/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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:10:39,931 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:10:39,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:10:39,992 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:10:39,993 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:10:39,998 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:10:40,002 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:10:40,012 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:10:40,017 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:10:40,024 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:10:40,026 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:10:40,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:10:40,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:10:40,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:10:40,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:10:40,039 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:10:40,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:10:40,044 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:10:40,054 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:10:40,063 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:10:40,065 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:10:40,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:10:40,070 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:10:40,073 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:10:40,104 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:10:40,104 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:10:40,105 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:10:40,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:10:40,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:10:40,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:10:40,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:10:40,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:10:40,114 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:10:40,115 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:10:40,116 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:10:40,117 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:10:40,117 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:10:40,118 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:10:40,118 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:10:40,119 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:10:40,120 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:10:40,126 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:10:40,185 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:10:40,185 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:10:40,190 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:10:40,191 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:10:40,191 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:10:40,191 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:10:40,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:10:40,192 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:10:40,192 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:10:40,193 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:10:40,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:10:40,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:10:40,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:10:40,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:10:40,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:10:40,196 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:10:40,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:10:40,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:10:40,197 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:10:40,197 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:10:40,198 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:10:40,198 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:10:40,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:10:40,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:10:40,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:10:40,199 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:10:40,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:10:40,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:10:40,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:10:40,753 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:10:40,753 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:10:40,754 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2020-12-22 13:10:40,851 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e64a8a2ed/3d3cc9a16b834612804dcd2d1c05de70/FLAG638676e9f [2020-12-22 13:10:41,909 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:10:41,910 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2020-12-22 13:10:41,952 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e64a8a2ed/3d3cc9a16b834612804dcd2d1c05de70/FLAG638676e9f [2020-12-22 13:10:42,376 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e64a8a2ed/3d3cc9a16b834612804dcd2d1c05de70 [2020-12-22 13:10:42,379 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:10:42,382 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:10:42,384 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:10:42,384 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:10:42,391 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:10:42,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:10:42" (1/1) ... [2020-12-22 13:10:42,393 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21931d67 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:42, skipping insertion in model container [2020-12-22 13:10:42,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:10:42" (1/1) ... [2020-12-22 13:10:42,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:10:42,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:10:43,590 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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2020-12-22 13:10:44,113 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:10:44,165 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:10:44,369 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-3.12-rc1/linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i[163937,163950] [2020-12-22 13:10:44,795 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:10:45,027 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:10:45,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45 WrapperNode [2020-12-22 13:10:45,028 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:10:45,031 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:10:45,032 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:10:45,032 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:10:45,042 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,357 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:10:45,360 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:10:45,361 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:10:45,361 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:10:45,373 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,373 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,599 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,629 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (1/1) ... [2020-12-22 13:10:45,705 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:10:45,708 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:10:45,708 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:10:45,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:10:45,710 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (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 13:10:45,833 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_usb_submit_urb_3 [2020-12-22 13:10:45,833 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_usb_submit_urb_3 [2020-12-22 13:10:45,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:10:45,834 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_submit_urb [2020-12-22 13:10:45,834 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_submit_urb [2020-12-22 13:10:45,834 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:10:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:10:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:10:45,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:10:45,836 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 13:10:45,837 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~TO~VOID [2020-12-22 13:10:45,839 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:10:45,839 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:10:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:10:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure esd_usb2_read_bulk_callback [2020-12-22 13:10:45,840 INFO L138 BoogieDeclarations]: Found implementation of procedure esd_usb2_read_bulk_callback [2020-12-22 13:10:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:10:45,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:10:45,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:10:50,754 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:10:50,754 INFO L299 CfgBuilder]: Removed 577 assume(true) statements. [2020-12-22 13:10:50,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:10:50 BoogieIcfgContainer [2020-12-22 13:10:50,757 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:10:50,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:10:50,759 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:10:50,763 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:10:50,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:10:42" (1/3) ... [2020-12-22 13:10:50,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b92c890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:10:50, skipping insertion in model container [2020-12-22 13:10:50,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:10:45" (2/3) ... [2020-12-22 13:10:50,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b92c890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:10:50, skipping insertion in model container [2020-12-22 13:10:50,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:10:50" (3/3) ... [2020-12-22 13:10:50,766 INFO L111 eAbstractionObserver]: Analyzing ICFG linux-3.12-rc1.tar.xz-144_2a-drivers--net--can--usb--esd_usb2.ko-entry_point.cil.out.i [2020-12-22 13:10:50,774 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:10:50,780 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 5 error locations. [2020-12-22 13:10:50,800 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-12-22 13:10:50,834 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:10:50,834 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:10:50,834 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:10:50,834 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:10:50,834 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:10:50,835 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:10:50,835 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:10:50,835 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:10:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states. [2020-12-22 13:10:50,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 13:10:50,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:50,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:10:50,876 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:50,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:50,883 INFO L82 PathProgramCache]: Analyzing trace with hash -443169162, now seen corresponding path program 1 times [2020-12-22 13:10:50,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:50,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12982228] [2020-12-22 13:10:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:51,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:51,538 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 13:10:51,539 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12982228] [2020-12-22 13:10:51,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:51,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:10:51,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743843200] [2020-12-22 13:10:51,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:51,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:51,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:51,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:51,569 INFO L87 Difference]: Start difference. First operand 598 states. Second operand 3 states. [2020-12-22 13:10:52,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:52,260 INFO L93 Difference]: Finished difference Result 1694 states and 2383 transitions. [2020-12-22 13:10:52,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:52,262 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-12-22 13:10:52,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:52,298 INFO L225 Difference]: With dead ends: 1694 [2020-12-22 13:10:52,299 INFO L226 Difference]: Without dead ends: 1079 [2020-12-22 13:10:52,312 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 13:10:52,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1079 states. [2020-12-22 13:10:52,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1079 to 1079. [2020-12-22 13:10:52,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1079 states. [2020-12-22 13:10:52,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1079 states to 1079 states and 1457 transitions. [2020-12-22 13:10:52,477 INFO L78 Accepts]: Start accepts. Automaton has 1079 states and 1457 transitions. Word has length 36 [2020-12-22 13:10:52,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:52,478 INFO L481 AbstractCegarLoop]: Abstraction has 1079 states and 1457 transitions. [2020-12-22 13:10:52,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:52,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1079 states and 1457 transitions. [2020-12-22 13:10:52,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 13:10:52,481 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:52,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:10:52,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:10:52,482 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:52,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:52,484 INFO L82 PathProgramCache]: Analyzing trace with hash 71303661, now seen corresponding path program 1 times [2020-12-22 13:10:52,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:52,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372099086] [2020-12-22 13:10:52,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:52,832 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 13:10:52,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372099086] [2020-12-22 13:10:52,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:52,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:10:52,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570705332] [2020-12-22 13:10:52,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:52,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:52,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:52,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:52,839 INFO L87 Difference]: Start difference. First operand 1079 states and 1457 transitions. Second operand 3 states. [2020-12-22 13:10:53,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:53,035 INFO L93 Difference]: Finished difference Result 3119 states and 4232 transitions. [2020-12-22 13:10:53,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:53,036 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 13:10:53,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:53,048 INFO L225 Difference]: With dead ends: 3119 [2020-12-22 13:10:53,049 INFO L226 Difference]: Without dead ends: 2098 [2020-12-22 13:10:53,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:53,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2098 states. [2020-12-22 13:10:53,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2098 to 2086. [2020-12-22 13:10:53,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2086 states. [2020-12-22 13:10:53,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 2826 transitions. [2020-12-22 13:10:53,149 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 2826 transitions. Word has length 43 [2020-12-22 13:10:53,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:53,149 INFO L481 AbstractCegarLoop]: Abstraction has 2086 states and 2826 transitions. [2020-12-22 13:10:53,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:53,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 2826 transitions. [2020-12-22 13:10:53,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-12-22 13:10:53,153 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:53,153 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:10:53,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:10:53,154 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:53,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:53,154 INFO L82 PathProgramCache]: Analyzing trace with hash -2084553551, now seen corresponding path program 1 times [2020-12-22 13:10:53,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:53,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882889371] [2020-12-22 13:10:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:53,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:53,382 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 13:10:53,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882889371] [2020-12-22 13:10:53,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:53,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:10:53,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283167106] [2020-12-22 13:10:53,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:53,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:53,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:53,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:53,401 INFO L87 Difference]: Start difference. First operand 2086 states and 2826 transitions. Second operand 3 states. [2020-12-22 13:10:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:53,490 INFO L93 Difference]: Finished difference Result 2086 states and 2826 transitions. [2020-12-22 13:10:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:53,490 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 44 [2020-12-22 13:10:53,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:53,504 INFO L225 Difference]: With dead ends: 2086 [2020-12-22 13:10:53,504 INFO L226 Difference]: Without dead ends: 2084 [2020-12-22 13:10:53,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:53,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2020-12-22 13:10:53,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 2084. [2020-12-22 13:10:53,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2084 states. [2020-12-22 13:10:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 2824 transitions. [2020-12-22 13:10:53,676 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 2824 transitions. Word has length 44 [2020-12-22 13:10:53,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:53,677 INFO L481 AbstractCegarLoop]: Abstraction has 2084 states and 2824 transitions. [2020-12-22 13:10:53,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:53,677 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 2824 transitions. [2020-12-22 13:10:53,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-22 13:10:53,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:53,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:10:53,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:10:53,680 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:53,681 INFO L82 PathProgramCache]: Analyzing trace with hash -196650377, now seen corresponding path program 1 times [2020-12-22 13:10:53,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:53,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88646019] [2020-12-22 13:10:53,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:53,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:53,901 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 13:10:53,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88646019] [2020-12-22 13:10:53,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:53,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:10:53,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866316762] [2020-12-22 13:10:53,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:53,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:53,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:53,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:53,905 INFO L87 Difference]: Start difference. First operand 2084 states and 2824 transitions. Second operand 3 states. [2020-12-22 13:10:54,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:54,009 INFO L93 Difference]: Finished difference Result 2084 states and 2824 transitions. [2020-12-22 13:10:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:54,010 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 45 [2020-12-22 13:10:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:54,024 INFO L225 Difference]: With dead ends: 2084 [2020-12-22 13:10:54,025 INFO L226 Difference]: Without dead ends: 2082 [2020-12-22 13:10:54,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:54,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2082 states. [2020-12-22 13:10:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2082 to 2082. [2020-12-22 13:10:54,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2082 states. [2020-12-22 13:10:54,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2082 states to 2082 states and 2822 transitions. [2020-12-22 13:10:54,146 INFO L78 Accepts]: Start accepts. Automaton has 2082 states and 2822 transitions. Word has length 45 [2020-12-22 13:10:54,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:54,146 INFO L481 AbstractCegarLoop]: Abstraction has 2082 states and 2822 transitions. [2020-12-22 13:10:54,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:54,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2082 states and 2822 transitions. [2020-12-22 13:10:54,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 13:10:54,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:54,150 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:10:54,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:10:54,150 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:54,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:54,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1801194117, now seen corresponding path program 1 times [2020-12-22 13:10:54,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:54,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519665982] [2020-12-22 13:10:54,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:54,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:54,335 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 13:10:54,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519665982] [2020-12-22 13:10:54,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:54,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:10:54,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229042176] [2020-12-22 13:10:54,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:54,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:54,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:54,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:54,340 INFO L87 Difference]: Start difference. First operand 2082 states and 2822 transitions. Second operand 3 states. [2020-12-22 13:10:54,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:54,454 INFO L93 Difference]: Finished difference Result 2082 states and 2822 transitions. [2020-12-22 13:10:54,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:54,455 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 46 [2020-12-22 13:10:54,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:54,467 INFO L225 Difference]: With dead ends: 2082 [2020-12-22 13:10:54,467 INFO L226 Difference]: Without dead ends: 2080 [2020-12-22 13:10:54,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2080 states. [2020-12-22 13:10:54,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2080 to 2080. [2020-12-22 13:10:54,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2080 states. [2020-12-22 13:10:54,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2080 states to 2080 states and 2820 transitions. [2020-12-22 13:10:54,596 INFO L78 Accepts]: Start accepts. Automaton has 2080 states and 2820 transitions. Word has length 46 [2020-12-22 13:10:54,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:54,599 INFO L481 AbstractCegarLoop]: Abstraction has 2080 states and 2820 transitions. [2020-12-22 13:10:54,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:54,599 INFO L276 IsEmpty]: Start isEmpty. Operand 2080 states and 2820 transitions. [2020-12-22 13:10:54,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-12-22 13:10:54,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:54,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:10:54,602 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:10:54,602 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:54,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:54,603 INFO L82 PathProgramCache]: Analyzing trace with hash -2442495, now seen corresponding path program 1 times [2020-12-22 13:10:54,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:54,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826192037] [2020-12-22 13:10:54,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:54,872 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 13:10:54,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826192037] [2020-12-22 13:10:54,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:54,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 13:10:54,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297977936] [2020-12-22 13:10:54,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:54,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:54,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:54,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:54,876 INFO L87 Difference]: Start difference. First operand 2080 states and 2820 transitions. Second operand 3 states. [2020-12-22 13:10:54,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:54,965 INFO L93 Difference]: Finished difference Result 2080 states and 2820 transitions. [2020-12-22 13:10:54,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:54,966 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 47 [2020-12-22 13:10:54,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:54,979 INFO L225 Difference]: With dead ends: 2080 [2020-12-22 13:10:54,979 INFO L226 Difference]: Without dead ends: 2071 [2020-12-22 13:10:54,982 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:54,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2020-12-22 13:10:55,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 2071. [2020-12-22 13:10:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2071 states. [2020-12-22 13:10:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2071 states to 2071 states and 2808 transitions. [2020-12-22 13:10:55,106 INFO L78 Accepts]: Start accepts. Automaton has 2071 states and 2808 transitions. Word has length 47 [2020-12-22 13:10:55,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:55,114 INFO L481 AbstractCegarLoop]: Abstraction has 2071 states and 2808 transitions. [2020-12-22 13:10:55,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:55,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2071 states and 2808 transitions. [2020-12-22 13:10:55,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 13:10:55,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:55,118 INFO L422 BasicCegarLoop]: trace histogram [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 13:10:55,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:10:55,118 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:55,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:55,119 INFO L82 PathProgramCache]: Analyzing trace with hash -529667920, now seen corresponding path program 1 times [2020-12-22 13:10:55,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:55,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156946374] [2020-12-22 13:10:55,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:55,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:55,250 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:10:55,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156946374] [2020-12-22 13:10:55,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:55,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:10:55,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004897846] [2020-12-22 13:10:55,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:55,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:55,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:55,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:55,252 INFO L87 Difference]: Start difference. First operand 2071 states and 2808 transitions. Second operand 3 states. [2020-12-22 13:10:55,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:55,462 INFO L93 Difference]: Finished difference Result 4707 states and 6367 transitions. [2020-12-22 13:10:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:55,462 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 13:10:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:55,477 INFO L225 Difference]: With dead ends: 4707 [2020-12-22 13:10:55,477 INFO L226 Difference]: Without dead ends: 2694 [2020-12-22 13:10:55,483 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 13:10:55,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2694 states. [2020-12-22 13:10:55,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2694 to 2689. [2020-12-22 13:10:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2689 states. [2020-12-22 13:10:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2689 states to 2689 states and 3620 transitions. [2020-12-22 13:10:55,688 INFO L78 Accepts]: Start accepts. Automaton has 2689 states and 3620 transitions. Word has length 72 [2020-12-22 13:10:55,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:55,688 INFO L481 AbstractCegarLoop]: Abstraction has 2689 states and 3620 transitions. [2020-12-22 13:10:55,688 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:55,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2689 states and 3620 transitions. [2020-12-22 13:10:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-12-22 13:10:55,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:55,695 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:10:55,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:10:55,695 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:55,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:55,696 INFO L82 PathProgramCache]: Analyzing trace with hash 2065425063, now seen corresponding path program 1 times [2020-12-22 13:10:55,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:55,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658764791] [2020-12-22 13:10:55,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:55,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:55,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:10:55,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658764791] [2020-12-22 13:10:55,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:55,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:10:55,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498181941] [2020-12-22 13:10:55,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:55,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:55,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:55,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:10:55,871 INFO L87 Difference]: Start difference. First operand 2689 states and 3620 transitions. Second operand 3 states. [2020-12-22 13:10:56,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:56,559 INFO L93 Difference]: Finished difference Result 5991 states and 8079 transitions. [2020-12-22 13:10:56,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:56,559 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 84 [2020-12-22 13:10:56,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:56,577 INFO L225 Difference]: With dead ends: 5991 [2020-12-22 13:10:56,578 INFO L226 Difference]: Without dead ends: 3360 [2020-12-22 13:10:56,584 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 13:10:56,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2020-12-22 13:10:56,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 3355. [2020-12-22 13:10:56,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3355 states. [2020-12-22 13:10:56,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 4500 transitions. [2020-12-22 13:10:56,753 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 4500 transitions. Word has length 84 [2020-12-22 13:10:56,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:56,753 INFO L481 AbstractCegarLoop]: Abstraction has 3355 states and 4500 transitions. [2020-12-22 13:10:56,753 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:56,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 4500 transitions. [2020-12-22 13:10:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-12-22 13:10:56,757 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:56,757 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:10:56,758 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:10:56,758 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:56,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:56,758 INFO L82 PathProgramCache]: Analyzing trace with hash -884858301, now seen corresponding path program 1 times [2020-12-22 13:10:56,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:56,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805861044] [2020-12-22 13:10:56,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 27 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:10:57,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805861044] [2020-12-22 13:10:57,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863170272] [2020-12-22 13:10:57,008 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 13:10:57,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:57,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 1675 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:10:57,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:10:58,081 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:10:58,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:10:58,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:10:58,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268961359] [2020-12-22 13:10:58,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:10:58,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:58,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:10:58,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:10:58,084 INFO L87 Difference]: Start difference. First operand 3355 states and 4500 transitions. Second operand 3 states. [2020-12-22 13:10:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:58,481 INFO L93 Difference]: Finished difference Result 7959 states and 10723 transitions. [2020-12-22 13:10:58,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:10:58,482 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 98 [2020-12-22 13:10:58,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:58,509 INFO L225 Difference]: With dead ends: 7959 [2020-12-22 13:10:58,509 INFO L226 Difference]: Without dead ends: 4662 [2020-12-22 13:10:58,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:10:58,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4662 states. [2020-12-22 13:10:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4662 to 4657. [2020-12-22 13:10:58,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4657 states. [2020-12-22 13:10:58,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 6280 transitions. [2020-12-22 13:10:58,870 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 6280 transitions. Word has length 98 [2020-12-22 13:10:58,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:10:58,870 INFO L481 AbstractCegarLoop]: Abstraction has 4657 states and 6280 transitions. [2020-12-22 13:10:58,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:10:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 6280 transitions. [2020-12-22 13:10:58,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-12-22 13:10:58,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:10:58,881 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:10:59,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 13:10:59,098 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:10:59,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:10:59,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1363892421, now seen corresponding path program 1 times [2020-12-22 13:10:59,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:10:59,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956487640] [2020-12-22 13:10:59,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:10:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:10:59,302 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 13:10:59,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956487640] [2020-12-22 13:10:59,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:10:59,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:10:59,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601914598] [2020-12-22 13:10:59,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:10:59,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:10:59,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:10:59,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:10:59,304 INFO L87 Difference]: Start difference. First operand 4657 states and 6280 transitions. Second operand 4 states. [2020-12-22 13:10:59,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:10:59,744 INFO L93 Difference]: Finished difference Result 12299 states and 16546 transitions. [2020-12-22 13:10:59,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:10:59,745 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 113 [2020-12-22 13:10:59,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:10:59,784 INFO L225 Difference]: With dead ends: 12299 [2020-12-22 13:10:59,784 INFO L226 Difference]: Without dead ends: 7700 [2020-12-22 13:10:59,796 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 13:10:59,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7700 states. [2020-12-22 13:11:00,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7700 to 4665. [2020-12-22 13:11:00,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4665 states. [2020-12-22 13:11:00,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 6288 transitions. [2020-12-22 13:11:00,161 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 6288 transitions. Word has length 113 [2020-12-22 13:11:00,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:00,162 INFO L481 AbstractCegarLoop]: Abstraction has 4665 states and 6288 transitions. [2020-12-22 13:11:00,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:11:00,162 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 6288 transitions. [2020-12-22 13:11:00,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-12-22 13:11:00,167 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:00,167 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:00,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 13:11:00,168 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:00,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:00,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1554090079, now seen corresponding path program 1 times [2020-12-22 13:11:00,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:00,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253692303] [2020-12-22 13:11:00,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:00,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253692303] [2020-12-22 13:11:00,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562882366] [2020-12-22 13:11:00,395 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 13:11:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:01,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 1776 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:11:01,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:01,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:11:01,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2020-12-22 13:11:01,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940221262] [2020-12-22 13:11:01,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:11:01,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:01,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:11:01,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:01,340 INFO L87 Difference]: Start difference. First operand 4665 states and 6288 transitions. Second operand 4 states. [2020-12-22 13:11:03,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:03,216 INFO L93 Difference]: Finished difference Result 13880 states and 18726 transitions. [2020-12-22 13:11:03,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:11:03,217 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 115 [2020-12-22 13:11:03,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:03,290 INFO L225 Difference]: With dead ends: 13880 [2020-12-22 13:11:03,290 INFO L226 Difference]: Without dead ends: 13875 [2020-12-22 13:11:03,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 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 13:11:03,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13875 states. [2020-12-22 13:11:04,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13875 to 13497. [2020-12-22 13:11:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13497 states. [2020-12-22 13:11:04,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13497 states to 13497 states and 18246 transitions. [2020-12-22 13:11:04,334 INFO L78 Accepts]: Start accepts. Automaton has 13497 states and 18246 transitions. Word has length 115 [2020-12-22 13:11:04,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:04,335 INFO L481 AbstractCegarLoop]: Abstraction has 13497 states and 18246 transitions. [2020-12-22 13:11:04,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:11:04,335 INFO L276 IsEmpty]: Start isEmpty. Operand 13497 states and 18246 transitions. [2020-12-22 13:11:04,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 13:11:04,356 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:04,356 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:04,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:04,572 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:04,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:04,573 INFO L82 PathProgramCache]: Analyzing trace with hash -665798046, now seen corresponding path program 1 times [2020-12-22 13:11:04,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:04,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879550807] [2020-12-22 13:11:04,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-12-22 13:11:04,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879550807] [2020-12-22 13:11:04,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215085566] [2020-12-22 13:11:04,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:11:05,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:05,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 1851 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:11:05,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:05,845 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 13:11:05,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:11:05,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 8 [2020-12-22 13:11:05,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823169110] [2020-12-22 13:11:05,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:05,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:05,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:05,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:11:05,848 INFO L87 Difference]: Start difference. First operand 13497 states and 18246 transitions. Second operand 3 states. [2020-12-22 13:11:06,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:06,791 INFO L93 Difference]: Finished difference Result 20544 states and 27796 transitions. [2020-12-22 13:11:06,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:06,792 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 122 [2020-12-22 13:11:06,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:06,815 INFO L225 Difference]: With dead ends: 20544 [2020-12-22 13:11:06,815 INFO L226 Difference]: Without dead ends: 6681 [2020-12-22 13:11:06,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:11:06,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6681 states. [2020-12-22 13:11:07,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6681 to 6681. [2020-12-22 13:11:07,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6681 states. [2020-12-22 13:11:07,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6681 states to 6681 states and 9009 transitions. [2020-12-22 13:11:07,221 INFO L78 Accepts]: Start accepts. Automaton has 6681 states and 9009 transitions. Word has length 122 [2020-12-22 13:11:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:07,222 INFO L481 AbstractCegarLoop]: Abstraction has 6681 states and 9009 transitions. [2020-12-22 13:11:07,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 6681 states and 9009 transitions. [2020-12-22 13:11:07,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 13:11:07,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:07,233 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:07,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 13:11:07,447 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:07,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:07,448 INFO L82 PathProgramCache]: Analyzing trace with hash -313338411, now seen corresponding path program 1 times [2020-12-22 13:11:07,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:07,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542428159] [2020-12-22 13:11:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:07,578 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-12-22 13:11:07,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542428159] [2020-12-22 13:11:07,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:07,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:07,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914109044] [2020-12-22 13:11:07,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:07,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:07,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:07,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:07,581 INFO L87 Difference]: Start difference. First operand 6681 states and 9009 transitions. Second operand 3 states. [2020-12-22 13:11:08,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:08,272 INFO L93 Difference]: Finished difference Result 17488 states and 23818 transitions. [2020-12-22 13:11:08,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:08,273 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2020-12-22 13:11:08,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:08,312 INFO L225 Difference]: With dead ends: 17488 [2020-12-22 13:11:08,313 INFO L226 Difference]: Without dead ends: 10823 [2020-12-22 13:11:08,330 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 13:11:08,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10823 states. [2020-12-22 13:11:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10823 to 10718. [2020-12-22 13:11:08,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10718 states. [2020-12-22 13:11:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10718 states to 10718 states and 14646 transitions. [2020-12-22 13:11:08,906 INFO L78 Accepts]: Start accepts. Automaton has 10718 states and 14646 transitions. Word has length 129 [2020-12-22 13:11:08,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:08,906 INFO L481 AbstractCegarLoop]: Abstraction has 10718 states and 14646 transitions. [2020-12-22 13:11:08,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:08,906 INFO L276 IsEmpty]: Start isEmpty. Operand 10718 states and 14646 transitions. [2020-12-22 13:11:08,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 13:11:08,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:08,923 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:08,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 13:11:08,924 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:08,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:08,924 INFO L82 PathProgramCache]: Analyzing trace with hash -16011027, now seen corresponding path program 2 times [2020-12-22 13:11:08,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:08,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013241000] [2020-12-22 13:11:08,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:09,189 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 32 proven. 1 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 13:11:09,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013241000] [2020-12-22 13:11:09,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668301688] [2020-12-22 13:11:09,190 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 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 13:11:10,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:11:10,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:11:10,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 1915 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:11:10,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:10,982 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 13:11:10,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:11:10,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:11:10,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756384583] [2020-12-22 13:11:10,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:10,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:10,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:10,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:10,985 INFO L87 Difference]: Start difference. First operand 10718 states and 14646 transitions. Second operand 3 states. [2020-12-22 13:11:11,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:11,832 INFO L93 Difference]: Finished difference Result 24132 states and 33131 transitions. [2020-12-22 13:11:11,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:11,833 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2020-12-22 13:11:11,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:11,877 INFO L225 Difference]: With dead ends: 24132 [2020-12-22 13:11:11,877 INFO L226 Difference]: Without dead ends: 13472 [2020-12-22 13:11:11,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13472 states. [2020-12-22 13:11:12,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13472 to 13144. [2020-12-22 13:11:12,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13144 states. [2020-12-22 13:11:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13144 states to 13144 states and 18099 transitions. [2020-12-22 13:11:12,823 INFO L78 Accepts]: Start accepts. Automaton has 13144 states and 18099 transitions. Word has length 129 [2020-12-22 13:11:12,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:12,823 INFO L481 AbstractCegarLoop]: Abstraction has 13144 states and 18099 transitions. [2020-12-22 13:11:12,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 13144 states and 18099 transitions. [2020-12-22 13:11:12,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-12-22 13:11:12,836 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:12,837 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:13,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:13,051 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:13,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:13,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1118618938, now seen corresponding path program 1 times [2020-12-22 13:11:13,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:13,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343641221] [2020-12-22 13:11:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:13,234 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 55 proven. 2 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-12-22 13:11:13,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343641221] [2020-12-22 13:11:13,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101029410] [2020-12-22 13:11:13,236 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 13:11:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:13,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 1817 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:11:14,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:14,117 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-22 13:11:14,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:11:14,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:11:14,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308330260] [2020-12-22 13:11:14,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:14,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:14,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:14,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:14,120 INFO L87 Difference]: Start difference. First operand 13144 states and 18099 transitions. Second operand 3 states. [2020-12-22 13:11:16,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:16,001 INFO L93 Difference]: Finished difference Result 25980 states and 35791 transitions. [2020-12-22 13:11:16,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:16,002 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 129 [2020-12-22 13:11:16,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:16,048 INFO L225 Difference]: With dead ends: 25980 [2020-12-22 13:11:16,049 INFO L226 Difference]: Without dead ends: 13149 [2020-12-22 13:11:16,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:16,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13149 states. [2020-12-22 13:11:16,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13149 to 13144. [2020-12-22 13:11:16,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13144 states. [2020-12-22 13:11:16,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13144 states to 13144 states and 18044 transitions. [2020-12-22 13:11:16,762 INFO L78 Accepts]: Start accepts. Automaton has 13144 states and 18044 transitions. Word has length 129 [2020-12-22 13:11:16,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:16,762 INFO L481 AbstractCegarLoop]: Abstraction has 13144 states and 18044 transitions. [2020-12-22 13:11:16,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:16,762 INFO L276 IsEmpty]: Start isEmpty. Operand 13144 states and 18044 transitions. [2020-12-22 13:11:16,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 13:11:16,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:16,780 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:16,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 13:11:16,996 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:16,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:16,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1372127101, now seen corresponding path program 1 times [2020-12-22 13:11:16,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:16,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004832107] [2020-12-22 13:11:16,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:17,191 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:17,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004832107] [2020-12-22 13:11:17,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:17,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:11:17,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544113931] [2020-12-22 13:11:17,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:11:17,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:17,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:11:17,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:11:17,195 INFO L87 Difference]: Start difference. First operand 13144 states and 18044 transitions. Second operand 3 states. [2020-12-22 13:11:17,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:17,952 INFO L93 Difference]: Finished difference Result 26007 states and 35725 transitions. [2020-12-22 13:11:17,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:11:17,952 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 130 [2020-12-22 13:11:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:17,996 INFO L225 Difference]: With dead ends: 26007 [2020-12-22 13:11:17,996 INFO L226 Difference]: Without dead ends: 13176 [2020-12-22 13:11:18,021 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 13:11:18,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13176 states. [2020-12-22 13:11:18,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13176 to 13160. [2020-12-22 13:11:18,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13160 states. [2020-12-22 13:11:18,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13160 states to 13160 states and 18060 transitions. [2020-12-22 13:11:18,612 INFO L78 Accepts]: Start accepts. Automaton has 13160 states and 18060 transitions. Word has length 130 [2020-12-22 13:11:18,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:18,612 INFO L481 AbstractCegarLoop]: Abstraction has 13160 states and 18060 transitions. [2020-12-22 13:11:18,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:11:18,612 INFO L276 IsEmpty]: Start isEmpty. Operand 13160 states and 18060 transitions. [2020-12-22 13:11:18,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-12-22 13:11:18,623 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:18,623 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:18,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 13:11:18,624 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:18,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:18,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1086317855, now seen corresponding path program 1 times [2020-12-22 13:11:18,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:18,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067738671] [2020-12-22 13:11:18,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:18,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067738671] [2020-12-22 13:11:18,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293596962] [2020-12-22 13:11:18,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:11:19,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:19,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 1900 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 13:11:19,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:19,781 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 38 proven. 1 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:19,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:11:19,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-22 13:11:19,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554300750] [2020-12-22 13:11:19,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:11:19,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:19,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:11:19,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:19,783 INFO L87 Difference]: Start difference. First operand 13160 states and 18060 transitions. Second operand 5 states. [2020-12-22 13:11:20,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:20,434 INFO L93 Difference]: Finished difference Result 26055 states and 35773 transitions. [2020-12-22 13:11:20,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:11:20,435 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-12-22 13:11:20,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:20,480 INFO L225 Difference]: With dead ends: 26055 [2020-12-22 13:11:20,480 INFO L226 Difference]: Without dead ends: 13208 [2020-12-22 13:11:20,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 132 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 13:11:20,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13208 states. [2020-12-22 13:11:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13208 to 13192. [2020-12-22 13:11:21,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13192 states. [2020-12-22 13:11:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13192 states to 13192 states and 18092 transitions. [2020-12-22 13:11:21,329 INFO L78 Accepts]: Start accepts. Automaton has 13192 states and 18092 transitions. Word has length 132 [2020-12-22 13:11:21,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:21,330 INFO L481 AbstractCegarLoop]: Abstraction has 13192 states and 18092 transitions. [2020-12-22 13:11:21,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:11:21,330 INFO L276 IsEmpty]: Start isEmpty. Operand 13192 states and 18092 transitions. [2020-12-22 13:11:21,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 13:11:21,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:21,343 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:21,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 13:11:21,557 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:21,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:21,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1419907771, now seen corresponding path program 2 times [2020-12-22 13:11:21,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:21,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648105717] [2020-12-22 13:11:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 13:11:21,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648105717] [2020-12-22 13:11:21,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:11:21,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:11:21,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435313464] [2020-12-22 13:11:21,770 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:11:21,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:21,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:11:21,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:11:21,771 INFO L87 Difference]: Start difference. First operand 13192 states and 18092 transitions. Second operand 5 states. [2020-12-22 13:11:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:23,721 INFO L93 Difference]: Finished difference Result 61378 states and 83826 transitions. [2020-12-22 13:11:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:11:23,721 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 134 [2020-12-22 13:11:23,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:23,868 INFO L225 Difference]: With dead ends: 61378 [2020-12-22 13:11:23,868 INFO L226 Difference]: Without dead ends: 48499 [2020-12-22 13:11:23,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:11:23,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48499 states. [2020-12-22 13:11:25,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48499 to 13304. [2020-12-22 13:11:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13304 states. [2020-12-22 13:11:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13304 states to 13304 states and 18260 transitions. [2020-12-22 13:11:25,127 INFO L78 Accepts]: Start accepts. Automaton has 13304 states and 18260 transitions. Word has length 134 [2020-12-22 13:11:25,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:25,127 INFO L481 AbstractCegarLoop]: Abstraction has 13304 states and 18260 transitions. [2020-12-22 13:11:25,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:11:25,128 INFO L276 IsEmpty]: Start isEmpty. Operand 13304 states and 18260 transitions. [2020-12-22 13:11:25,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-12-22 13:11:25,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:25,139 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:25,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 13:11:25,139 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:25,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:25,140 INFO L82 PathProgramCache]: Analyzing trace with hash 201416472, now seen corresponding path program 1 times [2020-12-22 13:11:25,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:25,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686648331] [2020-12-22 13:11:25,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:25,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:25,310 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:25,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686648331] [2020-12-22 13:11:25,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961194111] [2020-12-22 13:11:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:11:26,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:26,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:11:26,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 4 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:26,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:11:26,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 13:11:26,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273949723] [2020-12-22 13:11:26,197 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:11:26,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:26,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:11:26,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:11:26,198 INFO L87 Difference]: Start difference. First operand 13304 states and 18260 transitions. Second operand 6 states. [2020-12-22 13:11:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:27,242 INFO L93 Difference]: Finished difference Result 26343 states and 36173 transitions. [2020-12-22 13:11:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:11:27,243 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 134 [2020-12-22 13:11:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:27,289 INFO L225 Difference]: With dead ends: 26343 [2020-12-22 13:11:27,290 INFO L226 Difference]: Without dead ends: 13352 [2020-12-22 13:11:27,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 134 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 13:11:27,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13352 states. [2020-12-22 13:11:28,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13352 to 13336. [2020-12-22 13:11:28,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13336 states. [2020-12-22 13:11:28,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13336 states to 13336 states and 18292 transitions. [2020-12-22 13:11:28,113 INFO L78 Accepts]: Start accepts. Automaton has 13336 states and 18292 transitions. Word has length 134 [2020-12-22 13:11:28,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:28,113 INFO L481 AbstractCegarLoop]: Abstraction has 13336 states and 18292 transitions. [2020-12-22 13:11:28,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:11:28,113 INFO L276 IsEmpty]: Start isEmpty. Operand 13336 states and 18292 transitions. [2020-12-22 13:11:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 13:11:28,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:28,122 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:28,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:28,323 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:28,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1341221452, now seen corresponding path program 2 times [2020-12-22 13:11:28,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:28,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431587819] [2020-12-22 13:11:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:28,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:28,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431587819] [2020-12-22 13:11:28,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595422593] [2020-12-22 13:11:28,542 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 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 13:11:30,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:11:30,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:11:30,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1903 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:11:30,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:30,263 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:30,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:11:30,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 13:11:30,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430001061] [2020-12-22 13:11:30,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:11:30,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:30,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:11:30,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:11:30,265 INFO L87 Difference]: Start difference. First operand 13336 states and 18292 transitions. Second operand 7 states. [2020-12-22 13:11:31,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:31,125 INFO L93 Difference]: Finished difference Result 26407 states and 36237 transitions. [2020-12-22 13:11:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:11:31,126 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 136 [2020-12-22 13:11:31,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:31,165 INFO L225 Difference]: With dead ends: 26407 [2020-12-22 13:11:31,166 INFO L226 Difference]: Without dead ends: 13384 [2020-12-22 13:11:31,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 136 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 13:11:31,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13384 states. [2020-12-22 13:11:31,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13384 to 13368. [2020-12-22 13:11:31,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13368 states. [2020-12-22 13:11:32,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13368 states to 13368 states and 18324 transitions. [2020-12-22 13:11:32,074 INFO L78 Accepts]: Start accepts. Automaton has 13368 states and 18324 transitions. Word has length 136 [2020-12-22 13:11:32,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:32,074 INFO L481 AbstractCegarLoop]: Abstraction has 13368 states and 18324 transitions. [2020-12-22 13:11:32,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:11:32,074 INFO L276 IsEmpty]: Start isEmpty. Operand 13368 states and 18324 transitions. [2020-12-22 13:11:32,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-12-22 13:11:32,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:32,083 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:32,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:32,285 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:32,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:32,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2052549296, now seen corresponding path program 3 times [2020-12-22 13:11:32,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:32,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105127943] [2020-12-22 13:11:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:32,486 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:32,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105127943] [2020-12-22 13:11:32,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502346152] [2020-12-22 13:11:32,487 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 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 13:11:34,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 13:11:34,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:11:34,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 1697 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 13:11:34,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2020-12-22 13:11:34,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:11:34,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2020-12-22 13:11:34,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747501531] [2020-12-22 13:11:34,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:11:34,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:34,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:11:34,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:11:34,894 INFO L87 Difference]: Start difference. First operand 13368 states and 18324 transitions. Second operand 5 states. [2020-12-22 13:11:37,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:37,515 INFO L93 Difference]: Finished difference Result 48903 states and 66846 transitions. [2020-12-22 13:11:37,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 13:11:37,517 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 138 [2020-12-22 13:11:37,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:37,601 INFO L225 Difference]: With dead ends: 48903 [2020-12-22 13:11:37,601 INFO L226 Difference]: Without dead ends: 35848 [2020-12-22 13:11:37,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:11:37,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35848 states. [2020-12-22 13:11:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35848 to 13496. [2020-12-22 13:11:39,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13496 states. [2020-12-22 13:11:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13496 states to 13496 states and 18484 transitions. [2020-12-22 13:11:39,212 INFO L78 Accepts]: Start accepts. Automaton has 13496 states and 18484 transitions. Word has length 138 [2020-12-22 13:11:39,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:39,213 INFO L481 AbstractCegarLoop]: Abstraction has 13496 states and 18484 transitions. [2020-12-22 13:11:39,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:11:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 13496 states and 18484 transitions. [2020-12-22 13:11:39,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-12-22 13:11:39,222 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:39,222 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:39,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:39,426 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:39,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:39,427 INFO L82 PathProgramCache]: Analyzing trace with hash -1245467732, now seen corresponding path program 1 times [2020-12-22 13:11:39,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:39,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322689524] [2020-12-22 13:11:39,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:39,616 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:39,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322689524] [2020-12-22 13:11:39,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884093013] [2020-12-22 13:11:39,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:11:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:40,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 1931 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:11:40,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:40,594 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 38 proven. 16 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:40,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:11:40,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 13:11:40,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62833402] [2020-12-22 13:11:40,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:11:40,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:40,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:11:40,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:11:40,596 INFO L87 Difference]: Start difference. First operand 13496 states and 18484 transitions. Second operand 8 states. [2020-12-22 13:11:41,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:41,361 INFO L93 Difference]: Finished difference Result 26727 states and 36621 transitions. [2020-12-22 13:11:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:11:41,363 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 140 [2020-12-22 13:11:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:41,398 INFO L225 Difference]: With dead ends: 26727 [2020-12-22 13:11:41,398 INFO L226 Difference]: Without dead ends: 13544 [2020-12-22 13:11:41,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 140 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 13:11:41,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13544 states. [2020-12-22 13:11:42,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13544 to 13528. [2020-12-22 13:11:42,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13528 states. [2020-12-22 13:11:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13528 states to 13528 states and 18516 transitions. [2020-12-22 13:11:42,492 INFO L78 Accepts]: Start accepts. Automaton has 13528 states and 18516 transitions. Word has length 140 [2020-12-22 13:11:42,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:42,492 INFO L481 AbstractCegarLoop]: Abstraction has 13528 states and 18516 transitions. [2020-12-22 13:11:42,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:11:42,492 INFO L276 IsEmpty]: Start isEmpty. Operand 13528 states and 18516 transitions. [2020-12-22 13:11:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-12-22 13:11:42,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:42,500 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:42,700 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:11:42,701 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:42,702 INFO L82 PathProgramCache]: Analyzing trace with hash 685538632, now seen corresponding path program 2 times [2020-12-22 13:11:42,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:42,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979052580] [2020-12-22 13:11:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:42,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:42,914 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:42,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979052580] [2020-12-22 13:11:42,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882323288] [2020-12-22 13:11:42,914 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 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 13:11:44,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:11:44,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:11:44,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 1937 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 13:11:44,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:44,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:11:44,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 13:11:44,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607693636] [2020-12-22 13:11:44,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 13:11:44,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:44,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 13:11:44,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:11:44,604 INFO L87 Difference]: Start difference. First operand 13528 states and 18516 transitions. Second operand 9 states. [2020-12-22 13:11:45,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:45,611 INFO L93 Difference]: Finished difference Result 26791 states and 36685 transitions. [2020-12-22 13:11:45,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:11:45,612 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 142 [2020-12-22 13:11:45,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:45,643 INFO L225 Difference]: With dead ends: 26791 [2020-12-22 13:11:45,643 INFO L226 Difference]: Without dead ends: 13576 [2020-12-22 13:11:45,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 142 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 13:11:45,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13576 states. [2020-12-22 13:11:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13576 to 13560. [2020-12-22 13:11:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13560 states. [2020-12-22 13:11:46,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13560 states to 13560 states and 18548 transitions. [2020-12-22 13:11:46,584 INFO L78 Accepts]: Start accepts. Automaton has 13560 states and 18548 transitions. Word has length 142 [2020-12-22 13:11:46,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:46,584 INFO L481 AbstractCegarLoop]: Abstraction has 13560 states and 18548 transitions. [2020-12-22 13:11:46,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 13:11:46,584 INFO L276 IsEmpty]: Start isEmpty. Operand 13560 states and 18548 transitions. [2020-12-22 13:11:46,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-12-22 13:11:46,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:46,591 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:11:46,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 13:11:46,807 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:46,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:46,808 INFO L82 PathProgramCache]: Analyzing trace with hash 956782564, now seen corresponding path program 3 times [2020-12-22 13:11:46,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:46,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950742182] [2020-12-22 13:11:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:47,028 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:11:47,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950742182] [2020-12-22 13:11:47,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859567880] [2020-12-22 13:11:47,028 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 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 13:11:49,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 13:11:49,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:11:49,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 1719 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 13:11:49,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:49,840 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-22 13:11:49,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:11:49,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 13 [2020-12-22 13:11:49,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148862472] [2020-12-22 13:11:49,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:11:49,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:49,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:11:49,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:11:49,842 INFO L87 Difference]: Start difference. First operand 13560 states and 18548 transitions. Second operand 6 states. [2020-12-22 13:11:54,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:54,140 INFO L93 Difference]: Finished difference Result 70187 states and 96180 transitions. [2020-12-22 13:11:54,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 13:11:54,141 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2020-12-22 13:11:54,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:54,221 INFO L225 Difference]: With dead ends: 70187 [2020-12-22 13:11:54,222 INFO L226 Difference]: Without dead ends: 56940 [2020-12-22 13:11:54,241 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-12-22 13:11:54,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56940 states. [2020-12-22 13:11:55,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56940 to 13624. [2020-12-22 13:11:55,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13624 states. [2020-12-22 13:11:55,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13624 states to 13624 states and 18612 transitions. [2020-12-22 13:11:55,480 INFO L78 Accepts]: Start accepts. Automaton has 13624 states and 18612 transitions. Word has length 144 [2020-12-22 13:11:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:11:55,481 INFO L481 AbstractCegarLoop]: Abstraction has 13624 states and 18612 transitions. [2020-12-22 13:11:55,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:11:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 13624 states and 18612 transitions. [2020-12-22 13:11:55,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 13:11:55,491 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:11:55,491 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 3, 3, 3, 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, 1, 1, 1, 1, 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 13:11:55,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 13:11:55,707 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:11:55,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:11:55,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1606628683, now seen corresponding path program 1 times [2020-12-22 13:11:55,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:11:55,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313087928] [2020-12-22 13:11:55,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:11:55,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 65 proven. 8 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-12-22 13:11:55,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313087928] [2020-12-22 13:11:55,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707974951] [2020-12-22 13:11:55,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:11:57,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:11:57,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 2047 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:11:57,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:11:57,240 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 1 [2020-12-22 13:11:57,333 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:11:57,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:11:57,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2020-12-22 13:11:57,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040591801] [2020-12-22 13:11:57,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:11:57,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:11:57,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:11:57,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:11:57,335 INFO L87 Difference]: Start difference. First operand 13624 states and 18612 transitions. Second operand 5 states. [2020-12-22 13:11:59,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:11:59,790 INFO L93 Difference]: Finished difference Result 37500 states and 51166 transitions. [2020-12-22 13:11:59,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:11:59,790 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 146 [2020-12-22 13:11:59,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:11:59,824 INFO L225 Difference]: With dead ends: 37500 [2020-12-22 13:11:59,824 INFO L226 Difference]: Without dead ends: 23934 [2020-12-22 13:11:59,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:11:59,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23934 states. [2020-12-22 13:12:00,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23934 to 13729. [2020-12-22 13:12:00,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13729 states. [2020-12-22 13:12:00,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13729 states to 13729 states and 18717 transitions. [2020-12-22 13:12:00,917 INFO L78 Accepts]: Start accepts. Automaton has 13729 states and 18717 transitions. Word has length 146 [2020-12-22 13:12:00,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:00,917 INFO L481 AbstractCegarLoop]: Abstraction has 13729 states and 18717 transitions. [2020-12-22 13:12:00,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:12:00,917 INFO L276 IsEmpty]: Start isEmpty. Operand 13729 states and 18717 transitions. [2020-12-22 13:12:00,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 13:12:00,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:00,924 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:01,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 13:12:01,138 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:01,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:01,139 INFO L82 PathProgramCache]: Analyzing trace with hash 933941352, now seen corresponding path program 1 times [2020-12-22 13:12:01,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:01,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80223031] [2020-12-22 13:12:01,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:01,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:01,402 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:12:01,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80223031] [2020-12-22 13:12:01,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692667601] [2020-12-22 13:12:01,403 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 13:12:02,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 1965 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-22 13:12:02,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:02,342 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 38 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:12:02,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:12:02,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 13:12:02,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174207327] [2020-12-22 13:12:02,344 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:12:02,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:02,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:12:02,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:12:02,345 INFO L87 Difference]: Start difference. First operand 13729 states and 18717 transitions. Second operand 10 states. [2020-12-22 13:12:03,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:03,508 INFO L93 Difference]: Finished difference Result 27188 states and 37082 transitions. [2020-12-22 13:12:03,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 13:12:03,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 146 [2020-12-22 13:12:03,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:03,530 INFO L225 Difference]: With dead ends: 27188 [2020-12-22 13:12:03,531 INFO L226 Difference]: Without dead ends: 13777 [2020-12-22 13:12:03,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 146 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 13:12:03,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13777 states. [2020-12-22 13:12:04,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13777 to 13761. [2020-12-22 13:12:04,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13761 states. [2020-12-22 13:12:04,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13761 states to 13761 states and 18749 transitions. [2020-12-22 13:12:04,613 INFO L78 Accepts]: Start accepts. Automaton has 13761 states and 18749 transitions. Word has length 146 [2020-12-22 13:12:04,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:04,613 INFO L481 AbstractCegarLoop]: Abstraction has 13761 states and 18749 transitions. [2020-12-22 13:12:04,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:12:04,614 INFO L276 IsEmpty]: Start isEmpty. Operand 13761 states and 18749 transitions. [2020-12-22 13:12:04,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-12-22 13:12:04,619 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:04,619 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:04,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:12:04,833 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:04,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:04,834 INFO L82 PathProgramCache]: Analyzing trace with hash 98618116, now seen corresponding path program 1 times [2020-12-22 13:12:04,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:04,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35875369] [2020-12-22 13:12:04,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:04,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:05,296 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2020-12-22 13:12:05,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35875369] [2020-12-22 13:12:05,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:12:05,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 13:12:05,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864586204] [2020-12-22 13:12:05,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 13:12:05,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:05,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 13:12:05,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:12:05,298 INFO L87 Difference]: Start difference. First operand 13761 states and 18749 transitions. Second operand 9 states. [2020-12-22 13:12:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:17,840 INFO L93 Difference]: Finished difference Result 84132 states and 114334 transitions. [2020-12-22 13:12:17,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 13:12:17,841 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 147 [2020-12-22 13:12:17,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:17,941 INFO L225 Difference]: With dead ends: 84132 [2020-12-22 13:12:17,941 INFO L226 Difference]: Without dead ends: 70689 [2020-12-22 13:12:17,971 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=896, Invalid=3796, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 13:12:18,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70689 states. [2020-12-22 13:12:19,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70689 to 13761. [2020-12-22 13:12:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13761 states. [2020-12-22 13:12:19,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13761 states to 13761 states and 18741 transitions. [2020-12-22 13:12:19,928 INFO L78 Accepts]: Start accepts. Automaton has 13761 states and 18741 transitions. Word has length 147 [2020-12-22 13:12:19,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:19,929 INFO L481 AbstractCegarLoop]: Abstraction has 13761 states and 18741 transitions. [2020-12-22 13:12:19,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 13:12:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 13761 states and 18741 transitions. [2020-12-22 13:12:19,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-12-22 13:12:19,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:19,935 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:19,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 13:12:19,935 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:19,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:19,935 INFO L82 PathProgramCache]: Analyzing trace with hash -846372092, now seen corresponding path program 2 times [2020-12-22 13:12:19,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:19,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829303017] [2020-12-22 13:12:19,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:20,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:20,178 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 38 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:12:20,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829303017] [2020-12-22 13:12:20,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739342239] [2020-12-22 13:12:20,179 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 13:12:21,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:12:21,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:12:21,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 1971 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 13:12:21,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:22,123 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 38 proven. 49 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:12:22,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:12:22,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 13:12:22,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866194320] [2020-12-22 13:12:22,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 13:12:22,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:22,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 13:12:22,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-22 13:12:22,125 INFO L87 Difference]: Start difference. First operand 13761 states and 18741 transitions. Second operand 11 states. [2020-12-22 13:12:23,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:23,848 INFO L93 Difference]: Finished difference Result 27252 states and 37130 transitions. [2020-12-22 13:12:23,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 13:12:23,849 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 148 [2020-12-22 13:12:23,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:23,877 INFO L225 Difference]: With dead ends: 27252 [2020-12-22 13:12:23,877 INFO L226 Difference]: Without dead ends: 13809 [2020-12-22 13:12:23,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 148 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 13:12:23,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13809 states. [2020-12-22 13:12:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13809 to 13793. [2020-12-22 13:12:25,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13793 states. [2020-12-22 13:12:25,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13793 states to 13793 states and 18773 transitions. [2020-12-22 13:12:25,586 INFO L78 Accepts]: Start accepts. Automaton has 13793 states and 18773 transitions. Word has length 148 [2020-12-22 13:12:25,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:25,586 INFO L481 AbstractCegarLoop]: Abstraction has 13793 states and 18773 transitions. [2020-12-22 13:12:25,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 13:12:25,586 INFO L276 IsEmpty]: Start isEmpty. Operand 13793 states and 18773 transitions. [2020-12-22 13:12:25,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-12-22 13:12:25,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:25,592 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:25,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 13:12:25,799 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:25,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:25,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1964359328, now seen corresponding path program 3 times [2020-12-22 13:12:25,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:25,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296173063] [2020-12-22 13:12:25,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:26,096 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 38 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:12:26,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296173063] [2020-12-22 13:12:26,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1889553158] [2020-12-22 13:12:26,097 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 13:12:28,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 13:12:28,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:12:28,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 1741 conjuncts, 44 conjunts are in the unsatisfiable core [2020-12-22 13:12:28,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2020-12-22 13:12:28,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:12:28,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [11] total 18 [2020-12-22 13:12:28,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695625745] [2020-12-22 13:12:28,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 13:12:28,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:28,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 13:12:28,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-12-22 13:12:28,902 INFO L87 Difference]: Start difference. First operand 13793 states and 18773 transitions. Second operand 9 states. [2020-12-22 13:12:44,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:44,793 INFO L93 Difference]: Finished difference Result 86052 states and 116494 transitions. [2020-12-22 13:12:44,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-12-22 13:12:44,795 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 150 [2020-12-22 13:12:44,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:44,897 INFO L225 Difference]: With dead ends: 86052 [2020-12-22 13:12:44,897 INFO L226 Difference]: Without dead ends: 72577 [2020-12-22 13:12:44,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1758 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=950, Invalid=5056, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 13:12:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72577 states. [2020-12-22 13:12:47,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72577 to 13793. [2020-12-22 13:12:47,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13793 states. [2020-12-22 13:12:47,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13793 states to 13793 states and 18765 transitions. [2020-12-22 13:12:47,082 INFO L78 Accepts]: Start accepts. Automaton has 13793 states and 18765 transitions. Word has length 150 [2020-12-22 13:12:47,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:47,083 INFO L481 AbstractCegarLoop]: Abstraction has 13793 states and 18765 transitions. [2020-12-22 13:12:47,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 13:12:47,083 INFO L276 IsEmpty]: Start isEmpty. Operand 13793 states and 18765 transitions. [2020-12-22 13:12:47,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-12-22 13:12:47,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:47,090 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 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, 1, 1, 1, 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 13:12:47,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 13:12:47,305 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:47,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:47,306 INFO L82 PathProgramCache]: Analyzing trace with hash -620383506, now seen corresponding path program 1 times [2020-12-22 13:12:47,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:47,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111599814] [2020-12-22 13:12:47,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:47,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:47,931 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:12:47,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111599814] [2020-12-22 13:12:47,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:12:47,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:12:47,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770697535] [2020-12-22 13:12:47,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:12:47,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:47,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:12:47,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:12:47,934 INFO L87 Difference]: Start difference. First operand 13793 states and 18765 transitions. Second operand 4 states. [2020-12-22 13:12:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:52,761 INFO L93 Difference]: Finished difference Result 38518 states and 52446 transitions. [2020-12-22 13:12:52,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:12:52,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 153 [2020-12-22 13:12:52,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:52,802 INFO L225 Difference]: With dead ends: 38518 [2020-12-22 13:12:52,803 INFO L226 Difference]: Without dead ends: 25043 [2020-12-22 13:12:52,818 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 13:12:52,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25043 states. [2020-12-22 13:12:54,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25043 to 13825. [2020-12-22 13:12:54,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13825 states. [2020-12-22 13:12:54,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13825 states to 13825 states and 18797 transitions. [2020-12-22 13:12:54,686 INFO L78 Accepts]: Start accepts. Automaton has 13825 states and 18797 transitions. Word has length 153 [2020-12-22 13:12:54,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:54,686 INFO L481 AbstractCegarLoop]: Abstraction has 13825 states and 18797 transitions. [2020-12-22 13:12:54,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:12:54,686 INFO L276 IsEmpty]: Start isEmpty. Operand 13825 states and 18797 transitions. [2020-12-22 13:12:54,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-12-22 13:12:54,693 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:54,693 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:54,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-12-22 13:12:54,693 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:54,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:54,694 INFO L82 PathProgramCache]: Analyzing trace with hash 16218476, now seen corresponding path program 1 times [2020-12-22 13:12:54,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:54,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230600422] [2020-12-22 13:12:54,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:12:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:54,914 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 38 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:12:54,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230600422] [2020-12-22 13:12:54,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958123282] [2020-12-22 13:12:54,915 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 13:12:55,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:12:55,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 2047 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 13:12:55,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:12:55,959 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 38 proven. 64 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:12:55,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:12:55,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 13:12:55,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077868480] [2020-12-22 13:12:55,960 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 13:12:55,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:12:55,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 13:12:55,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:12:55,961 INFO L87 Difference]: Start difference. First operand 13825 states and 18797 transitions. Second operand 12 states. [2020-12-22 13:12:57,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:12:57,986 INFO L93 Difference]: Finished difference Result 27380 states and 37242 transitions. [2020-12-22 13:12:57,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 13:12:57,987 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 157 [2020-12-22 13:12:57,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:12:58,010 INFO L225 Difference]: With dead ends: 27380 [2020-12-22 13:12:58,010 INFO L226 Difference]: Without dead ends: 13873 [2020-12-22 13:12:58,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 157 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 13:12:58,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13873 states. [2020-12-22 13:12:59,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13873 to 13857. [2020-12-22 13:12:59,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13857 states. [2020-12-22 13:12:59,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13857 states to 13857 states and 18829 transitions. [2020-12-22 13:12:59,760 INFO L78 Accepts]: Start accepts. Automaton has 13857 states and 18829 transitions. Word has length 157 [2020-12-22 13:12:59,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:12:59,761 INFO L481 AbstractCegarLoop]: Abstraction has 13857 states and 18829 transitions. [2020-12-22 13:12:59,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 13:12:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand 13857 states and 18829 transitions. [2020-12-22 13:12:59,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 13:12:59,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:12:59,770 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:12:59,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 13:12:59,984 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:12:59,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:12:59,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1248226640, now seen corresponding path program 2 times [2020-12-22 13:12:59,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:12:59,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113821453] [2020-12-22 13:12:59,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:00,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 38 proven. 81 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:13:00,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113821453] [2020-12-22 13:13:00,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341330113] [2020-12-22 13:13:00,277 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 13:13:01,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:13:01,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:13:01,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 2053 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 13:13:01,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:13:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 38 proven. 81 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:13:01,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:13:01,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 13:13:01,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118615230] [2020-12-22 13:13:01,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 13:13:01,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:01,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 13:13:01,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:13:01,994 INFO L87 Difference]: Start difference. First operand 13857 states and 18829 transitions. Second operand 13 states. [2020-12-22 13:13:04,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:04,064 INFO L93 Difference]: Finished difference Result 27444 states and 37306 transitions. [2020-12-22 13:13:04,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 13:13:04,065 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 159 [2020-12-22 13:13:04,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:04,092 INFO L225 Difference]: With dead ends: 27444 [2020-12-22 13:13:04,092 INFO L226 Difference]: Without dead ends: 13905 [2020-12-22 13:13:04,108 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-12-22 13:13:04,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13905 states. [2020-12-22 13:13:05,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13905 to 13889. [2020-12-22 13:13:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13889 states. [2020-12-22 13:13:05,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13889 states to 13889 states and 18861 transitions. [2020-12-22 13:13:05,852 INFO L78 Accepts]: Start accepts. Automaton has 13889 states and 18861 transitions. Word has length 159 [2020-12-22 13:13:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:05,852 INFO L481 AbstractCegarLoop]: Abstraction has 13889 states and 18861 transitions. [2020-12-22 13:13:05,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 13:13:05,853 INFO L276 IsEmpty]: Start isEmpty. Operand 13889 states and 18861 transitions. [2020-12-22 13:13:05,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 13:13:05,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:05,859 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:13:06,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 13:13:06,063 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:06,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:06,064 INFO L82 PathProgramCache]: Analyzing trace with hash -202901452, now seen corresponding path program 3 times [2020-12-22 13:13:06,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:06,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130743016] [2020-12-22 13:13:06,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:06,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:06,320 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 38 proven. 100 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:13:06,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130743016] [2020-12-22 13:13:06,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940558708] [2020-12-22 13:13:06,321 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 13:13:09,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 13:13:09,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:13:09,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 1811 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 13:13:09,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:13:09,795 INFO L134 CoverageAnalysis]: Checked inductivity of 159 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-12-22 13:13:09,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:13:09,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [13] total 22 [2020-12-22 13:13:09,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981415531] [2020-12-22 13:13:09,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 13:13:09,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:09,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 13:13:09,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-12-22 13:13:09,798 INFO L87 Difference]: Start difference. First operand 13889 states and 18861 transitions. Second operand 11 states. [2020-12-22 13:13:32,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:32,216 INFO L93 Difference]: Finished difference Result 91110 states and 122996 transitions. [2020-12-22 13:13:32,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-22 13:13:32,216 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 161 [2020-12-22 13:13:32,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:32,353 INFO L225 Difference]: With dead ends: 91110 [2020-12-22 13:13:32,353 INFO L226 Difference]: Without dead ends: 72851 [2020-12-22 13:13:32,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2834 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1562, Invalid=7944, Unknown=0, NotChecked=0, Total=9506 [2020-12-22 13:13:32,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72851 states. [2020-12-22 13:13:35,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72851 to 17315. [2020-12-22 13:13:35,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17315 states. [2020-12-22 13:13:35,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17315 states to 17315 states and 23415 transitions. [2020-12-22 13:13:35,925 INFO L78 Accepts]: Start accepts. Automaton has 17315 states and 23415 transitions. Word has length 161 [2020-12-22 13:13:35,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:35,926 INFO L481 AbstractCegarLoop]: Abstraction has 17315 states and 23415 transitions. [2020-12-22 13:13:35,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 13:13:35,926 INFO L276 IsEmpty]: Start isEmpty. Operand 17315 states and 23415 transitions. [2020-12-22 13:13:35,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-12-22 13:13:35,932 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:35,932 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:13:36,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:13:36,136 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:36,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:36,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1937736570, now seen corresponding path program 1 times [2020-12-22 13:13:36,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:36,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767974565] [2020-12-22 13:13:36,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:36,335 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:13:36,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767974565] [2020-12-22 13:13:36,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:13:36,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-12-22 13:13:36,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226189446] [2020-12-22 13:13:36,337 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:13:36,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:36,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:13:36,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:13:36,337 INFO L87 Difference]: Start difference. First operand 17315 states and 23415 transitions. Second operand 7 states. [2020-12-22 13:13:43,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:43,150 INFO L93 Difference]: Finished difference Result 48012 states and 64924 transitions. [2020-12-22 13:13:43,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 13:13:43,151 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 165 [2020-12-22 13:13:43,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:43,194 INFO L225 Difference]: With dead ends: 48012 [2020-12-22 13:13:43,194 INFO L226 Difference]: Without dead ends: 31015 [2020-12-22 13:13:43,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:13:43,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31015 states. [2020-12-22 13:13:46,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31015 to 17483. [2020-12-22 13:13:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17483 states. [2020-12-22 13:13:46,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17483 states to 17483 states and 23583 transitions. [2020-12-22 13:13:46,385 INFO L78 Accepts]: Start accepts. Automaton has 17483 states and 23583 transitions. Word has length 165 [2020-12-22 13:13:46,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:46,386 INFO L481 AbstractCegarLoop]: Abstraction has 17483 states and 23583 transitions. [2020-12-22 13:13:46,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:13:46,386 INFO L276 IsEmpty]: Start isEmpty. Operand 17483 states and 23583 transitions. [2020-12-22 13:13:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-12-22 13:13:46,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:46,397 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:13:46,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-12-22 13:13:46,398 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:46,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:46,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1179405428, now seen corresponding path program 1 times [2020-12-22 13:13:46,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:46,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904172523] [2020-12-22 13:13:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:46,745 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:13:46,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904172523] [2020-12-22 13:13:46,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979650583] [2020-12-22 13:13:46,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:13:47,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:47,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 2298 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 13:13:47,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:13:47,910 INFO L134 CoverageAnalysis]: Checked inductivity of 236 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:13:47,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:13:47,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 13:13:47,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813450983] [2020-12-22 13:13:47,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 13:13:47,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:47,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 13:13:47,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:13:47,912 INFO L87 Difference]: Start difference. First operand 17483 states and 23583 transitions. Second operand 14 states. [2020-12-22 13:13:51,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:13:51,466 INFO L93 Difference]: Finished difference Result 34720 states and 46846 transitions. [2020-12-22 13:13:51,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 13:13:51,467 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 192 [2020-12-22 13:13:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:13:51,492 INFO L225 Difference]: With dead ends: 34720 [2020-12-22 13:13:51,492 INFO L226 Difference]: Without dead ends: 17555 [2020-12-22 13:13:51,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:13:51,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17555 states. [2020-12-22 13:13:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17555 to 17531. [2020-12-22 13:13:54,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17531 states. [2020-12-22 13:13:54,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17531 states to 17531 states and 23631 transitions. [2020-12-22 13:13:54,596 INFO L78 Accepts]: Start accepts. Automaton has 17531 states and 23631 transitions. Word has length 192 [2020-12-22 13:13:54,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:13:54,596 INFO L481 AbstractCegarLoop]: Abstraction has 17531 states and 23631 transitions. [2020-12-22 13:13:54,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 13:13:54,596 INFO L276 IsEmpty]: Start isEmpty. Operand 17531 states and 23631 transitions. [2020-12-22 13:13:54,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2020-12-22 13:13:54,603 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:13:54,603 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 7, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:13:54,803 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 13:13:54,804 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:13:54,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:13:54,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1806297816, now seen corresponding path program 2 times [2020-12-22 13:13:54,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:13:54,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592348311] [2020-12-22 13:13:54,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:13:54,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:13:55,205 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 81 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:13:55,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592348311] [2020-12-22 13:13:55,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408529402] [2020-12-22 13:13:55,206 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 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 13:13:56,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:13:56,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:13:56,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 2304 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 13:13:56,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:13:57,056 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 81 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:13:57,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:13:57,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 13:13:57,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133963861] [2020-12-22 13:13:57,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 13:13:57,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:13:57,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 13:13:57,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-12-22 13:13:57,058 INFO L87 Difference]: Start difference. First operand 17531 states and 23631 transitions. Second operand 15 states. [2020-12-22 13:14:00,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:14:00,413 INFO L93 Difference]: Finished difference Result 34816 states and 46942 transitions. [2020-12-22 13:14:00,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 13:14:00,414 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 194 [2020-12-22 13:14:00,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:14:00,440 INFO L225 Difference]: With dead ends: 34816 [2020-12-22 13:14:00,440 INFO L226 Difference]: Without dead ends: 17603 [2020-12-22 13:14:00,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 194 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 13:14:00,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17603 states. [2020-12-22 13:14:03,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17603 to 17579. [2020-12-22 13:14:03,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17579 states. [2020-12-22 13:14:03,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17579 states to 17579 states and 23679 transitions. [2020-12-22 13:14:03,559 INFO L78 Accepts]: Start accepts. Automaton has 17579 states and 23679 transitions. Word has length 194 [2020-12-22 13:14:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:14:03,560 INFO L481 AbstractCegarLoop]: Abstraction has 17579 states and 23679 transitions. [2020-12-22 13:14:03,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 13:14:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 17579 states and 23679 transitions. [2020-12-22 13:14:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-22 13:14:03,567 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:14:03,568 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 7, 5, 5, 5, 5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:14:03,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 13:14:03,769 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:14:03,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:14:03,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1340506052, now seen corresponding path program 3 times [2020-12-22 13:14:03,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:14:03,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562518730] [2020-12-22 13:14:03,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:14:03,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:14:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 81 proven. 144 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-12-22 13:14:04,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562518730] [2020-12-22 13:14:04,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088488454] [2020-12-22 13:14:04,141 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 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 13:14:06,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 13:14:06,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:14:06,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 60 conjunts are in the unsatisfiable core [2020-12-22 13:14:06,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:14:07,418 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 80 proven. 0 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-12-22 13:14:07,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:14:07,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [15] total 24 [2020-12-22 13:14:07,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115154073] [2020-12-22 13:14:07,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 13:14:07,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:14:07,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 13:14:07,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=424, Unknown=0, NotChecked=0, Total=552 [2020-12-22 13:14:07,420 INFO L87 Difference]: Start difference. First operand 17579 states and 23679 transitions. Second operand 11 states.