1554 states and 2156 transitions. [2020-12-22 13:14:33,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 13:14:33,761 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 82 [2020-12-22 13:14:33,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:33,768 INFO L225 Difference]: With dead ends: 1554 [2020-12-22 13:14:33,768 INFO L226 Difference]: Without dead ends: 1266 [2020-12-22 13:14:33,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=240, Invalid=816, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 13:14:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1266 states. [2020-12-22 13:14:33,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1266 to 326. [2020-12-22 13:14:33,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 326 states. [2020-12-22 13:14:33,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 439 transitions. [2020-12-22 13:14:33,819 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 439 transitions. Word has length 82 [2020-12-22 13:14:33,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:33,819 INFO L481 AbstractCegarLoop]: Abstraction has 326 states and 439 transitions. [2020-12-22 13:14:33,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 13:14:33,820 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 439 transitions. [2020-12-22 13:14:33,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 13:14:33,821 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:33,821 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-12-22 13:14:34,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:34,032 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:34,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:34,033 INFO L82 PathProgramCache]: Analyzing trace with hash -50304368, now seen corresponding path program 1 times [2020-12-22 13:14:34,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:34,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134150270] [2020-12-22 13:14:34,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:34,120 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 13:14:34,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134150270] [2020-12-22 13:14:34,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:34,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:14:34,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162132252] [2020-12-22 13:14:34,121 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:14:34,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:34,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:14:34,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:14:34,122 INFO L87 Difference]: Start difference. First operand 326 states and 439 transitions. Second operand 3 states. [2020-12-22 13:14:34,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:34,197 INFO L93 Difference]: Finished difference Result 769 states and 1039 transitions. [2020-12-22 13:14:34,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:14:34,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 91 [2020-12-22 13:14:34,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:34,201 INFO L225 Difference]: With dead ends: 769 [2020-12-22 13:14:34,202 INFO L226 Difference]: Without dead ends: 613 [2020-12-22 13:14:34,203 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 13:14:34,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2020-12-22 13:14:34,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 328. [2020-12-22 13:14:34,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-12-22 13:14:34,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 441 transitions. [2020-12-22 13:14:34,250 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 441 transitions. Word has length 91 [2020-12-22 13:14:34,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:34,250 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 441 transitions. [2020-12-22 13:14:34,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:14:34,250 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 441 transitions. [2020-12-22 13:14:34,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-12-22 13:14:34,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:34,252 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-12-22 13:14:34,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 13:14:34,252 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:34,253 INFO L82 PathProgramCache]: Analyzing trace with hash 701515087, now seen corresponding path program 1 times [2020-12-22 13:14:34,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:34,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304242390] [2020-12-22 13:14:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:34,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:34,408 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-22 13:14:34,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304242390] [2020-12-22 13:14:34,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:34,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:14:34,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547681091] [2020-12-22 13:14:34,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:14:34,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:34,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:14:34,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:14:34,411 INFO L87 Difference]: Start difference. First operand 328 states and 441 transitions. Second operand 4 states. [2020-12-22 13:14:34,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:34,514 INFO L93 Difference]: Finished difference Result 767 states and 1034 transitions. [2020-12-22 13:14:34,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:14:34,515 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-12-22 13:14:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:34,518 INFO L225 Difference]: With dead ends: 767 [2020-12-22 13:14:34,518 INFO L226 Difference]: Without dead ends: 463 [2020-12-22 13:14:34,520 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 13:14:34,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-12-22 13:14:34,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 325. [2020-12-22 13:14:34,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 325 states. [2020-12-22 13:14:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 435 transitions. [2020-12-22 13:14:34,561 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 435 transitions. Word has length 93 [2020-12-22 13:14:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:34,562 INFO L481 AbstractCegarLoop]: Abstraction has 325 states and 435 transitions. [2020-12-22 13:14:34,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:14:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 435 transitions. [2020-12-22 13:14:34,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-12-22 13:14:34,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:34,564 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-12-22 13:14:34,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 13:14:34,564 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:34,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:34,565 INFO L82 PathProgramCache]: Analyzing trace with hash -2044373249, now seen corresponding path program 1 times [2020-12-22 13:14:34,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:34,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288589070] [2020-12-22 13:14:34,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:34,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:34,705 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:14:34,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288589070] [2020-12-22 13:14:34,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717401422] [2020-12-22 13:14:34,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:35,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 736 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:14:35,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 7 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:14:35,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:35,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 13:14:35,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943768987] [2020-12-22 13:14:35,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:14:35,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:35,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:14:35,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:14:35,111 INFO L87 Difference]: Start difference. First operand 325 states and 435 transitions. Second operand 8 states. [2020-12-22 13:14:35,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:35,218 INFO L93 Difference]: Finished difference Result 640 states and 860 transitions. [2020-12-22 13:14:35,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:14:35,219 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 97 [2020-12-22 13:14:35,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:35,221 INFO L225 Difference]: With dead ends: 640 [2020-12-22 13:14:35,222 INFO L226 Difference]: Without dead ends: 339 [2020-12-22 13:14:35,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:14:35,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-22 13:14:35,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 333. [2020-12-22 13:14:35,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-12-22 13:14:35,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 445 transitions. [2020-12-22 13:14:35,289 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 445 transitions. Word has length 97 [2020-12-22 13:14:35,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:35,289 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 445 transitions. [2020-12-22 13:14:35,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:14:35,290 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 445 transitions. [2020-12-22 13:14:35,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 13:14:35,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:35,292 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2020-12-22 13:14:35,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 13:14:35,506 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:35,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:35,507 INFO L82 PathProgramCache]: Analyzing trace with hash -179577352, now seen corresponding path program 2 times [2020-12-22 13:14:35,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:35,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595009191] [2020-12-22 13:14:35,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:35,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:35,676 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:14:35,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595009191] [2020-12-22 13:14:35,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416073831] [2020-12-22 13:14:35,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:35,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:14:35,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:35,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 748 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 13:14:35,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 45 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:14:36,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:36,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 13:14:36,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429832468] [2020-12-22 13:14:36,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 13:14:36,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:36,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 13:14:36,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:14:36,087 INFO L87 Difference]: Start difference. First operand 333 states and 445 transitions. Second operand 9 states. [2020-12-22 13:14:36,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:36,196 INFO L93 Difference]: Finished difference Result 656 states and 880 transitions. [2020-12-22 13:14:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:14:36,196 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 101 [2020-12-22 13:14:36,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:36,199 INFO L225 Difference]: With dead ends: 656 [2020-12-22 13:14:36,199 INFO L226 Difference]: Without dead ends: 347 [2020-12-22 13:14:36,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:14:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-22 13:14:36,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 341. [2020-12-22 13:14:36,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-12-22 13:14:36,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 455 transitions. [2020-12-22 13:14:36,241 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 455 transitions. Word has length 101 [2020-12-22 13:14:36,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:36,241 INFO L481 AbstractCegarLoop]: Abstraction has 341 states and 455 transitions. [2020-12-22 13:14:36,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 13:14:36,241 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 455 transitions. [2020-12-22 13:14:36,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-22 13:14:36,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:36,243 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2020-12-22 13:14:36,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:36,459 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:36,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:36,460 INFO L82 PathProgramCache]: Analyzing trace with hash -814464911, now seen corresponding path program 3 times [2020-12-22 13:14:36,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:36,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980244118] [2020-12-22 13:14:36,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-22 13:14:36,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980244118] [2020-12-22 13:14:36,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132410028] [2020-12-22 13:14:36,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:37,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:14:37,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:37,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:14:37,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-22 13:14:37,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:14:37,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [9] total 12 [2020-12-22 13:14:37,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765070271] [2020-12-22 13:14:37,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:14:37,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:37,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:14:37,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:14:37,239 INFO L87 Difference]: Start difference. First operand 341 states and 455 transitions. Second operand 5 states. [2020-12-22 13:14:37,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:37,459 INFO L93 Difference]: Finished difference Result 996 states and 1337 transitions. [2020-12-22 13:14:37,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:14:37,460 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 105 [2020-12-22 13:14:37,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:37,465 INFO L225 Difference]: With dead ends: 996 [2020-12-22 13:14:37,466 INFO L226 Difference]: Without dead ends: 831 [2020-12-22 13:14:37,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:14:37,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 831 states. [2020-12-22 13:14:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 831 to 656. [2020-12-22 13:14:37,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 656 states. [2020-12-22 13:14:37,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 884 transitions. [2020-12-22 13:14:37,561 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 884 transitions. Word has length 105 [2020-12-22 13:14:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:37,561 INFO L481 AbstractCegarLoop]: Abstraction has 656 states and 884 transitions. [2020-12-22 13:14:37,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:14:37,562 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 884 transitions. [2020-12-22 13:14:37,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-12-22 13:14:37,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:37,564 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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 13:14:37,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 13:14:37,779 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:37,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:37,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1140772078, now seen corresponding path program 1 times [2020-12-22 13:14:37,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:37,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090590772] [2020-12-22 13:14:37,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:37,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:37,888 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2020-12-22 13:14:37,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090590772] [2020-12-22 13:14:37,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:14:37,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:14:37,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749172798] [2020-12-22 13:14:37,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:14:37,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:37,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:14:37,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:14:37,890 INFO L87 Difference]: Start difference. First operand 656 states and 884 transitions. Second operand 4 states. [2020-12-22 13:14:38,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:38,139 INFO L93 Difference]: Finished difference Result 1967 states and 2657 transitions. [2020-12-22 13:14:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:14:38,140 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 107 [2020-12-22 13:14:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:38,149 INFO L225 Difference]: With dead ends: 1967 [2020-12-22 13:14:38,150 INFO L226 Difference]: Without dead ends: 1487 [2020-12-22 13:14:38,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 13:14:38,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2020-12-22 13:14:38,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 668. [2020-12-22 13:14:38,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 668 states. [2020-12-22 13:14:38,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 668 states to 668 states and 901 transitions. [2020-12-22 13:14:38,263 INFO L78 Accepts]: Start accepts. Automaton has 668 states and 901 transitions. Word has length 107 [2020-12-22 13:14:38,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:38,264 INFO L481 AbstractCegarLoop]: Abstraction has 668 states and 901 transitions. [2020-12-22 13:14:38,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:14:38,264 INFO L276 IsEmpty]: Start isEmpty. Operand 668 states and 901 transitions. [2020-12-22 13:14:38,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-12-22 13:14:38,266 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:38,266 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 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] [2020-12-22 13:14:38,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 13:14:38,266 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:38,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:38,267 INFO L82 PathProgramCache]: Analyzing trace with hash -59309159, now seen corresponding path program 1 times [2020-12-22 13:14:38,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:38,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24166240] [2020-12-22 13:14:38,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:38,414 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:14:38,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24166240] [2020-12-22 13:14:38,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534447448] [2020-12-22 13:14:38,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:38,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:38,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 769 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 13:14:38,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:38,793 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 7 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:14:38,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:38,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 13:14:38,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452357438] [2020-12-22 13:14:38,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:14:38,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:38,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:14:38,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:14:38,796 INFO L87 Difference]: Start difference. First operand 668 states and 901 transitions. Second operand 10 states. [2020-12-22 13:14:38,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:38,949 INFO L93 Difference]: Finished difference Result 1340 states and 1812 transitions. [2020-12-22 13:14:38,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 13:14:38,949 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 109 [2020-12-22 13:14:38,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:38,953 INFO L225 Difference]: With dead ends: 1340 [2020-12-22 13:14:38,954 INFO L226 Difference]: Without dead ends: 696 [2020-12-22 13:14:38,955 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:14:38,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-12-22 13:14:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 684. [2020-12-22 13:14:39,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2020-12-22 13:14:39,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 921 transitions. [2020-12-22 13:14:39,038 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 921 transitions. Word has length 109 [2020-12-22 13:14:39,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:39,038 INFO L481 AbstractCegarLoop]: Abstraction has 684 states and 921 transitions. [2020-12-22 13:14:39,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:14:39,038 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 921 transitions. [2020-12-22 13:14:39,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 13:14:39,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:39,040 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 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] [2020-12-22 13:14:39,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:39,253 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:39,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1970658578, now seen corresponding path program 2 times [2020-12-22 13:14:39,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:39,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563332634] [2020-12-22 13:14:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:14:39,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563332634] [2020-12-22 13:14:39,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577482382] [2020-12-22 13:14:39,500 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:39,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:14:39,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:39,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 781 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 13:14:39,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:39,939 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 7 proven. 91 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:14:39,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:39,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 13:14:39,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545279305] [2020-12-22 13:14:39,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 13:14:39,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:39,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 13:14:39,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:14:39,941 INFO L87 Difference]: Start difference. First operand 684 states and 921 transitions. Second operand 11 states. [2020-12-22 13:14:40,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:40,114 INFO L93 Difference]: Finished difference Result 1372 states and 1852 transitions. [2020-12-22 13:14:40,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 13:14:40,115 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 113 [2020-12-22 13:14:40,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:40,119 INFO L225 Difference]: With dead ends: 1372 [2020-12-22 13:14:40,119 INFO L226 Difference]: Without dead ends: 712 [2020-12-22 13:14:40,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:14:40,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2020-12-22 13:14:40,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 700. [2020-12-22 13:14:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 700 states. [2020-12-22 13:14:40,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 700 states to 700 states and 941 transitions. [2020-12-22 13:14:40,216 INFO L78 Accepts]: Start accepts. Automaton has 700 states and 941 transitions. Word has length 113 [2020-12-22 13:14:40,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:40,216 INFO L481 AbstractCegarLoop]: Abstraction has 700 states and 941 transitions. [2020-12-22 13:14:40,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 13:14:40,217 INFO L276 IsEmpty]: Start isEmpty. Operand 700 states and 941 transitions. [2020-12-22 13:14:40,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 13:14:40,218 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:40,219 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2020-12-22 13:14:40,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:40,435 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:40,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:40,436 INFO L82 PathProgramCache]: Analyzing trace with hash 940134923, now seen corresponding path program 3 times [2020-12-22 13:14:40,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:40,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883090912] [2020-12-22 13:14:40,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:40,649 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:14:40,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883090912] [2020-12-22 13:14:40,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951413964] [2020-12-22 13:14:40,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:40,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:14:40,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:40,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 13:14:40,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2020-12-22 13:14:41,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:14:41,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 12 [2020-12-22 13:14:41,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27661499] [2020-12-22 13:14:41,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:14:41,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:41,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:14:41,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:14:41,113 INFO L87 Difference]: Start difference. First operand 700 states and 941 transitions. Second operand 3 states. [2020-12-22 13:14:41,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:41,267 INFO L93 Difference]: Finished difference Result 1770 states and 2391 transitions. [2020-12-22 13:14:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:14:41,268 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 117 [2020-12-22 13:14:41,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:41,274 INFO L225 Difference]: With dead ends: 1770 [2020-12-22 13:14:41,274 INFO L226 Difference]: Without dead ends: 1094 [2020-12-22 13:14:41,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:14:41,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2020-12-22 13:14:41,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 688. [2020-12-22 13:14:41,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 688 states. [2020-12-22 13:14:41,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 917 transitions. [2020-12-22 13:14:41,384 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 917 transitions. Word has length 117 [2020-12-22 13:14:41,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:41,384 INFO L481 AbstractCegarLoop]: Abstraction has 688 states and 917 transitions. [2020-12-22 13:14:41,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:14:41,384 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 917 transitions. [2020-12-22 13:14:41,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-12-22 13:14:41,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:41,386 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 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] [2020-12-22 13:14:41,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:41,600 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:41,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:41,602 INFO L82 PathProgramCache]: Analyzing trace with hash 985978379, now seen corresponding path program 1 times [2020-12-22 13:14:41,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:41,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144296249] [2020-12-22 13:14:41,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:14:41,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144296249] [2020-12-22 13:14:41,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429923932] [2020-12-22 13:14:41,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:42,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 793 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 13:14:42,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 7 proven. 120 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:14:42,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:42,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 13:14:42,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791002157] [2020-12-22 13:14:42,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 13:14:42,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:42,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 13:14:42,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:14:42,325 INFO L87 Difference]: Start difference. First operand 688 states and 917 transitions. Second operand 12 states. [2020-12-22 13:14:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:42,557 INFO L93 Difference]: Finished difference Result 1380 states and 1844 transitions. [2020-12-22 13:14:42,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 13:14:42,558 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 117 [2020-12-22 13:14:42,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:42,563 INFO L225 Difference]: With dead ends: 1380 [2020-12-22 13:14:42,563 INFO L226 Difference]: Without dead ends: 716 [2020-12-22 13:14:42,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:14:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-12-22 13:14:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 704. [2020-12-22 13:14:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 704 states. [2020-12-22 13:14:42,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 937 transitions. [2020-12-22 13:14:42,669 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 937 transitions. Word has length 117 [2020-12-22 13:14:42,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:42,670 INFO L481 AbstractCegarLoop]: Abstraction has 704 states and 937 transitions. [2020-12-22 13:14:42,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 13:14:42,670 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 937 transitions. [2020-12-22 13:14:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 13:14:42,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:42,672 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 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] [2020-12-22 13:14:42,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 13:14:42,886 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:42,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:42,887 INFO L82 PathProgramCache]: Analyzing trace with hash -332192124, now seen corresponding path program 2 times [2020-12-22 13:14:42,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:42,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921702437] [2020-12-22 13:14:42,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:42,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 7 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:14:43,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921702437] [2020-12-22 13:14:43,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050459031] [2020-12-22 13:14:43,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:43,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:14:43,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:43,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 805 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 13:14:43,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:43,607 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 7 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:14:43,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:43,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 13:14:43,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985326424] [2020-12-22 13:14:43,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 13:14:43,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:43,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 13:14:43,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:14:43,610 INFO L87 Difference]: Start difference. First operand 704 states and 937 transitions. Second operand 13 states. [2020-12-22 13:14:43,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:43,825 INFO L93 Difference]: Finished difference Result 1412 states and 1884 transitions. [2020-12-22 13:14:43,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 13:14:43,826 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 121 [2020-12-22 13:14:43,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:43,831 INFO L225 Difference]: With dead ends: 1412 [2020-12-22 13:14:43,831 INFO L226 Difference]: Without dead ends: 732 [2020-12-22 13:14:43,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:14:43,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2020-12-22 13:14:43,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 720. [2020-12-22 13:14:43,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 720 states. [2020-12-22 13:14:43,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 957 transitions. [2020-12-22 13:14:43,938 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 957 transitions. Word has length 121 [2020-12-22 13:14:43,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:43,939 INFO L481 AbstractCegarLoop]: Abstraction has 720 states and 957 transitions. [2020-12-22 13:14:43,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 13:14:43,939 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 957 transitions. [2020-12-22 13:14:43,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-12-22 13:14:43,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:43,941 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2020-12-22 13:14:44,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:44,154 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:44,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:44,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1532849539, now seen corresponding path program 3 times [2020-12-22 13:14:44,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:44,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022259903] [2020-12-22 13:14:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:44,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:44,406 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:14:44,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022259903] [2020-12-22 13:14:44,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440383905] [2020-12-22 13:14:44,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:44,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:14:44,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:44,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:14:44,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:44,897 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2020-12-22 13:14:44,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:14:44,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [13] total 15 [2020-12-22 13:14:44,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116244571] [2020-12-22 13:14:44,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:14:44,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:44,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:14:44,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-12-22 13:14:44,900 INFO L87 Difference]: Start difference. First operand 720 states and 957 transitions. Second operand 4 states. [2020-12-22 13:14:45,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:45,137 INFO L93 Difference]: Finished difference Result 1858 states and 2491 transitions. [2020-12-22 13:14:45,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:14:45,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 125 [2020-12-22 13:14:45,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:45,145 INFO L225 Difference]: With dead ends: 1858 [2020-12-22 13:14:45,145 INFO L226 Difference]: Without dead ends: 1162 [2020-12-22 13:14:45,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-12-22 13:14:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-12-22 13:14:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 724. [2020-12-22 13:14:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 724 states. [2020-12-22 13:14:45,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 961 transitions. [2020-12-22 13:14:45,301 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 961 transitions. Word has length 125 [2020-12-22 13:14:45,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:45,302 INFO L481 AbstractCegarLoop]: Abstraction has 724 states and 961 transitions. [2020-12-22 13:14:45,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:14:45,302 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 961 transitions. [2020-12-22 13:14:45,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 13:14:45,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:45,304 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 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] [2020-12-22 13:14:45,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 13:14:45,519 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:45,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:45,520 INFO L82 PathProgramCache]: Analyzing trace with hash -101611800, now seen corresponding path program 1 times [2020-12-22 13:14:45,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:45,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229410400] [2020-12-22 13:14:45,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:45,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:14:45,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229410400] [2020-12-22 13:14:45,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853233903] [2020-12-22 13:14:45,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:46,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:46,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 845 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 13:14:46,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:46,178 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 7 proven. 190 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:14:46,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:46,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 13:14:46,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029029630] [2020-12-22 13:14:46,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 13:14:46,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:46,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 13:14:46,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:14:46,181 INFO L87 Difference]: Start difference. First operand 724 states and 961 transitions. Second operand 14 states. [2020-12-22 13:14:46,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:46,375 INFO L93 Difference]: Finished difference Result 1452 states and 1932 transitions. [2020-12-22 13:14:46,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 13:14:46,375 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 126 [2020-12-22 13:14:46,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:46,380 INFO L225 Difference]: With dead ends: 1452 [2020-12-22 13:14:46,380 INFO L226 Difference]: Without dead ends: 752 [2020-12-22 13:14:46,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:14:46,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2020-12-22 13:14:46,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 740. [2020-12-22 13:14:46,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 740 states. [2020-12-22 13:14:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 981 transitions. [2020-12-22 13:14:46,486 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 981 transitions. Word has length 126 [2020-12-22 13:14:46,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:46,486 INFO L481 AbstractCegarLoop]: Abstraction has 740 states and 981 transitions. [2020-12-22 13:14:46,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 13:14:46,486 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 981 transitions. [2020-12-22 13:14:46,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 13:14:46,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:46,488 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 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] [2020-12-22 13:14:46,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:46,702 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:46,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:46,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1850977935, now seen corresponding path program 2 times [2020-12-22 13:14:46,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:46,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683944626] [2020-12-22 13:14:46,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:47,029 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 7 proven. 231 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:14:47,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683944626] [2020-12-22 13:14:47,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736274930] [2020-12-22 13:14:47,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:47,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:14:47,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 13:14:47,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:47,510 INFO L134 CoverageAnalysis]: Checked inductivity of 244 backedges. 7 proven. 231 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:14:47,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:47,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 13:14:47,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717931104] [2020-12-22 13:14:47,511 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 13:14:47,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:47,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 13:14:47,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 13:14:47,512 INFO L87 Difference]: Start difference. First operand 740 states and 981 transitions. Second operand 15 states. [2020-12-22 13:14:47,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:47,737 INFO L93 Difference]: Finished difference Result 1484 states and 1972 transitions. [2020-12-22 13:14:47,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 13:14:47,738 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 130 [2020-12-22 13:14:47,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:47,743 INFO L225 Difference]: With dead ends: 1484 [2020-12-22 13:14:47,743 INFO L226 Difference]: Without dead ends: 768 [2020-12-22 13:14:47,745 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 13:14:47,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-12-22 13:14:47,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 756. [2020-12-22 13:14:47,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 756 states. [2020-12-22 13:14:47,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1001 transitions. [2020-12-22 13:14:47,870 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1001 transitions. Word has length 130 [2020-12-22 13:14:47,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:47,871 INFO L481 AbstractCegarLoop]: Abstraction has 756 states and 1001 transitions. [2020-12-22 13:14:47,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 13:14:47,871 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1001 transitions. [2020-12-22 13:14:47,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 13:14:47,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:47,873 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 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] [2020-12-22 13:14:48,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 13:14:48,087 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:48,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:48,088 INFO L82 PathProgramCache]: Analyzing trace with hash 276540086, now seen corresponding path program 3 times [2020-12-22 13:14:48,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:48,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703421809] [2020-12-22 13:14:48,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:48,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:48,348 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:14:48,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703421809] [2020-12-22 13:14:48,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150253930] [2020-12-22 13:14:48,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:48,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:14:48,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:48,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 604 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 13:14:48,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:48,898 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2020-12-22 13:14:48,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:14:48,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [15] total 18 [2020-12-22 13:14:48,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187257749] [2020-12-22 13:14:48,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:14:48,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:48,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:14:48,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2020-12-22 13:14:48,901 INFO L87 Difference]: Start difference. First operand 756 states and 1001 transitions. Second operand 5 states. [2020-12-22 13:14:49,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:49,166 INFO L93 Difference]: Finished difference Result 2141 states and 2851 transitions. [2020-12-22 13:14:49,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:14:49,166 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-12-22 13:14:49,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:49,174 INFO L225 Difference]: With dead ends: 2141 [2020-12-22 13:14:49,174 INFO L226 Difference]: Without dead ends: 1409 [2020-12-22 13:14:49,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-12-22 13:14:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2020-12-22 13:14:49,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 760. [2020-12-22 13:14:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 760 states. [2020-12-22 13:14:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1005 transitions. [2020-12-22 13:14:49,293 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1005 transitions. Word has length 134 [2020-12-22 13:14:49,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:49,293 INFO L481 AbstractCegarLoop]: Abstraction has 760 states and 1005 transitions. [2020-12-22 13:14:49,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:14:49,293 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1005 transitions. [2020-12-22 13:14:49,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 13:14:49,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:49,296 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 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] [2020-12-22 13:14:49,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 13:14:49,510 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:49,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:49,511 INFO L82 PathProgramCache]: Analyzing trace with hash -803092591, now seen corresponding path program 1 times [2020-12-22 13:14:49,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:49,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458648315] [2020-12-22 13:14:49,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:49,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:49,777 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 13:14:49,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458648315] [2020-12-22 13:14:49,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631948524] [2020-12-22 13:14:49,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:50,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:50,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 879 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 13:14:50,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:50,383 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 7 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 13:14:50,383 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:50,383 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 13:14:50,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001444696] [2020-12-22 13:14:50,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 13:14:50,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:50,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 13:14:50,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 13:14:50,387 INFO L87 Difference]: Start difference. First operand 760 states and 1005 transitions. Second operand 16 states. [2020-12-22 13:14:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:50,649 INFO L93 Difference]: Finished difference Result 1524 states and 2020 transitions. [2020-12-22 13:14:50,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 13:14:50,650 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 135 [2020-12-22 13:14:50,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:50,655 INFO L225 Difference]: With dead ends: 1524 [2020-12-22 13:14:50,655 INFO L226 Difference]: Without dead ends: 788 [2020-12-22 13:14:50,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-12-22 13:14:50,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-12-22 13:14:50,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 776. [2020-12-22 13:14:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-12-22 13:14:50,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1025 transitions. [2020-12-22 13:14:50,792 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1025 transitions. Word has length 135 [2020-12-22 13:14:50,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:50,793 INFO L481 AbstractCegarLoop]: Abstraction has 776 states and 1025 transitions. [2020-12-22 13:14:50,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 13:14:50,793 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1025 transitions. [2020-12-22 13:14:50,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-12-22 13:14:50,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:50,795 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 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] [2020-12-22 13:14:51,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 13:14:51,011 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:51,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:51,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1239135286, now seen corresponding path program 2 times [2020-12-22 13:14:51,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:51,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63859982] [2020-12-22 13:14:51,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:51,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:51,334 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 7 proven. 325 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 13:14:51,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63859982] [2020-12-22 13:14:51,335 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613097199] [2020-12-22 13:14:51,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:51,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:14:51,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:51,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 891 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 13:14:51,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 7 proven. 325 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 13:14:51,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:51,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 13:14:51,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885454540] [2020-12-22 13:14:51,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 13:14:51,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:51,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 13:14:51,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 13:14:51,815 INFO L87 Difference]: Start difference. First operand 776 states and 1025 transitions. Second operand 17 states. [2020-12-22 13:14:52,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:52,104 INFO L93 Difference]: Finished difference Result 1556 states and 2060 transitions. [2020-12-22 13:14:52,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 13:14:52,105 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 139 [2020-12-22 13:14:52,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:52,110 INFO L225 Difference]: With dead ends: 1556 [2020-12-22 13:14:52,110 INFO L226 Difference]: Without dead ends: 804 [2020-12-22 13:14:52,114 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-12-22 13:14:52,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2020-12-22 13:14:52,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 792. [2020-12-22 13:14:52,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-12-22 13:14:52,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1045 transitions. [2020-12-22 13:14:52,236 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1045 transitions. Word has length 139 [2020-12-22 13:14:52,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:52,237 INFO L481 AbstractCegarLoop]: Abstraction has 792 states and 1045 transitions. [2020-12-22 13:14:52,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 13:14:52,237 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1045 transitions. [2020-12-22 13:14:52,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2020-12-22 13:14:52,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:52,239 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 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] [2020-12-22 13:14:52,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 13:14:52,453 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:52,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:52,454 INFO L82 PathProgramCache]: Analyzing trace with hash 308808579, now seen corresponding path program 3 times [2020-12-22 13:14:52,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:52,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893554413] [2020-12-22 13:14:52,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:52,753 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 7 proven. 378 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 13:14:52,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893554413] [2020-12-22 13:14:52,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677327345] [2020-12-22 13:14:52,754 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:53,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 13:14:53,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:53,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 735 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 13:14:53,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:53,696 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-12-22 13:14:53,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:53,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5] total 20 [2020-12-22 13:14:53,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445589548] [2020-12-22 13:14:53,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 13:14:53,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:53,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 13:14:53,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-12-22 13:14:53,700 INFO L87 Difference]: Start difference. First operand 792 states and 1045 transitions. Second operand 20 states. [2020-12-22 13:14:54,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:54,627 INFO L93 Difference]: Finished difference Result 2122 states and 2827 transitions. [2020-12-22 13:14:54,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 13:14:54,628 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 143 [2020-12-22 13:14:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:54,635 INFO L225 Difference]: With dead ends: 2122 [2020-12-22 13:14:54,636 INFO L226 Difference]: Without dead ends: 1354 [2020-12-22 13:14:54,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=423, Invalid=909, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 13:14:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-12-22 13:14:54,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 812. [2020-12-22 13:14:54,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-12-22 13:14:54,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 1069 transitions. [2020-12-22 13:14:54,779 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 1069 transitions. Word has length 143 [2020-12-22 13:14:54,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:54,780 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 1069 transitions. [2020-12-22 13:14:54,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 13:14:54,780 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 1069 transitions. [2020-12-22 13:14:54,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 13:14:54,781 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:54,782 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 3, 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] [2020-12-22 13:14:54,996 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:54,997 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:54,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:54,998 INFO L82 PathProgramCache]: Analyzing trace with hash -188103219, now seen corresponding path program 4 times [2020-12-22 13:14:54,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:54,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941185090] [2020-12-22 13:14:54,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:55,315 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 7 proven. 435 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:14:55,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941185090] [2020-12-22 13:14:55,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508592249] [2020-12-22 13:14:55,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:14:55,845 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 13:14:55,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:55,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 13:14:55,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:56,022 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 7 proven. 435 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:14:56,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:14:56,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 13:14:56,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999157294] [2020-12-22 13:14:56,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 13:14:56,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:56,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 13:14:56,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 13:14:56,024 INFO L87 Difference]: Start difference. First operand 812 states and 1069 transitions. Second operand 19 states. [2020-12-22 13:14:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:56,256 INFO L93 Difference]: Finished difference Result 1628 states and 2148 transitions. [2020-12-22 13:14:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 13:14:56,257 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 148 [2020-12-22 13:14:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:56,261 INFO L225 Difference]: With dead ends: 1628 [2020-12-22 13:14:56,261 INFO L226 Difference]: Without dead ends: 840 [2020-12-22 13:14:56,263 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-12-22 13:14:56,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2020-12-22 13:14:56,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 828. [2020-12-22 13:14:56,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2020-12-22 13:14:56,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1089 transitions. [2020-12-22 13:14:56,398 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1089 transitions. Word has length 148 [2020-12-22 13:14:56,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:56,399 INFO L481 AbstractCegarLoop]: Abstraction has 828 states and 1089 transitions. [2020-12-22 13:14:56,399 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 13:14:56,399 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1089 transitions. [2020-12-22 13:14:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-12-22 13:14:56,400 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:56,401 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 3, 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] [2020-12-22 13:14:56,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 13:14:56,615 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:56,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:56,616 INFO L82 PathProgramCache]: Analyzing trace with hash 140486196, now seen corresponding path program 5 times [2020-12-22 13:14:56,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:56,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228310354] [2020-12-22 13:14:56,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 7 proven. 496 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:14:56,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228310354] [2020-12-22 13:14:56,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526049237] [2020-12-22 13:14:56,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:23,522 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2020-12-22 13:15:23,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:15:23,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 13:15:23,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:15:23,731 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 7 proven. 496 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:15:23,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:15:23,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 13:15:23,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578701407] [2020-12-22 13:15:23,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 13:15:23,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:23,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 13:15:23,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 13:15:23,733 INFO L87 Difference]: Start difference. First operand 828 states and 1089 transitions. Second operand 20 states. [2020-12-22 13:15:23,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:23,966 INFO L93 Difference]: Finished difference Result 1660 states and 2188 transitions. [2020-12-22 13:15:23,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 13:15:23,967 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 152 [2020-12-22 13:15:23,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:23,971 INFO L225 Difference]: With dead ends: 1660 [2020-12-22 13:15:23,972 INFO L226 Difference]: Without dead ends: 856 [2020-12-22 13:15:23,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-12-22 13:15:23,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2020-12-22 13:15:24,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 844. [2020-12-22 13:15:24,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 844 states. [2020-12-22 13:15:24,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 1109 transitions. [2020-12-22 13:15:24,110 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 1109 transitions. Word has length 152 [2020-12-22 13:15:24,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:24,110 INFO L481 AbstractCegarLoop]: Abstraction has 844 states and 1109 transitions. [2020-12-22 13:15:24,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 13:15:24,110 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 1109 transitions. [2020-12-22 13:15:24,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 13:15:24,112 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:24,112 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 3, 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] [2020-12-22 13:15:24,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 13:15:24,313 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:24,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:24,314 INFO L82 PathProgramCache]: Analyzing trace with hash -1548682469, now seen corresponding path program 6 times [2020-12-22 13:15:24,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:24,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791552844] [2020-12-22 13:15:24,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:24,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:24,734 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 7 proven. 561 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-12-22 13:15:24,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791552844] [2020-12-22 13:15:24,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1193806450] [2020-12-22 13:15:24,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:27,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 13:15:27,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:15:27,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 787 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 13:15:27,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:15:27,345 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 567 trivial. 0 not checked. [2020-12-22 13:15:27,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:15:27,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 6] total 24 [2020-12-22 13:15:27,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599387028] [2020-12-22 13:15:27,346 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 13:15:27,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:27,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 13:15:27,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2020-12-22 13:15:27,347 INFO L87 Difference]: Start difference. First operand 844 states and 1109 transitions. Second operand 24 states. [2020-12-22 13:15:28,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:28,660 INFO L93 Difference]: Finished difference Result 2274 states and 3015 transitions. [2020-12-22 13:15:28,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 13:15:28,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 156 [2020-12-22 13:15:28,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:28,666 INFO L225 Difference]: With dead ends: 2274 [2020-12-22 13:15:28,666 INFO L226 Difference]: Without dead ends: 1454 [2020-12-22 13:15:28,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=588, Invalid=1392, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 13:15:28,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2020-12-22 13:15:28,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 864. [2020-12-22 13:15:28,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2020-12-22 13:15:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1133 transitions. [2020-12-22 13:15:28,842 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1133 transitions. Word has length 156 [2020-12-22 13:15:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:28,843 INFO L481 AbstractCegarLoop]: Abstraction has 864 states and 1133 transitions. [2020-12-22 13:15:28,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 13:15:28,843 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1133 transitions. [2020-12-22 13:15:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 13:15:28,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:28,845 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 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] [2020-12-22 13:15:29,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:29,059 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:29,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:29,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1044725959, now seen corresponding path program 7 times [2020-12-22 13:15:29,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:29,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108583579] [2020-12-22 13:15:29,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:29,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:29,445 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 7 proven. 630 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 13:15:29,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108583579] [2020-12-22 13:15:29,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736545312] [2020-12-22 13:15:29,446 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:29,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 13:15:29,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:15:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 7 proven. 630 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 13:15:29,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:15:29,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 13:15:29,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008143114] [2020-12-22 13:15:29,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 13:15:29,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:29,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 13:15:29,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 13:15:29,978 INFO L87 Difference]: Start difference. First operand 864 states and 1133 transitions. Second operand 22 states. [2020-12-22 13:15:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:30,234 INFO L93 Difference]: Finished difference Result 1732 states and 2276 transitions. [2020-12-22 13:15:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 13:15:30,235 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 161 [2020-12-22 13:15:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:30,238 INFO L225 Difference]: With dead ends: 1732 [2020-12-22 13:15:30,238 INFO L226 Difference]: Without dead ends: 892 [2020-12-22 13:15:30,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-12-22 13:15:30,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 892 states. [2020-12-22 13:15:30,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 892 to 880. [2020-12-22 13:15:30,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 880 states. [2020-12-22 13:15:30,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1153 transitions. [2020-12-22 13:15:30,368 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1153 transitions. Word has length 161 [2020-12-22 13:15:30,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:30,369 INFO L481 AbstractCegarLoop]: Abstraction has 880 states and 1153 transitions. [2020-12-22 13:15:30,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 13:15:30,369 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1153 transitions. [2020-12-22 13:15:30,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-22 13:15:30,370 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:30,371 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 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] [2020-12-22 13:15:30,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 13:15:30,586 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:30,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:30,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1433894848, now seen corresponding path program 8 times [2020-12-22 13:15:30,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:30,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593581889] [2020-12-22 13:15:30,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:30,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 7 proven. 703 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 13:15:31,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593581889] [2020-12-22 13:15:31,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704934830] [2020-12-22 13:15:31,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:31,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:15:31,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:15:31,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 13:15:31,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:15:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 722 backedges. 7 proven. 703 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 13:15:31,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:15:31,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-12-22 13:15:31,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258151785] [2020-12-22 13:15:31,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 13:15:31,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:31,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 13:15:31,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 13:15:31,595 INFO L87 Difference]: Start difference. First operand 880 states and 1153 transitions. Second operand 23 states. [2020-12-22 13:15:31,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:31,862 INFO L93 Difference]: Finished difference Result 1764 states and 2316 transitions. [2020-12-22 13:15:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 13:15:31,863 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 165 [2020-12-22 13:15:31,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:31,866 INFO L225 Difference]: With dead ends: 1764 [2020-12-22 13:15:31,866 INFO L226 Difference]: Without dead ends: 908 [2020-12-22 13:15:31,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-12-22 13:15:31,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2020-12-22 13:15:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 896. [2020-12-22 13:15:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 896 states. [2020-12-22 13:15:31,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1173 transitions. [2020-12-22 13:15:31,991 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1173 transitions. Word has length 165 [2020-12-22 13:15:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:31,991 INFO L481 AbstractCegarLoop]: Abstraction has 896 states and 1173 transitions. [2020-12-22 13:15:31,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 13:15:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1173 transitions. [2020-12-22 13:15:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-12-22 13:15:31,993 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:31,994 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 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] [2020-12-22 13:15:32,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:32,209 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:32,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:32,209 INFO L82 PathProgramCache]: Analyzing trace with hash -82863559, now seen corresponding path program 9 times [2020-12-22 13:15:32,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:32,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351205095] [2020-12-22 13:15:32,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:32,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:32,715 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 7 proven. 780 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-22 13:15:32,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351205095] [2020-12-22 13:15:32,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855428146] [2020-12-22 13:15:32,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:33,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 13:15:33,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:15:33,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 763 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 13:15:33,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:15:33,755 INFO L134 CoverageAnalysis]: Checked inductivity of 799 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 791 trivial. 0 not checked. [2020-12-22 13:15:33,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:15:33,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 6] total 27 [2020-12-22 13:15:33,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139522044] [2020-12-22 13:15:33,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 13:15:33,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:33,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 13:15:33,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=438, Unknown=0, NotChecked=0, Total=702 [2020-12-22 13:15:33,757 INFO L87 Difference]: Start difference. First operand 896 states and 1173 transitions. Second operand 27 states. [2020-12-22 13:15:35,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:35,899 INFO L93 Difference]: Finished difference Result 2644 states and 3485 transitions. [2020-12-22 13:15:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 13:15:35,899 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 169 [2020-12-22 13:15:35,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:35,908 INFO L225 Difference]: With dead ends: 2644 [2020-12-22 13:15:35,908 INFO L226 Difference]: Without dead ends: 1772 [2020-12-22 13:15:35,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1047 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1563, Invalid=3549, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 13:15:35,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1772 states. [2020-12-22 13:15:36,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1772 to 916. [2020-12-22 13:15:36,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 916 states. [2020-12-22 13:15:36,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1197 transitions. [2020-12-22 13:15:36,084 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1197 transitions. Word has length 169 [2020-12-22 13:15:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:36,085 INFO L481 AbstractCegarLoop]: Abstraction has 916 states and 1197 transitions. [2020-12-22 13:15:36,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 13:15:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1197 transitions. [2020-12-22 13:15:36,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-12-22 13:15:36,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:36,087 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 3, 3, 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] [2020-12-22 13:15:36,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 13:15:36,301 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:36,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:36,302 INFO L82 PathProgramCache]: Analyzing trace with hash 2112770453, now seen corresponding path program 10 times [2020-12-22 13:15:36,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:36,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758263780] [2020-12-22 13:15:36,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:36,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:36,784 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 7 proven. 861 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:15:36,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758263780] [2020-12-22 13:15:36,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636309398] [2020-12-22 13:15:36,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:15:38,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 13:15:38,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:15:38,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 1053 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 13:15:38,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:15:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 7 proven. 861 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:15:38,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:15:38,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-12-22 13:15:38,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504321314] [2020-12-22 13:15:38,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 13:15:38,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:15:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 13:15:38,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 13:15:38,259 INFO L87 Difference]: Start difference. First operand 916 states and 1197 transitions. Second operand 25 states. [2020-12-22 13:15:38,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:15:38,548 INFO L93 Difference]: Finished difference Result 1836 states and 2404 transitions. [2020-12-22 13:15:38,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 13:15:38,549 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 174 [2020-12-22 13:15:38,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:15:38,554 INFO L225 Difference]: With dead ends: 1836 [2020-12-22 13:15:38,554 INFO L226 Difference]: Without dead ends: 944 [2020-12-22 13:15:38,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-12-22 13:15:38,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2020-12-22 13:15:38,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 932. [2020-12-22 13:15:38,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 932 states. [2020-12-22 13:15:38,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 932 states to 932 states and 1217 transitions. [2020-12-22 13:15:38,664 INFO L78 Accepts]: Start accepts. Automaton has 932 states and 1217 transitions. Word has length 174 [2020-12-22 13:15:38,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:15:38,665 INFO L481 AbstractCegarLoop]: Abstraction has 932 states and 1217 transitions. [2020-12-22 13:15:38,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 13:15:38,665 INFO L276 IsEmpty]: Start isEmpty. Operand 932 states and 1217 transitions. [2020-12-22 13:15:38,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-12-22 13:15:38,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:15:38,667 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 3, 3, 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] [2020-12-22 13:15:38,875 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 13:15:38,876 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:15:38,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:15:38,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1886785732, now seen corresponding path program 11 times [2020-12-22 13:15:38,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:15:38,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697036314] [2020-12-22 13:15:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:15:38,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:15:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 967 backedges. 7 proven. 946 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:15:39,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697036314] [2020-12-22 13:15:39,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800382547] [2020-12-22 13:15:39,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true