/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--ath6kl--ath6kl_usb.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:23:09,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:23:09,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:23:09,431 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:23:09,432 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:23:09,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:23:09,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:23:09,446 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:23:09,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:23:09,449 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:23:09,451 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:23:09,453 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:23:09,453 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:23:09,454 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:23:09,456 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:23:09,457 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:23:09,458 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:23:09,459 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:23:09,462 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:23:09,464 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:23:09,466 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:23:09,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:23:09,474 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:23:09,478 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:23:09,486 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:23:09,486 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:23:09,486 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:23:09,491 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:23:09,491 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:23:09,493 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:23:09,493 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:23:09,494 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:23:09,495 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:23:09,497 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:23:09,499 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:23:09,499 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:23:09,500 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:23:09,501 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:23:09,501 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:23:09,503 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:23:09,504 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:23:09,505 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:23:09,559 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:23:09,559 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:23:09,565 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:23:09,565 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:23:09,566 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:23:09,566 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:23:09,566 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:23:09,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:23:09,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:23:09,567 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:23:09,568 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:23:09,568 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:23:09,569 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:23:09,569 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:23:09,569 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:23:09,569 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:23:09,569 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:23:09,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:23:09,572 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:23:09,573 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:23:09,574 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:23:09,574 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:23:09,574 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:23:09,575 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:23:09,575 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:23:09,582 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:23:09,990 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:23:10,018 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:23:10,021 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:23:10,023 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:23:10,023 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:23:10,025 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--ath6kl--ath6kl_usb.ko-entry_point.cil.out.i [2020-12-22 13:23:10,105 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593b4bce8/8c5e5c98d5c8411fa15fbf6e714a8bbb/FLAGc391085d5 [2020-12-22 13:23:11,195 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:23:11,200 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--ath6kl--ath6kl_usb.ko-entry_point.cil.out.i [2020-12-22 13:23:11,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593b4bce8/8c5e5c98d5c8411fa15fbf6e714a8bbb/FLAGc391085d5 [2020-12-22 13:23:11,627 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/593b4bce8/8c5e5c98d5c8411fa15fbf6e714a8bbb [2020-12-22 13:23:11,631 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:23:11,633 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:23:11,635 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:23:11,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:23:11,640 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:23:11,641 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:23:11" (1/1) ... [2020-12-22 13:23:11,642 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5590861c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:11, skipping insertion in model container [2020-12-22 13:23:11,643 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:23:11" (1/1) ... [2020-12-22 13:23:11,652 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:23:11,810 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:23:12,914 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--ath6kl--ath6kl_usb.ko-entry_point.cil.out.i[190557,190570] [2020-12-22 13:23:13,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:23:13,614 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:23:13,825 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-linux-3.16-rc1/205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--ath6kl--ath6kl_usb.ko-entry_point.cil.out.i[190557,190570] [2020-12-22 13:23:14,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:23:14,378 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:23:14,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:14 WrapperNode [2020-12-22 13:23:14,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:23:14,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:23:14,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:23:14,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:23:14,390 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:14" (1/1) ... [2020-12-22 13:23:14,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:14" (1/1) ... [2020-12-22 13:23:14,707 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:23:14,708 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:23:14,708 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:23:14,709 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:23:14,719 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:14" (1/1) ... [2020-12-22 13:23:14,720 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:14" (1/1) ... [2020-12-22 13:23:14,759 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:14" (1/1) ... [2020-12-22 13:23:14,760 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:14" (1/1) ... [2020-12-22 13:23:14,987 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:14" (1/1) ... [2020-12-22 13:23:15,043 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:14" (1/1) ... [2020-12-22 13:23:15,080 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:14" (1/1) ... [2020-12-22 13:23:15,129 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:23:15,132 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:23:15,132 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:23:15,132 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:23:15,134 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:14" (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 13:23:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:23:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:23:15,313 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:23:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:23:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:23:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u16 [2020-12-22 13:23:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:23:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:23:15,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:23:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:23:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u32 [2020-12-22 13:23:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:23:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:23:15,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:23:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:23:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_u8 [2020-12-22 13:23:15,316 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:23:15,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:23:29,123 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:23:29,124 INFO L299 CfgBuilder]: Removed 1424 assume(true) statements. [2020-12-22 13:23:29,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:23:29 BoogieIcfgContainer [2020-12-22 13:23:29,128 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:23:29,130 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:23:29,130 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:23:29,134 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:23:29,134 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:23:11" (1/3) ... [2020-12-22 13:23:29,135 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2feabc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:23:29, skipping insertion in model container [2020-12-22 13:23:29,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:23:14" (2/3) ... [2020-12-22 13:23:29,136 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d2feabc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:23:29, skipping insertion in model container [2020-12-22 13:23:29,136 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:23:29" (3/3) ... [2020-12-22 13:23:29,138 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--wireless--ath--ath6kl--ath6kl_usb.ko-entry_point.cil.out.i [2020-12-22 13:23:29,145 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:23:29,151 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:23:29,172 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:23:29,209 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:23:29,210 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:23:29,210 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:23:29,210 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:23:29,210 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:23:29,210 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:23:29,211 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:23:29,211 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:23:29,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states. [2020-12-22 13:23:29,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 13:23:29,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:29,261 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] [2020-12-22 13:23:29,261 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:29,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:29,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1077921483, now seen corresponding path program 1 times [2020-12-22 13:23:29,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:29,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728321853] [2020-12-22 13:23:29,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:30,021 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 13:23:30,022 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728321853] [2020-12-22 13:23:30,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:30,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:30,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250524769] [2020-12-22 13:23:30,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:30,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:30,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:30,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:30,054 INFO L87 Difference]: Start difference. First operand 1211 states. Second operand 3 states. [2020-12-22 13:23:30,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:30,309 INFO L93 Difference]: Finished difference Result 2419 states and 3371 transitions. [2020-12-22 13:23:30,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:30,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 41 [2020-12-22 13:23:30,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:30,338 INFO L225 Difference]: With dead ends: 2419 [2020-12-22 13:23:30,338 INFO L226 Difference]: Without dead ends: 1205 [2020-12-22 13:23:30,346 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 13:23:30,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2020-12-22 13:23:30,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1205. [2020-12-22 13:23:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1205 states. [2020-12-22 13:23:30,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1602 transitions. [2020-12-22 13:23:30,482 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1602 transitions. Word has length 41 [2020-12-22 13:23:30,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:30,483 INFO L481 AbstractCegarLoop]: Abstraction has 1205 states and 1602 transitions. [2020-12-22 13:23:30,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:30,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1602 transitions. [2020-12-22 13:23:30,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 13:23:30,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:30,493 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 13:23:30,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:23:30,493 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:30,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:30,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1220483567, now seen corresponding path program 1 times [2020-12-22 13:23:30,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:30,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879098604] [2020-12-22 13:23:30,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:30,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:23:30,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879098604] [2020-12-22 13:23:30,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:30,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:30,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087173283] [2020-12-22 13:23:30,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:30,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:30,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:30,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:30,800 INFO L87 Difference]: Start difference. First operand 1205 states and 1602 transitions. Second operand 3 states. [2020-12-22 13:23:32,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:32,973 INFO L93 Difference]: Finished difference Result 3464 states and 4626 transitions. [2020-12-22 13:23:32,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:32,974 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 43 [2020-12-22 13:23:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:32,987 INFO L225 Difference]: With dead ends: 3464 [2020-12-22 13:23:32,987 INFO L226 Difference]: Without dead ends: 2323 [2020-12-22 13:23:32,990 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 13:23:32,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2020-12-22 13:23:33,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 2323. [2020-12-22 13:23:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2323 states. [2020-12-22 13:23:33,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2323 states to 2323 states and 3098 transitions. [2020-12-22 13:23:33,063 INFO L78 Accepts]: Start accepts. Automaton has 2323 states and 3098 transitions. Word has length 43 [2020-12-22 13:23:33,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:33,063 INFO L481 AbstractCegarLoop]: Abstraction has 2323 states and 3098 transitions. [2020-12-22 13:23:33,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:33,064 INFO L276 IsEmpty]: Start isEmpty. Operand 2323 states and 3098 transitions. [2020-12-22 13:23:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 13:23:33,068 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:33,069 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:33,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:23:33,069 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:33,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1842814587, now seen corresponding path program 1 times [2020-12-22 13:23:33,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:33,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253866607] [2020-12-22 13:23:33,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:33,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:23:33,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253866607] [2020-12-22 13:23:33,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:33,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:23:33,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152299907] [2020-12-22 13:23:33,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:23:33,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:33,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:23:33,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:23:33,438 INFO L87 Difference]: Start difference. First operand 2323 states and 3098 transitions. Second operand 5 states. [2020-12-22 13:23:34,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:34,062 INFO L93 Difference]: Finished difference Result 6839 states and 9139 transitions. [2020-12-22 13:23:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:23:34,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2020-12-22 13:23:34,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:34,086 INFO L225 Difference]: With dead ends: 6839 [2020-12-22 13:23:34,086 INFO L226 Difference]: Without dead ends: 4575 [2020-12-22 13:23:34,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:23:34,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4575 states. [2020-12-22 13:23:34,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4575 to 4535. [2020-12-22 13:23:34,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4535 states. [2020-12-22 13:23:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4535 states to 4535 states and 6050 transitions. [2020-12-22 13:23:34,321 INFO L78 Accepts]: Start accepts. Automaton has 4535 states and 6050 transitions. Word has length 51 [2020-12-22 13:23:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:34,322 INFO L481 AbstractCegarLoop]: Abstraction has 4535 states and 6050 transitions. [2020-12-22 13:23:34,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:23:34,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4535 states and 6050 transitions. [2020-12-22 13:23:34,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-12-22 13:23:34,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:34,331 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:23:34,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:23:34,331 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:34,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:34,333 INFO L82 PathProgramCache]: Analyzing trace with hash -683844340, now seen corresponding path program 1 times [2020-12-22 13:23:34,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:34,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313073465] [2020-12-22 13:23:34,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:34,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:34,564 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:23:34,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313073465] [2020-12-22 13:23:34,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:34,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:34,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552822215] [2020-12-22 13:23:34,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:34,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:34,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:34,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:34,568 INFO L87 Difference]: Start difference. First operand 4535 states and 6050 transitions. Second operand 3 states. [2020-12-22 13:23:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:35,097 INFO L93 Difference]: Finished difference Result 10801 states and 14385 transitions. [2020-12-22 13:23:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:35,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 100 [2020-12-22 13:23:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:35,130 INFO L225 Difference]: With dead ends: 10801 [2020-12-22 13:23:35,131 INFO L226 Difference]: Without dead ends: 6330 [2020-12-22 13:23:35,139 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 13:23:35,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6330 states. [2020-12-22 13:23:35,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6330 to 6323. [2020-12-22 13:23:35,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6323 states. [2020-12-22 13:23:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6323 states to 6323 states and 8402 transitions. [2020-12-22 13:23:35,366 INFO L78 Accepts]: Start accepts. Automaton has 6323 states and 8402 transitions. Word has length 100 [2020-12-22 13:23:35,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:35,367 INFO L481 AbstractCegarLoop]: Abstraction has 6323 states and 8402 transitions. [2020-12-22 13:23:35,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:35,367 INFO L276 IsEmpty]: Start isEmpty. Operand 6323 states and 8402 transitions. [2020-12-22 13:23:35,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-12-22 13:23:35,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:35,379 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:23:35,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:23:35,379 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:35,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:35,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1867636703, now seen corresponding path program 1 times [2020-12-22 13:23:35,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:35,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828371881] [2020-12-22 13:23:35,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:35,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:23:35,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828371881] [2020-12-22 13:23:35,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:35,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:35,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911413734] [2020-12-22 13:23:35,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:35,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:35,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:35,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:35,613 INFO L87 Difference]: Start difference. First operand 6323 states and 8402 transitions. Second operand 3 states. [2020-12-22 13:23:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:35,987 INFO L93 Difference]: Finished difference Result 15376 states and 20514 transitions. [2020-12-22 13:23:35,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:35,988 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 104 [2020-12-22 13:23:35,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:36,034 INFO L225 Difference]: With dead ends: 15376 [2020-12-22 13:23:36,034 INFO L226 Difference]: Without dead ends: 9117 [2020-12-22 13:23:36,047 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 13:23:36,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9117 states. [2020-12-22 13:23:36,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9117 to 9103. [2020-12-22 13:23:36,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9103 states. [2020-12-22 13:23:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9103 states to 9103 states and 12168 transitions. [2020-12-22 13:23:36,508 INFO L78 Accepts]: Start accepts. Automaton has 9103 states and 12168 transitions. Word has length 104 [2020-12-22 13:23:36,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:36,509 INFO L481 AbstractCegarLoop]: Abstraction has 9103 states and 12168 transitions. [2020-12-22 13:23:36,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand 9103 states and 12168 transitions. [2020-12-22 13:23:36,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-12-22 13:23:36,532 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:36,533 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 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 13:23:36,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:23:36,533 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:36,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:36,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1834598712, now seen corresponding path program 1 times [2020-12-22 13:23:36,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:36,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922912230] [2020-12-22 13:23:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:36,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:36,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:23:36,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922912230] [2020-12-22 13:23:36,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:36,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:36,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744081000] [2020-12-22 13:23:36,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:36,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:36,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:36,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:36,792 INFO L87 Difference]: Start difference. First operand 9103 states and 12168 transitions. Second operand 3 states. [2020-12-22 13:23:37,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:37,311 INFO L93 Difference]: Finished difference Result 22325 states and 29891 transitions. [2020-12-22 13:23:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:37,312 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 110 [2020-12-22 13:23:37,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:37,389 INFO L225 Difference]: With dead ends: 22325 [2020-12-22 13:23:37,389 INFO L226 Difference]: Without dead ends: 17762 [2020-12-22 13:23:37,404 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 13:23:37,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17762 states. [2020-12-22 13:23:38,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17762 to 9143. [2020-12-22 13:23:38,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9143 states. [2020-12-22 13:23:38,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9143 states to 9143 states and 12208 transitions. [2020-12-22 13:23:38,039 INFO L78 Accepts]: Start accepts. Automaton has 9143 states and 12208 transitions. Word has length 110 [2020-12-22 13:23:38,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:38,049 INFO L481 AbstractCegarLoop]: Abstraction has 9143 states and 12208 transitions. [2020-12-22 13:23:38,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 9143 states and 12208 transitions. [2020-12-22 13:23:38,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 13:23:38,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:38,068 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 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 13:23:38,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:23:38,068 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:38,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:38,069 INFO L82 PathProgramCache]: Analyzing trace with hash 227508482, now seen corresponding path program 1 times [2020-12-22 13:23:38,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:38,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734280773] [2020-12-22 13:23:38,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:38,321 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:23:38,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734280773] [2020-12-22 13:23:38,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:38,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:23:38,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792019425] [2020-12-22 13:23:38,322 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:23:38,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:38,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:23:38,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:23:38,323 INFO L87 Difference]: Start difference. First operand 9143 states and 12208 transitions. Second operand 4 states. [2020-12-22 13:23:39,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:39,951 INFO L93 Difference]: Finished difference Result 42869 states and 57332 transitions. [2020-12-22 13:23:39,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:23:39,952 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 111 [2020-12-22 13:23:39,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:40,048 INFO L225 Difference]: With dead ends: 42869 [2020-12-22 13:23:40,048 INFO L226 Difference]: Without dead ends: 33790 [2020-12-22 13:23:40,071 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 13:23:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33790 states. [2020-12-22 13:23:40,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33790 to 9223. [2020-12-22 13:23:40,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9223 states. [2020-12-22 13:23:40,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9223 states to 9223 states and 12288 transitions. [2020-12-22 13:23:40,762 INFO L78 Accepts]: Start accepts. Automaton has 9223 states and 12288 transitions. Word has length 111 [2020-12-22 13:23:40,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:40,763 INFO L481 AbstractCegarLoop]: Abstraction has 9223 states and 12288 transitions. [2020-12-22 13:23:40,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:23:40,763 INFO L276 IsEmpty]: Start isEmpty. Operand 9223 states and 12288 transitions. [2020-12-22 13:23:40,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-12-22 13:23:40,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:40,779 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 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 13:23:40,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:23:40,780 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:40,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:40,780 INFO L82 PathProgramCache]: Analyzing trace with hash 796501591, now seen corresponding path program 1 times [2020-12-22 13:23:40,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:40,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278376793] [2020-12-22 13:23:40,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:41,076 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:23:41,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278376793] [2020-12-22 13:23:41,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:41,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:23:41,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80291080] [2020-12-22 13:23:41,078 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:23:41,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:41,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:23:41,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:23:41,079 INFO L87 Difference]: Start difference. First operand 9223 states and 12288 transitions. Second operand 4 states. [2020-12-22 13:23:44,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:44,246 INFO L93 Difference]: Finished difference Result 22598 states and 30118 transitions. [2020-12-22 13:23:44,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:23:44,247 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 112 [2020-12-22 13:23:44,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:44,281 INFO L225 Difference]: With dead ends: 22598 [2020-12-22 13:23:44,281 INFO L226 Difference]: Without dead ends: 13439 [2020-12-22 13:23:44,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:23:44,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13439 states. [2020-12-22 13:23:44,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13439 to 9163. [2020-12-22 13:23:44,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9163 states. [2020-12-22 13:23:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9163 states to 9163 states and 12168 transitions. [2020-12-22 13:23:44,802 INFO L78 Accepts]: Start accepts. Automaton has 9163 states and 12168 transitions. Word has length 112 [2020-12-22 13:23:44,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:44,803 INFO L481 AbstractCegarLoop]: Abstraction has 9163 states and 12168 transitions. [2020-12-22 13:23:44,803 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:23:44,803 INFO L276 IsEmpty]: Start isEmpty. Operand 9163 states and 12168 transitions. [2020-12-22 13:23:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-12-22 13:23:44,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:44,818 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:23:44,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:23:44,818 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:44,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:44,819 INFO L82 PathProgramCache]: Analyzing trace with hash 676703786, now seen corresponding path program 1 times [2020-12-22 13:23:44,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:44,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416740359] [2020-12-22 13:23:44,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:44,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:45,129 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:23:45,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416740359] [2020-12-22 13:23:45,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:45,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:45,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142415867] [2020-12-22 13:23:45,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:45,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:45,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:45,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:45,137 INFO L87 Difference]: Start difference. First operand 9163 states and 12168 transitions. Second operand 3 states. [2020-12-22 13:23:45,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:45,640 INFO L93 Difference]: Finished difference Result 18310 states and 24331 transitions. [2020-12-22 13:23:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:45,641 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 114 [2020-12-22 13:23:45,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:45,663 INFO L225 Difference]: With dead ends: 18310 [2020-12-22 13:23:45,663 INFO L226 Difference]: Without dead ends: 9211 [2020-12-22 13:23:45,677 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 13:23:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9211 states. [2020-12-22 13:23:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9211 to 9187. [2020-12-22 13:23:46,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9187 states. [2020-12-22 13:23:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9187 states to 9187 states and 12192 transitions. [2020-12-22 13:23:46,159 INFO L78 Accepts]: Start accepts. Automaton has 9187 states and 12192 transitions. Word has length 114 [2020-12-22 13:23:46,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:46,159 INFO L481 AbstractCegarLoop]: Abstraction has 9187 states and 12192 transitions. [2020-12-22 13:23:46,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:46,160 INFO L276 IsEmpty]: Start isEmpty. Operand 9187 states and 12192 transitions. [2020-12-22 13:23:46,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 13:23:46,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:46,177 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:23:46,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:23:46,177 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:46,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:46,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2142614062, now seen corresponding path program 1 times [2020-12-22 13:23:46,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:46,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584492350] [2020-12-22 13:23:46,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:46,383 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 13:23:46,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584492350] [2020-12-22 13:23:46,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438529671] [2020-12-22 13:23:46,384 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 13:23:48,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:48,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 1697 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:23:48,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:23:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 13:23:48,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:23:48,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-12-22 13:23:48,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537915109] [2020-12-22 13:23:48,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:23:48,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:48,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:23:48,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:23:48,483 INFO L87 Difference]: Start difference. First operand 9187 states and 12192 transitions. Second operand 6 states. [2020-12-22 13:23:49,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:49,325 INFO L93 Difference]: Finished difference Result 18468 states and 24572 transitions. [2020-12-22 13:23:49,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:23:49,326 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2020-12-22 13:23:49,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:49,347 INFO L225 Difference]: With dead ends: 18468 [2020-12-22 13:23:49,347 INFO L226 Difference]: Without dead ends: 9341 [2020-12-22 13:23:49,363 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:23:49,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9341 states. [2020-12-22 13:23:50,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9341 to 9317. [2020-12-22 13:23:50,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9317 states. [2020-12-22 13:23:50,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9317 states to 9317 states and 12322 transitions. [2020-12-22 13:23:50,064 INFO L78 Accepts]: Start accepts. Automaton has 9317 states and 12322 transitions. Word has length 116 [2020-12-22 13:23:50,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:50,064 INFO L481 AbstractCegarLoop]: Abstraction has 9317 states and 12322 transitions. [2020-12-22 13:23:50,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:23:50,064 INFO L276 IsEmpty]: Start isEmpty. Operand 9317 states and 12322 transitions. [2020-12-22 13:23:50,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 13:23:50,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:50,080 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2020-12-22 13:23:50,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 13:23:50,294 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:50,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:50,294 INFO L82 PathProgramCache]: Analyzing trace with hash 938124799, now seen corresponding path program 1 times [2020-12-22 13:23:50,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:50,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139198977] [2020-12-22 13:23:50,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:50,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:50,474 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:23:50,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139198977] [2020-12-22 13:23:50,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:23:50,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:23:50,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138228406] [2020-12-22 13:23:50,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:23:50,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:23:50,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:23:50,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:50,478 INFO L87 Difference]: Start difference. First operand 9317 states and 12322 transitions. Second operand 3 states. [2020-12-22 13:23:53,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:23:53,153 INFO L93 Difference]: Finished difference Result 21552 states and 28612 transitions. [2020-12-22 13:23:53,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:23:53,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 120 [2020-12-22 13:23:53,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:23:53,185 INFO L225 Difference]: With dead ends: 21552 [2020-12-22 13:23:53,186 INFO L226 Difference]: Without dead ends: 12301 [2020-12-22 13:23:53,203 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:23:53,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12301 states. [2020-12-22 13:23:53,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12301 to 12287. [2020-12-22 13:23:53,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12287 states. [2020-12-22 13:23:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12287 states to 12287 states and 16300 transitions. [2020-12-22 13:23:53,925 INFO L78 Accepts]: Start accepts. Automaton has 12287 states and 16300 transitions. Word has length 120 [2020-12-22 13:23:53,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:23:53,925 INFO L481 AbstractCegarLoop]: Abstraction has 12287 states and 16300 transitions. [2020-12-22 13:23:53,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:23:53,926 INFO L276 IsEmpty]: Start isEmpty. Operand 12287 states and 16300 transitions. [2020-12-22 13:23:53,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-12-22 13:23:53,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:23:53,946 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:23:53,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 13:23:53,947 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:23:53,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:23:53,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1636329878, now seen corresponding path program 2 times [2020-12-22 13:23:53,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:23:53,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285296927] [2020-12-22 13:23:53,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:23:54,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:23:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:23:54,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285296927] [2020-12-22 13:23:54,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486366599] [2020-12-22 13:23:54,255 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 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 13:24:06,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:24:06,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:24:06,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 1715 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:24:06,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:24:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:24:06,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:24:06,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-12-22 13:24:06,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745065371] [2020-12-22 13:24:06,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:24:06,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:06,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:24:06,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:24:06,871 INFO L87 Difference]: Start difference. First operand 12287 states and 16300 transitions. Second operand 8 states. [2020-12-22 13:24:07,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:07,829 INFO L93 Difference]: Finished difference Result 24571 states and 32643 transitions. [2020-12-22 13:24:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:24:07,830 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 120 [2020-12-22 13:24:07,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:07,868 INFO L225 Difference]: With dead ends: 24571 [2020-12-22 13:24:07,868 INFO L226 Difference]: Without dead ends: 12345 [2020-12-22 13:24:07,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:24:07,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12345 states. [2020-12-22 13:24:08,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12345 to 12345. [2020-12-22 13:24:08,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12345 states. [2020-12-22 13:24:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12345 states to 12345 states and 16358 transitions. [2020-12-22 13:24:08,744 INFO L78 Accepts]: Start accepts. Automaton has 12345 states and 16358 transitions. Word has length 120 [2020-12-22 13:24:08,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:08,745 INFO L481 AbstractCegarLoop]: Abstraction has 12345 states and 16358 transitions. [2020-12-22 13:24:08,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:24:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand 12345 states and 16358 transitions. [2020-12-22 13:24:08,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-12-22 13:24:08,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:08,767 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-12-22 13:24:08,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 13:24:08,968 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:08,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:08,969 INFO L82 PathProgramCache]: Analyzing trace with hash 441157874, now seen corresponding path program 3 times [2020-12-22 13:24:08,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:08,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124051988] [2020-12-22 13:24:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:09,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:09,228 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-12-22 13:24:09,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124051988] [2020-12-22 13:24:09,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837072211] [2020-12-22 13:24:09,229 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 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 13:24:21,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:24:21,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:24:21,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:24:21,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:24:21,557 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-22 13:24:21,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:24:21,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-12-22 13:24:21,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289825349] [2020-12-22 13:24:21,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:24:21,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:21,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:24:21,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:24:21,559 INFO L87 Difference]: Start difference. First operand 12345 states and 16358 transitions. Second operand 5 states. [2020-12-22 13:24:25,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:25,597 INFO L93 Difference]: Finished difference Result 37147 states and 49410 transitions. [2020-12-22 13:24:25,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:24:25,601 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 122 [2020-12-22 13:24:25,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:25,659 INFO L225 Difference]: With dead ends: 37147 [2020-12-22 13:24:25,659 INFO L226 Difference]: Without dead ends: 30914 [2020-12-22 13:24:25,677 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:24:25,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30914 states. [2020-12-22 13:24:27,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30914 to 24719. [2020-12-22 13:24:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24719 states. [2020-12-22 13:24:27,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24719 states to 24719 states and 32820 transitions. [2020-12-22 13:24:27,177 INFO L78 Accepts]: Start accepts. Automaton has 24719 states and 32820 transitions. Word has length 122 [2020-12-22 13:24:27,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:27,177 INFO L481 AbstractCegarLoop]: Abstraction has 24719 states and 32820 transitions. [2020-12-22 13:24:27,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:24:27,177 INFO L276 IsEmpty]: Start isEmpty. Operand 24719 states and 32820 transitions. [2020-12-22 13:24:27,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-12-22 13:24:27,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:27,190 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:24:27,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 13:24:27,407 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:27,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:27,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1346057549, now seen corresponding path program 1 times [2020-12-22 13:24:27,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:27,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609880872] [2020-12-22 13:24:27,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:27,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:27,576 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2020-12-22 13:24:27,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609880872] [2020-12-22 13:24:27,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:24:27,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:24:27,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556990384] [2020-12-22 13:24:27,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:24:27,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:27,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:24:27,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:24:27,578 INFO L87 Difference]: Start difference. First operand 24719 states and 32820 transitions. Second operand 4 states. [2020-12-22 13:24:30,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:30,077 INFO L93 Difference]: Finished difference Result 85102 states and 113293 transitions. [2020-12-22 13:24:30,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:24:30,078 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 124 [2020-12-22 13:24:30,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:30,180 INFO L225 Difference]: With dead ends: 85102 [2020-12-22 13:24:30,180 INFO L226 Difference]: Without dead ends: 66495 [2020-12-22 13:24:30,211 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:24:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66495 states. [2020-12-22 13:24:31,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66495 to 25031. [2020-12-22 13:24:31,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25031 states. [2020-12-22 13:24:31,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25031 states to 25031 states and 33262 transitions. [2020-12-22 13:24:31,897 INFO L78 Accepts]: Start accepts. Automaton has 25031 states and 33262 transitions. Word has length 124 [2020-12-22 13:24:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:31,898 INFO L481 AbstractCegarLoop]: Abstraction has 25031 states and 33262 transitions. [2020-12-22 13:24:31,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:24:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 25031 states and 33262 transitions. [2020-12-22 13:24:31,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 13:24:31,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:31,911 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1] [2020-12-22 13:24:31,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 13:24:31,911 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:31,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:31,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1586108454, now seen corresponding path program 1 times [2020-12-22 13:24:31,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:31,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859822754] [2020-12-22 13:24:31,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:32,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-22 13:24:32,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859822754] [2020-12-22 13:24:32,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482967237] [2020-12-22 13:24:32,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 13:24:33,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:33,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 1736 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-22 13:24:33,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:24:33,847 WARN L197 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2020-12-22 13:24:34,032 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2020-12-22 13:24:34,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:24:34,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2020-12-22 13:24:34,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002490617] [2020-12-22 13:24:34,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:24:34,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:34,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:24:34,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:24:34,039 INFO L87 Difference]: Start difference. First operand 25031 states and 33262 transitions. Second operand 10 states. [2020-12-22 13:24:35,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:35,346 INFO L93 Difference]: Finished difference Result 50114 states and 66678 transitions. [2020-12-22 13:24:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 13:24:35,347 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 126 [2020-12-22 13:24:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:35,382 INFO L225 Difference]: With dead ends: 50114 [2020-12-22 13:24:35,383 INFO L226 Difference]: Without dead ends: 25145 [2020-12-22 13:24:35,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:24:35,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25145 states. [2020-12-22 13:24:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25145 to 25145. [2020-12-22 13:24:36,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25145 states. [2020-12-22 13:24:36,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25145 states to 25145 states and 33376 transitions. [2020-12-22 13:24:36,693 INFO L78 Accepts]: Start accepts. Automaton has 25145 states and 33376 transitions. Word has length 126 [2020-12-22 13:24:36,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:36,693 INFO L481 AbstractCegarLoop]: Abstraction has 25145 states and 33376 transitions. [2020-12-22 13:24:36,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:24:36,694 INFO L276 IsEmpty]: Start isEmpty. Operand 25145 states and 33376 transitions. [2020-12-22 13:24:36,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-12-22 13:24:36,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:36,707 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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, 1, 1] [2020-12-22 13:24:36,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:24:36,922 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:36,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:36,923 INFO L82 PathProgramCache]: Analyzing trace with hash 524798270, now seen corresponding path program 2 times [2020-12-22 13:24:36,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:36,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849794886] [2020-12-22 13:24:36,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:37,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:37,191 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 13:24:37,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849794886] [2020-12-22 13:24:37,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057862490] [2020-12-22 13:24:37,192 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 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 13:24:49,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 13:24:49,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:24:49,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 1748 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:24:49,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:24:49,796 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 13:24:49,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:24:49,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 13:24:49,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346359959] [2020-12-22 13:24:49,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:24:49,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:24:49,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:24:49,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:24:49,798 INFO L87 Difference]: Start difference. First operand 25145 states and 33376 transitions. Second operand 6 states. [2020-12-22 13:24:51,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:24:51,017 INFO L93 Difference]: Finished difference Result 50436 states and 66957 transitions. [2020-12-22 13:24:51,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:24:51,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 128 [2020-12-22 13:24:51,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:24:51,048 INFO L225 Difference]: With dead ends: 50436 [2020-12-22 13:24:51,048 INFO L226 Difference]: Without dead ends: 25361 [2020-12-22 13:24:51,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 128 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 13:24:51,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25361 states. [2020-12-22 13:24:52,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25361 to 25289. [2020-12-22 13:24:52,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25289 states. [2020-12-22 13:24:52,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25289 states to 25289 states and 33520 transitions. [2020-12-22 13:24:52,427 INFO L78 Accepts]: Start accepts. Automaton has 25289 states and 33520 transitions. Word has length 128 [2020-12-22 13:24:52,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:24:52,428 INFO L481 AbstractCegarLoop]: Abstraction has 25289 states and 33520 transitions. [2020-12-22 13:24:52,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:24:52,428 INFO L276 IsEmpty]: Start isEmpty. Operand 25289 states and 33520 transitions. [2020-12-22 13:24:52,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-12-22 13:24:52,436 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:24:52,436 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:24:52,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 13:24:52,651 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:24:52,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:24:52,652 INFO L82 PathProgramCache]: Analyzing trace with hash -2104666046, now seen corresponding path program 3 times [2020-12-22 13:24:52,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:24:52,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595611905] [2020-12-22 13:24:52,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:24:52,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:24:52,906 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 13:24:52,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595611905] [2020-12-22 13:24:52,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803346876] [2020-12-22 13:24:52,907 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 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 13:25:08,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 13:25:08,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 13:25:08,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 1565 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 13:25:08,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:25:08,510 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-12-22 13:25:08,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:25:08,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2020-12-22 13:25:08,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727454315] [2020-12-22 13:25:08,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:25:08,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:25:08,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:25:08,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:25:08,513 INFO L87 Difference]: Start difference. First operand 25289 states and 33520 transitions. Second operand 5 states. [2020-12-22 13:25:13,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:25:13,530 INFO L93 Difference]: Finished difference Result 105969 states and 142172 transitions. [2020-12-22 13:25:13,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:25:13,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 130 [2020-12-22 13:25:13,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:25:13,631 INFO L225 Difference]: With dead ends: 105969 [2020-12-22 13:25:13,632 INFO L226 Difference]: Without dead ends: 80750 [2020-12-22 13:25:13,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-12-22 13:25:13,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80750 states. [2020-12-22 13:25:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80750 to 25705. [2020-12-22 13:25:15,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25705 states. [2020-12-22 13:25:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25705 states to 25705 states and 33936 transitions. [2020-12-22 13:25:15,506 INFO L78 Accepts]: Start accepts. Automaton has 25705 states and 33936 transitions. Word has length 130 [2020-12-22 13:25:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:25:15,507 INFO L481 AbstractCegarLoop]: Abstraction has 25705 states and 33936 transitions. [2020-12-22 13:25:15,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:25:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 25705 states and 33936 transitions. [2020-12-22 13:25:15,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 13:25:15,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:25:15,515 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:25:15,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 13:25:15,717 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:25:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:25:15,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1471801849, now seen corresponding path program 1 times [2020-12-22 13:25:15,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:25:15,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467064345] [2020-12-22 13:25:15,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:25:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:25:16,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 13:25:16,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467064345] [2020-12-22 13:25:16,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436435912] [2020-12-22 13:25:16,166 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 13:25:17,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:25:17,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1774 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 13:25:17,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:25:18,023 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-12-22 13:25:18,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 13:25:18,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 13:25:18,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034245748] [2020-12-22 13:25:18,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 13:25:18,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:25:18,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 13:25:18,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:25:18,025 INFO L87 Difference]: Start difference. First operand 25705 states and 33936 transitions. Second operand 7 states. [2020-12-22 13:25:19,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:25:19,641 INFO L93 Difference]: Finished difference Result 51484 states and 68005 transitions. [2020-12-22 13:25:19,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:25:19,642 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 131 [2020-12-22 13:25:19,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:25:19,670 INFO L225 Difference]: With dead ends: 51484 [2020-12-22 13:25:19,670 INFO L226 Difference]: Without dead ends: 25849 [2020-12-22 13:25:19,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 131 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 13:25:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25849 states. [2020-12-22 13:25:21,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25849 to 25849. [2020-12-22 13:25:21,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25849 states. [2020-12-22 13:25:21,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25849 states to 25849 states and 34080 transitions. [2020-12-22 13:25:21,107 INFO L78 Accepts]: Start accepts. Automaton has 25849 states and 34080 transitions. Word has length 131 [2020-12-22 13:25:21,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:25:21,108 INFO L481 AbstractCegarLoop]: Abstraction has 25849 states and 34080 transitions. [2020-12-22 13:25:21,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 13:25:21,108 INFO L276 IsEmpty]: Start isEmpty. Operand 25849 states and 34080 transitions. [2020-12-22 13:25:21,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 13:25:21,118 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:25:21,119 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:25:21,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 13:25:21,323 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:25:21,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:25:21,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1727673917, now seen corresponding path program 2 times [2020-12-22 13:25:21,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:25:21,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590764605] [2020-12-22 13:25:21,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:25:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:25:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-22 13:25:22,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590764605] [2020-12-22 13:25:22,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:25:22,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:25:22,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32823079] [2020-12-22 13:25:22,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:25:22,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:25:22,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:25:22,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:25:22,031 INFO L87 Difference]: Start difference. First operand 25849 states and 34080 transitions. Second operand 4 states. [2020-12-22 13:25:25,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:25:25,073 INFO L93 Difference]: Finished difference Result 38859 states and 51267 transitions. [2020-12-22 13:25:25,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:25:25,074 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 133 [2020-12-22 13:25:25,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:25:25,093 INFO L225 Difference]: With dead ends: 38859 [2020-12-22 13:25:25,093 INFO L226 Difference]: Without dead ends: 13072 [2020-12-22 13:25:25,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:25:25,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13072 states. [2020-12-22 13:25:25,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13072 to 12997. [2020-12-22 13:25:25,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12997 states. [2020-12-22 13:25:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12997 states to 12997 states and 17155 transitions. [2020-12-22 13:25:25,854 INFO L78 Accepts]: Start accepts. Automaton has 12997 states and 17155 transitions. Word has length 133 [2020-12-22 13:25:25,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:25:25,855 INFO L481 AbstractCegarLoop]: Abstraction has 12997 states and 17155 transitions. [2020-12-22 13:25:25,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:25:25,855 INFO L276 IsEmpty]: Start isEmpty. Operand 12997 states and 17155 transitions. [2020-12-22 13:25:25,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-12-22 13:25:25,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:25:25,860 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:25:25,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 13:25:25,860 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:25:25,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:25:25,861 INFO L82 PathProgramCache]: Analyzing trace with hash -151457029, now seen corresponding path program 1 times [2020-12-22 13:25:25,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:25:25,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213981411] [2020-12-22 13:25:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:25:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:25:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-12-22 13:25:26,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213981411] [2020-12-22 13:25:26,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:25:26,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-12-22 13:25:26,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62521831] [2020-12-22 13:25:26,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 13:25:26,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:25:26,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 13:25:26,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:25:26,928 INFO L87 Difference]: Start difference. First operand 12997 states and 17155 transitions. Second operand 10 states. [2020-12-22 13:25:34,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:25:34,584 INFO L93 Difference]: Finished difference Result 59069 states and 78244 transitions. [2020-12-22 13:25:34,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 13:25:34,585 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 133 [2020-12-22 13:25:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:25:34,740 INFO L225 Difference]: With dead ends: 59069 [2020-12-22 13:25:34,740 INFO L226 Difference]: Without dead ends: 46157 [2020-12-22 13:25:34,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2020-12-22 13:25:34,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46157 states. [2020-12-22 13:25:36,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46157 to 13153. [2020-12-22 13:25:36,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13153 states. [2020-12-22 13:25:36,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13153 states to 13153 states and 17259 transitions. [2020-12-22 13:25:36,356 INFO L78 Accepts]: Start accepts. Automaton has 13153 states and 17259 transitions. Word has length 133 [2020-12-22 13:25:36,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:25:36,356 INFO L481 AbstractCegarLoop]: Abstraction has 13153 states and 17259 transitions. [2020-12-22 13:25:36,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 13:25:36,356 INFO L276 IsEmpty]: Start isEmpty. Operand 13153 states and 17259 transitions. [2020-12-22 13:25:36,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-12-22 13:25:36,361 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:25:36,362 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:25:36,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 13:25:36,362 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:25:36,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:25:36,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1841371975, now seen corresponding path program 1 times [2020-12-22 13:25:36,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:25:36,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100915021] [2020-12-22 13:25:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:25:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:25:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-12-22 13:25:36,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100915021] [2020-12-22 13:25:36,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:25:36,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:25:36,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695963083] [2020-12-22 13:25:36,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:25:36,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:25:36,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:25:36,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:25:36,649 INFO L87 Difference]: Start difference. First operand 13153 states and 17259 transitions. Second operand 5 states. [2020-12-22 13:25:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:25:48,194 INFO L93 Difference]: Finished difference Result 96248 states and 128494 transitions. [2020-12-22 13:25:48,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 13:25:48,195 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 135 [2020-12-22 13:25:48,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:25:48,296 INFO L225 Difference]: With dead ends: 96248 [2020-12-22 13:25:48,296 INFO L226 Difference]: Without dead ends: 83180 [2020-12-22 13:25:48,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:25:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83180 states. [2020-12-22 13:25:50,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83180 to 13309. [2020-12-22 13:25:50,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13309 states. [2020-12-22 13:25:50,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13309 states to 13309 states and 17415 transitions. [2020-12-22 13:25:50,484 INFO L78 Accepts]: Start accepts. Automaton has 13309 states and 17415 transitions. Word has length 135 [2020-12-22 13:25:50,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:25:50,484 INFO L481 AbstractCegarLoop]: Abstraction has 13309 states and 17415 transitions. [2020-12-22 13:25:50,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:25:50,485 INFO L276 IsEmpty]: Start isEmpty. Operand 13309 states and 17415 transitions. [2020-12-22 13:25:50,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-12-22 13:25:50,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:25:50,489 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:25:50,489 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 13:25:50,489 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:25:50,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:25:50,489 INFO L82 PathProgramCache]: Analyzing trace with hash 618714123, now seen corresponding path program 1 times [2020-12-22 13:25:50,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:25:50,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669536161] [2020-12-22 13:25:50,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:25:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:25:52,353 WARN L197 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 13:25:52,602 WARN L197 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 57 [2020-12-22 13:25:52,800 WARN L197 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 42 [2020-12-22 13:25:53,011 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 38 [2020-12-22 13:25:53,191 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-12-22 13:25:53,395 WARN L197 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 24 [2020-12-22 13:25:53,475 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-12-22 13:25:53,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669536161] [2020-12-22 13:25:53,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:25:53,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2020-12-22 13:25:53,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712630094] [2020-12-22 13:25:53,476 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 13:25:53,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:25:53,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 13:25:53,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-12-22 13:25:53,477 INFO L87 Difference]: Start difference. First operand 13309 states and 17415 transitions. Second operand 14 states. [2020-12-22 13:26:26,594 WARN L197 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 84 [2020-12-22 13:26:28,356 WARN L197 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2020-12-22 13:26:31,081 WARN L197 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 118 [2020-12-22 13:26:36,145 WARN L197 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 151 DAG size of output: 142 [2020-12-22 13:26:45,264 WARN L197 SmtUtils]: Spent 1.35 s on a formula simplification. DAG size of input: 163 DAG size of output: 154