/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--ethernet--micrel--ks8842.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 13:18:55,541 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 13:18:55,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 13:18:55,583 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 13:18:55,584 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 13:18:55,586 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 13:18:55,588 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 13:18:55,590 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 13:18:55,592 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 13:18:55,594 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 13:18:55,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 13:18:55,596 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 13:18:55,597 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 13:18:55,598 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 13:18:55,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 13:18:55,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 13:18:55,602 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 13:18:55,603 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 13:18:55,605 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 13:18:55,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 13:18:55,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 13:18:55,611 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 13:18:55,612 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 13:18:55,613 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 13:18:55,632 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 13:18:55,633 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 13:18:55,633 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 13:18:55,634 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 13:18:55,635 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 13:18:55,636 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 13:18:55,636 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 13:18:55,637 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 13:18:55,638 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 13:18:55,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 13:18:55,640 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 13:18:55,641 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 13:18:55,642 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 13:18:55,642 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 13:18:55,643 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 13:18:55,644 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 13:18:55,645 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 13:18:55,646 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 13:18:55,678 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 13:18:55,679 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 13:18:55,680 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 13:18:55,681 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 13:18:55,681 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 13:18:55,681 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 13:18:55,681 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 13:18:55,682 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 13:18:55,682 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 13:18:55,682 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 13:18:55,682 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 13:18:55,683 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 13:18:55,683 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 13:18:55,683 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 13:18:55,683 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 13:18:55,684 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 13:18:55,684 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 13:18:55,684 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 13:18:55,684 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 13:18:55,685 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 13:18:55,685 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 13:18:55,685 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 13:18:55,685 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 13:18:55,686 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 13:18:55,686 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 13:18:55,686 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 13:18:56,071 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 13:18:56,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 13:18:56,125 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 13:18:56,127 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 13:18:56,127 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 13:18:56,128 INFO L432 ainManager$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--ethernet--micrel--ks8842.ko-entry_point.cil.out.i [2020-12-22 13:18:56,219 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ccfaa7c/b18a18e8f01248888afaf2ba204c6d73/FLAGaf8ad41fd [2020-12-22 13:18:57,254 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 13:18:57,255 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--ethernet--micrel--ks8842.ko-entry_point.cil.out.i [2020-12-22 13:18:57,306 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ccfaa7c/b18a18e8f01248888afaf2ba204c6d73/FLAGaf8ad41fd [2020-12-22 13:18:57,694 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/85ccfaa7c/b18a18e8f01248888afaf2ba204c6d73 [2020-12-22 13:18:57,696 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 13:18:57,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 13:18:57,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 13:18:57,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 13:18:57,705 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 13:18:57,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:18:57" (1/1) ... [2020-12-22 13:18:57,707 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72af4fb7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:18:57, skipping insertion in model container [2020-12-22 13:18:57,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 01:18:57" (1/1) ... [2020-12-22 13:18:57,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 13:18:57,843 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 13:18:59,119 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--ethernet--micrel--ks8842.ko-entry_point.cil.out.i[168234,168247] [2020-12-22 13:19:00,029 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:19:00,077 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 13:19:00,279 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--ethernet--micrel--ks8842.ko-entry_point.cil.out.i[168234,168247] [2020-12-22 13:19:00,511 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 13:19:00,896 INFO L208 MainTranslator]: Completed translation [2020-12-22 13:19:00,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:19:00 WrapperNode [2020-12-22 13:19:00,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 13:19:00,899 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 13:19:00,899 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 13:19:00,899 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 13:19:00,909 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:19:00" (1/1) ... [2020-12-22 13:19:01,006 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:19:00" (1/1) ... [2020-12-22 13:19:01,323 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 13:19:01,326 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 13:19:01,327 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 13:19:01,327 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 13:19:01,338 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:19:00" (1/1) ... [2020-12-22 13:19:01,338 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:19:00" (1/1) ... [2020-12-22 13:19:01,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:19:00" (1/1) ... [2020-12-22 13:19:01,391 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:19:00" (1/1) ... [2020-12-22 13:19:01,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:19:00" (1/1) ... [2020-12-22 13:19:01,641 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:19:00" (1/1) ... [2020-12-22 13:19:01,683 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:19:00" (1/1) ... [2020-12-22 13:19:01,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 13:19:01,738 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 13:19:01,738 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 13:19:01,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 13:19:01,739 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:19:00" (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 13:19:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~$Pointer$ [2020-12-22 13:19:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~$Pointer$ [2020-12-22 13:19:01,865 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 13:19:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-22 13:19:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 13:19:01,866 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-12-22 13:19:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~unchecked~int [2020-12-22 13:19:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int [2020-12-22 13:19:01,867 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-22 13:19:01,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 13:19:01,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-22 13:19:01,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-22 13:19:01,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 13:19:01,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 13:19:01,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 13:19:14,361 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 13:19:14,361 INFO L299 CfgBuilder]: Removed 1616 assume(true) statements. [2020-12-22 13:19:14,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:19:14 BoogieIcfgContainer [2020-12-22 13:19:14,367 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 13:19:14,369 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 13:19:14,369 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 13:19:14,373 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 13:19:14,373 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 01:18:57" (1/3) ... [2020-12-22 13:19:14,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ab9c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:19:14, skipping insertion in model container [2020-12-22 13:19:14,374 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 01:19:00" (2/3) ... [2020-12-22 13:19:14,374 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30ab9c82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 01:19:14, skipping insertion in model container [2020-12-22 13:19:14,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 01:19:14" (3/3) ... [2020-12-22 13:19:14,376 INFO L111 eAbstractionObserver]: Analyzing ICFG 205_9a_array_unsafes_linux-3.16-rc1.tar.xz-205_9a-drivers--net--ethernet--micrel--ks8842.ko-entry_point.cil.out.i [2020-12-22 13:19:14,383 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 13:19:14,390 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 13:19:14,413 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 13:19:14,492 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 13:19:14,492 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 13:19:14,493 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 13:19:14,493 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 13:19:14,493 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 13:19:14,493 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 13:19:14,493 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 13:19:14,493 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 13:19:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand 1249 states. [2020-12-22 13:19:14,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 13:19:14,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:14,565 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] [2020-12-22 13:19:14,566 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:14,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:14,572 INFO L82 PathProgramCache]: Analyzing trace with hash -953286410, now seen corresponding path program 1 times [2020-12-22 13:19:14,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:14,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533586951] [2020-12-22 13:19:14,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:15,441 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 13:19:15,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533586951] [2020-12-22 13:19:15,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:15,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 13:19:15,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889748205] [2020-12-22 13:19:15,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:19:15,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:15,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:19:15,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:19:15,471 INFO L87 Difference]: Start difference. First operand 1249 states. Second operand 6 states. [2020-12-22 13:19:20,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:20,475 INFO L93 Difference]: Finished difference Result 4914 states and 6432 transitions. [2020-12-22 13:19:20,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 13:19:20,478 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-12-22 13:19:20,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:20,528 INFO L225 Difference]: With dead ends: 4914 [2020-12-22 13:19:20,528 INFO L226 Difference]: Without dead ends: 3600 [2020-12-22 13:19:20,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 13:19:20,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3600 states. [2020-12-22 13:19:20,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3600 to 3597. [2020-12-22 13:19:20,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3597 states. [2020-12-22 13:19:20,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3597 states to 3597 states and 4534 transitions. [2020-12-22 13:19:20,902 INFO L78 Accepts]: Start accepts. Automaton has 3597 states and 4534 transitions. Word has length 22 [2020-12-22 13:19:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:20,903 INFO L481 AbstractCegarLoop]: Abstraction has 3597 states and 4534 transitions. [2020-12-22 13:19:20,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:19:20,903 INFO L276 IsEmpty]: Start isEmpty. Operand 3597 states and 4534 transitions. [2020-12-22 13:19:20,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 13:19:20,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:20,914 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] [2020-12-22 13:19:20,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 13:19:20,915 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:20,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:20,918 INFO L82 PathProgramCache]: Analyzing trace with hash 951586567, now seen corresponding path program 1 times [2020-12-22 13:19:20,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:20,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886241924] [2020-12-22 13:19:20,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:21,263 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 13:19:21,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886241924] [2020-12-22 13:19:21,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:21,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:19:21,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823439541] [2020-12-22 13:19:21,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:19:21,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:21,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:19:21,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:19:21,270 INFO L87 Difference]: Start difference. First operand 3597 states and 4534 transitions. Second operand 5 states. [2020-12-22 13:19:22,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:22,066 INFO L93 Difference]: Finished difference Result 10753 states and 13559 transitions. [2020-12-22 13:19:22,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:19:22,067 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-12-22 13:19:22,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:22,103 INFO L225 Difference]: With dead ends: 10753 [2020-12-22 13:19:22,104 INFO L226 Difference]: Without dead ends: 7169 [2020-12-22 13:19:22,112 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 13:19:22,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7169 states. [2020-12-22 13:19:22,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7169 to 7085. [2020-12-22 13:19:22,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7085 states. [2020-12-22 13:19:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7085 states to 7085 states and 8931 transitions. [2020-12-22 13:19:22,533 INFO L78 Accepts]: Start accepts. Automaton has 7085 states and 8931 transitions. Word has length 28 [2020-12-22 13:19:22,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:22,534 INFO L481 AbstractCegarLoop]: Abstraction has 7085 states and 8931 transitions. [2020-12-22 13:19:22,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:19:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 7085 states and 8931 transitions. [2020-12-22 13:19:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-12-22 13:19:22,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:22,544 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] [2020-12-22 13:19:22,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 13:19:22,544 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:22,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:22,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1953392450, now seen corresponding path program 1 times [2020-12-22 13:19:22,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:22,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852626588] [2020-12-22 13:19:22,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:22,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:22,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 13:19:22,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852626588] [2020-12-22 13:19:22,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:22,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:19:22,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954337665] [2020-12-22 13:19:22,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:19:22,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:22,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:19:22,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:22,789 INFO L87 Difference]: Start difference. First operand 7085 states and 8931 transitions. Second operand 3 states. [2020-12-22 13:19:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:23,344 INFO L93 Difference]: Finished difference Result 16083 states and 20283 transitions. [2020-12-22 13:19:23,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:19:23,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 72 [2020-12-22 13:19:23,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:23,398 INFO L225 Difference]: With dead ends: 16083 [2020-12-22 13:19:23,398 INFO L226 Difference]: Without dead ends: 9016 [2020-12-22 13:19:23,414 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 13:19:23,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9016 states. [2020-12-22 13:19:23,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9016 to 8265. [2020-12-22 13:19:23,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8265 states. [2020-12-22 13:19:23,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8265 states to 8265 states and 10473 transitions. [2020-12-22 13:19:23,869 INFO L78 Accepts]: Start accepts. Automaton has 8265 states and 10473 transitions. Word has length 72 [2020-12-22 13:19:23,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:23,869 INFO L481 AbstractCegarLoop]: Abstraction has 8265 states and 10473 transitions. [2020-12-22 13:19:23,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:19:23,870 INFO L276 IsEmpty]: Start isEmpty. Operand 8265 states and 10473 transitions. [2020-12-22 13:19:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 13:19:23,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:23,882 INFO L422 BasicCegarLoop]: trace histogram [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, 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 13:19:23,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 13:19:23,883 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:23,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:23,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1702461332, now seen corresponding path program 1 times [2020-12-22 13:19:23,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:23,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051750385] [2020-12-22 13:19:23,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:24,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 13:19:24,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051750385] [2020-12-22 13:19:24,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:24,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:19:24,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079799786] [2020-12-22 13:19:24,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:19:24,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:24,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:19:24,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:24,405 INFO L87 Difference]: Start difference. First operand 8265 states and 10473 transitions. Second operand 3 states. [2020-12-22 13:19:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:25,016 INFO L93 Difference]: Finished difference Result 23500 states and 29832 transitions. [2020-12-22 13:19:25,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:19:25,017 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 136 [2020-12-22 13:19:25,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:25,095 INFO L225 Difference]: With dead ends: 23500 [2020-12-22 13:19:25,095 INFO L226 Difference]: Without dead ends: 15253 [2020-12-22 13:19:25,112 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 13:19:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15253 states. [2020-12-22 13:19:25,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15253 to 15077. [2020-12-22 13:19:25,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15077 states. [2020-12-22 13:19:25,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15077 states to 15077 states and 19144 transitions. [2020-12-22 13:19:25,814 INFO L78 Accepts]: Start accepts. Automaton has 15077 states and 19144 transitions. Word has length 136 [2020-12-22 13:19:25,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:25,817 INFO L481 AbstractCegarLoop]: Abstraction has 15077 states and 19144 transitions. [2020-12-22 13:19:25,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:19:25,817 INFO L276 IsEmpty]: Start isEmpty. Operand 15077 states and 19144 transitions. [2020-12-22 13:19:25,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 13:19:25,843 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:25,844 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 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 13:19:25,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 13:19:25,844 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:25,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:25,845 INFO L82 PathProgramCache]: Analyzing trace with hash 70652339, now seen corresponding path program 1 times [2020-12-22 13:19:25,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:25,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686427661] [2020-12-22 13:19:25,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:26,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:19:26,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686427661] [2020-12-22 13:19:26,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:26,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:19:26,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327623468] [2020-12-22 13:19:26,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:19:26,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:26,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:19:26,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:19:26,285 INFO L87 Difference]: Start difference. First operand 15077 states and 19144 transitions. Second operand 4 states. [2020-12-22 13:19:27,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:27,866 INFO L93 Difference]: Finished difference Result 44787 states and 56862 transitions. [2020-12-22 13:19:27,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:19:27,868 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 146 [2020-12-22 13:19:27,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:27,953 INFO L225 Difference]: With dead ends: 44787 [2020-12-22 13:19:27,953 INFO L226 Difference]: Without dead ends: 29728 [2020-12-22 13:19:27,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 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 13:19:28,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29728 states. [2020-12-22 13:19:29,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29728 to 15125. [2020-12-22 13:19:29,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15125 states. [2020-12-22 13:19:29,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15125 states to 15125 states and 19204 transitions. [2020-12-22 13:19:29,263 INFO L78 Accepts]: Start accepts. Automaton has 15125 states and 19204 transitions. Word has length 146 [2020-12-22 13:19:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:29,267 INFO L481 AbstractCegarLoop]: Abstraction has 15125 states and 19204 transitions. [2020-12-22 13:19:29,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:19:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 15125 states and 19204 transitions. [2020-12-22 13:19:29,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 13:19:29,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:29,284 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1, 1, 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 13:19:29,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 13:19:29,285 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:29,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:29,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1947135157, now seen corresponding path program 1 times [2020-12-22 13:19:29,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:29,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204779316] [2020-12-22 13:19:29,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:29,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:29,617 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 13:19:29,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204779316] [2020-12-22 13:19:29,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:29,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:19:29,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607715621] [2020-12-22 13:19:29,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:19:29,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:29,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:19:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:29,620 INFO L87 Difference]: Start difference. First operand 15125 states and 19204 transitions. Second operand 3 states. [2020-12-22 13:19:32,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:32,866 INFO L93 Difference]: Finished difference Result 33469 states and 42708 transitions. [2020-12-22 13:19:32,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:19:32,871 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 146 [2020-12-22 13:19:32,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:32,918 INFO L225 Difference]: With dead ends: 33469 [2020-12-22 13:19:32,919 INFO L226 Difference]: Without dead ends: 18362 [2020-12-22 13:19:32,943 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 13:19:32,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18362 states. [2020-12-22 13:19:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18362 to 17563. [2020-12-22 13:19:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17563 states. [2020-12-22 13:19:33,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17563 states to 17563 states and 22391 transitions. [2020-12-22 13:19:33,828 INFO L78 Accepts]: Start accepts. Automaton has 17563 states and 22391 transitions. Word has length 146 [2020-12-22 13:19:33,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:33,829 INFO L481 AbstractCegarLoop]: Abstraction has 17563 states and 22391 transitions. [2020-12-22 13:19:33,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:19:33,829 INFO L276 IsEmpty]: Start isEmpty. Operand 17563 states and 22391 transitions. [2020-12-22 13:19:33,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2020-12-22 13:19:33,850 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:33,851 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:33,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 13:19:33,851 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:33,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:33,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1372986885, now seen corresponding path program 1 times [2020-12-22 13:19:33,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:33,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141619927] [2020-12-22 13:19:33,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:34,159 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-12-22 13:19:34,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141619927] [2020-12-22 13:19:34,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:34,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:19:34,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337088424] [2020-12-22 13:19:34,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:19:34,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:34,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:19:34,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:34,163 INFO L87 Difference]: Start difference. First operand 17563 states and 22391 transitions. Second operand 3 states. [2020-12-22 13:19:35,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:35,579 INFO L93 Difference]: Finished difference Result 38345 states and 49082 transitions. [2020-12-22 13:19:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:19:35,581 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 159 [2020-12-22 13:19:35,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:35,619 INFO L225 Difference]: With dead ends: 38345 [2020-12-22 13:19:35,619 INFO L226 Difference]: Without dead ends: 20800 [2020-12-22 13:19:35,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 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 13:19:35,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20800 states. [2020-12-22 13:19:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20800 to 20001. [2020-12-22 13:19:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20001 states. [2020-12-22 13:19:36,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 25698 transitions. [2020-12-22 13:19:36,756 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 25698 transitions. Word has length 159 [2020-12-22 13:19:36,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:36,757 INFO L481 AbstractCegarLoop]: Abstraction has 20001 states and 25698 transitions. [2020-12-22 13:19:36,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:19:36,757 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 25698 transitions. [2020-12-22 13:19:36,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-12-22 13:19:36,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:36,796 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:36,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 13:19:36,797 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:36,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:36,798 INFO L82 PathProgramCache]: Analyzing trace with hash -264605728, now seen corresponding path program 1 times [2020-12-22 13:19:36,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:36,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123299872] [2020-12-22 13:19:36,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:36,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:19:37,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123299872] [2020-12-22 13:19:37,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:37,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:19:37,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219712191] [2020-12-22 13:19:37,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:19:37,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:37,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:19:37,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:37,216 INFO L87 Difference]: Start difference. First operand 20001 states and 25698 transitions. Second operand 3 states. [2020-12-22 13:19:38,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:38,379 INFO L93 Difference]: Finished difference Result 39996 states and 51399 transitions. [2020-12-22 13:19:38,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:19:38,380 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 260 [2020-12-22 13:19:38,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:38,431 INFO L225 Difference]: With dead ends: 39996 [2020-12-22 13:19:38,431 INFO L226 Difference]: Without dead ends: 20013 [2020-12-22 13:19:38,456 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 13:19:38,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20013 states. [2020-12-22 13:19:39,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20013 to 20013. [2020-12-22 13:19:39,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20013 states. [2020-12-22 13:19:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20013 states to 20013 states and 25710 transitions. [2020-12-22 13:19:39,271 INFO L78 Accepts]: Start accepts. Automaton has 20013 states and 25710 transitions. Word has length 260 [2020-12-22 13:19:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:39,272 INFO L481 AbstractCegarLoop]: Abstraction has 20013 states and 25710 transitions. [2020-12-22 13:19:39,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:19:39,272 INFO L276 IsEmpty]: Start isEmpty. Operand 20013 states and 25710 transitions. [2020-12-22 13:19:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-12-22 13:19:39,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:39,320 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:39,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 13:19:39,321 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash 2099235934, now seen corresponding path program 1 times [2020-12-22 13:19:39,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:39,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491833429] [2020-12-22 13:19:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:39,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-12-22 13:19:39,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491833429] [2020-12-22 13:19:39,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:39,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:19:39,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084744540] [2020-12-22 13:19:39,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:19:39,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:39,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:19:39,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:19:39,783 INFO L87 Difference]: Start difference. First operand 20013 states and 25710 transitions. Second operand 4 states. [2020-12-22 13:19:40,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:40,667 INFO L93 Difference]: Finished difference Result 40014 states and 51411 transitions. [2020-12-22 13:19:40,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:19:40,668 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 260 [2020-12-22 13:19:40,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:40,702 INFO L225 Difference]: With dead ends: 40014 [2020-12-22 13:19:40,703 INFO L226 Difference]: Without dead ends: 20019 [2020-12-22 13:19:40,732 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 13:19:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20019 states. [2020-12-22 13:19:41,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20019 to 20019. [2020-12-22 13:19:41,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20019 states. [2020-12-22 13:19:41,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20019 states to 20019 states and 25704 transitions. [2020-12-22 13:19:41,727 INFO L78 Accepts]: Start accepts. Automaton has 20019 states and 25704 transitions. Word has length 260 [2020-12-22 13:19:41,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:41,727 INFO L481 AbstractCegarLoop]: Abstraction has 20019 states and 25704 transitions. [2020-12-22 13:19:41,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:19:41,728 INFO L276 IsEmpty]: Start isEmpty. Operand 20019 states and 25704 transitions. [2020-12-22 13:19:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2020-12-22 13:19:41,753 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:41,754 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:41,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 13:19:41,754 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:41,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:41,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1620909026, now seen corresponding path program 1 times [2020-12-22 13:19:41,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:41,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243660315] [2020-12-22 13:19:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:41,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:42,156 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:19:42,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243660315] [2020-12-22 13:19:42,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:42,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:19:42,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926638718] [2020-12-22 13:19:42,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:19:42,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:42,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:19:42,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:19:42,161 INFO L87 Difference]: Start difference. First operand 20019 states and 25704 transitions. Second operand 3 states. [2020-12-22 13:19:43,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:43,998 INFO L93 Difference]: Finished difference Result 49103 states and 63011 transitions. [2020-12-22 13:19:43,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:19:43,999 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 260 [2020-12-22 13:19:43,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:44,072 INFO L225 Difference]: With dead ends: 49103 [2020-12-22 13:19:44,072 INFO L226 Difference]: Without dead ends: 38934 [2020-12-22 13:19:44,099 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 13:19:44,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38934 states. [2020-12-22 13:19:45,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38934 to 20103. [2020-12-22 13:19:45,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20103 states. [2020-12-22 13:19:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20103 states to 20103 states and 25788 transitions. [2020-12-22 13:19:45,279 INFO L78 Accepts]: Start accepts. Automaton has 20103 states and 25788 transitions. Word has length 260 [2020-12-22 13:19:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:45,280 INFO L481 AbstractCegarLoop]: Abstraction has 20103 states and 25788 transitions. [2020-12-22 13:19:45,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:19:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 20103 states and 25788 transitions. [2020-12-22 13:19:45,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2020-12-22 13:19:45,299 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:45,299 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:45,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 13:19:45,300 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:45,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:45,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1557802947, now seen corresponding path program 1 times [2020-12-22 13:19:45,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:45,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014022824] [2020-12-22 13:19:45,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:19:45,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014022824] [2020-12-22 13:19:45,811 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:45,811 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:19:45,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613953256] [2020-12-22 13:19:45,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:19:45,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:45,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:19:45,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:19:45,814 INFO L87 Difference]: Start difference. First operand 20103 states and 25788 transitions. Second operand 4 states. [2020-12-22 13:19:49,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:49,646 INFO L93 Difference]: Finished difference Result 49102 states and 62902 transitions. [2020-12-22 13:19:49,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 13:19:49,648 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 262 [2020-12-22 13:19:49,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:49,696 INFO L225 Difference]: With dead ends: 49102 [2020-12-22 13:19:49,697 INFO L226 Difference]: Without dead ends: 29017 [2020-12-22 13:19:49,721 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 13:19:49,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29017 states. [2020-12-22 13:19:50,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29017 to 19977. [2020-12-22 13:19:50,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19977 states. [2020-12-22 13:19:50,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19977 states to 19977 states and 25536 transitions. [2020-12-22 13:19:50,827 INFO L78 Accepts]: Start accepts. Automaton has 19977 states and 25536 transitions. Word has length 262 [2020-12-22 13:19:50,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:50,828 INFO L481 AbstractCegarLoop]: Abstraction has 19977 states and 25536 transitions. [2020-12-22 13:19:50,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:19:50,828 INFO L276 IsEmpty]: Start isEmpty. Operand 19977 states and 25536 transitions. [2020-12-22 13:19:50,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2020-12-22 13:19:50,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:50,848 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:50,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 13:19:50,848 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:50,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:50,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1632826348, now seen corresponding path program 1 times [2020-12-22 13:19:50,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:50,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284909419] [2020-12-22 13:19:50,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:51,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:19:51,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284909419] [2020-12-22 13:19:51,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:51,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:19:51,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478609479] [2020-12-22 13:19:51,309 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:19:51,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:51,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:19:51,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:19:51,310 INFO L87 Difference]: Start difference. First operand 19977 states and 25536 transitions. Second operand 4 states. [2020-12-22 13:19:55,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:19:55,578 INFO L93 Difference]: Finished difference Result 98025 states and 125270 transitions. [2020-12-22 13:19:55,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:19:55,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 275 [2020-12-22 13:19:55,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:19:55,689 INFO L225 Difference]: With dead ends: 98025 [2020-12-22 13:19:55,689 INFO L226 Difference]: Without dead ends: 78066 [2020-12-22 13:19:55,722 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 13:19:55,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78066 states. [2020-12-22 13:19:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78066 to 20001. [2020-12-22 13:19:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20001 states. [2020-12-22 13:19:57,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20001 states to 20001 states and 25560 transitions. [2020-12-22 13:19:57,710 INFO L78 Accepts]: Start accepts. Automaton has 20001 states and 25560 transitions. Word has length 275 [2020-12-22 13:19:57,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:19:57,710 INFO L481 AbstractCegarLoop]: Abstraction has 20001 states and 25560 transitions. [2020-12-22 13:19:57,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:19:57,711 INFO L276 IsEmpty]: Start isEmpty. Operand 20001 states and 25560 transitions. [2020-12-22 13:19:57,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-12-22 13:19:57,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:19:57,728 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:19:57,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 13:19:57,729 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:19:57,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:19:57,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1864766783, now seen corresponding path program 1 times [2020-12-22 13:19:57,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:19:57,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942039949] [2020-12-22 13:19:57,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:19:58,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:19:58,912 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:19:58,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942039949] [2020-12-22 13:19:58,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:19:58,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:19:58,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364373420] [2020-12-22 13:19:58,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:19:58,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:19:58,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:19:58,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:19:58,919 INFO L87 Difference]: Start difference. First operand 20001 states and 25560 transitions. Second operand 5 states. [2020-12-22 13:20:01,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:01,951 INFO L93 Difference]: Finished difference Result 59715 states and 76020 transitions. [2020-12-22 13:20:01,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:01,952 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 278 [2020-12-22 13:20:01,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:02,013 INFO L225 Difference]: With dead ends: 59715 [2020-12-22 13:20:02,013 INFO L226 Difference]: Without dead ends: 39732 [2020-12-22 13:20:02,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:20:02,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39732 states. [2020-12-22 13:20:03,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39732 to 20643. [2020-12-22 13:20:03,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20643 states. [2020-12-22 13:20:03,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20643 states to 20643 states and 26370 transitions. [2020-12-22 13:20:03,725 INFO L78 Accepts]: Start accepts. Automaton has 20643 states and 26370 transitions. Word has length 278 [2020-12-22 13:20:03,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:03,726 INFO L481 AbstractCegarLoop]: Abstraction has 20643 states and 26370 transitions. [2020-12-22 13:20:03,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:20:03,726 INFO L276 IsEmpty]: Start isEmpty. Operand 20643 states and 26370 transitions. [2020-12-22 13:20:03,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-12-22 13:20:03,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:03,759 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:03,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 13:20:03,759 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:03,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:03,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1161873517, now seen corresponding path program 1 times [2020-12-22 13:20:03,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:03,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502772288] [2020-12-22 13:20:03,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:04,772 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:20:04,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502772288] [2020-12-22 13:20:04,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:04,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:20:04,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661806590] [2020-12-22 13:20:04,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:20:04,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:04,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:20:04,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:20:04,775 INFO L87 Difference]: Start difference. First operand 20643 states and 26370 transitions. Second operand 5 states. [2020-12-22 13:20:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:08,426 INFO L93 Difference]: Finished difference Result 60999 states and 77640 transitions. [2020-12-22 13:20:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:08,427 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 283 [2020-12-22 13:20:08,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:08,468 INFO L225 Difference]: With dead ends: 60999 [2020-12-22 13:20:08,468 INFO L226 Difference]: Without dead ends: 40374 [2020-12-22 13:20:08,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:20:08,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40374 states. [2020-12-22 13:20:10,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40374 to 20643. [2020-12-22 13:20:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20643 states. [2020-12-22 13:20:10,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20643 states to 20643 states and 26370 transitions. [2020-12-22 13:20:10,479 INFO L78 Accepts]: Start accepts. Automaton has 20643 states and 26370 transitions. Word has length 283 [2020-12-22 13:20:10,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:10,480 INFO L481 AbstractCegarLoop]: Abstraction has 20643 states and 26370 transitions. [2020-12-22 13:20:10,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:20:10,480 INFO L276 IsEmpty]: Start isEmpty. Operand 20643 states and 26370 transitions. [2020-12-22 13:20:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-12-22 13:20:10,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:10,506 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:10,507 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 13:20:10,507 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:10,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:10,507 INFO L82 PathProgramCache]: Analyzing trace with hash 701170060, now seen corresponding path program 1 times [2020-12-22 13:20:10,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:10,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966075296] [2020-12-22 13:20:10,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:11,452 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:20:11,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966075296] [2020-12-22 13:20:11,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:11,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:20:11,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080888390] [2020-12-22 13:20:11,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:20:11,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:11,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:20:11,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:20:11,455 INFO L87 Difference]: Start difference. First operand 20643 states and 26370 transitions. Second operand 5 states. [2020-12-22 13:20:15,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:15,796 INFO L93 Difference]: Finished difference Result 63723 states and 81132 transitions. [2020-12-22 13:20:15,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:15,797 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 288 [2020-12-22 13:20:15,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:15,848 INFO L225 Difference]: With dead ends: 63723 [2020-12-22 13:20:15,848 INFO L226 Difference]: Without dead ends: 43098 [2020-12-22 13:20:15,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:20:15,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43098 states. [2020-12-22 13:20:18,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43098 to 21531. [2020-12-22 13:20:18,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21531 states. [2020-12-22 13:20:18,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21531 states to 21531 states and 27510 transitions. [2020-12-22 13:20:18,164 INFO L78 Accepts]: Start accepts. Automaton has 21531 states and 27510 transitions. Word has length 288 [2020-12-22 13:20:18,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:18,165 INFO L481 AbstractCegarLoop]: Abstraction has 21531 states and 27510 transitions. [2020-12-22 13:20:18,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:20:18,165 INFO L276 IsEmpty]: Start isEmpty. Operand 21531 states and 27510 transitions. [2020-12-22 13:20:18,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-12-22 13:20:18,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:18,186 INFO L422 BasicCegarLoop]: trace histogram [5, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:18,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 13:20:18,186 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:18,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:18,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1596083109, now seen corresponding path program 1 times [2020-12-22 13:20:18,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:18,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413262200] [2020-12-22 13:20:18,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:20:19,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413262200] [2020-12-22 13:20:19,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839682708] [2020-12-22 13:20:19,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:20:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:21,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 5301 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-22 13:20:21,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:20:21,832 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 13:20:21,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:20:21,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2020-12-22 13:20:21,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591323801] [2020-12-22 13:20:21,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:20:21,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:21,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:20:21,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:20:21,835 INFO L87 Difference]: Start difference. First operand 21531 states and 27510 transitions. Second operand 5 states. [2020-12-22 13:20:32,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:32,378 INFO L93 Difference]: Finished difference Result 70719 states and 90325 transitions. [2020-12-22 13:20:32,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:20:32,379 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 311 [2020-12-22 13:20:32,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:32,493 INFO L225 Difference]: With dead ends: 70719 [2020-12-22 13:20:32,493 INFO L226 Difference]: Without dead ends: 70712 [2020-12-22 13:20:32,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:20:32,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70712 states. [2020-12-22 13:20:39,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70712 to 66761. [2020-12-22 13:20:39,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66761 states. [2020-12-22 13:20:39,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66761 states to 66761 states and 85272 transitions. [2020-12-22 13:20:39,329 INFO L78 Accepts]: Start accepts. Automaton has 66761 states and 85272 transitions. Word has length 311 [2020-12-22 13:20:39,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:39,330 INFO L481 AbstractCegarLoop]: Abstraction has 66761 states and 85272 transitions. [2020-12-22 13:20:39,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:20:39,330 INFO L276 IsEmpty]: Start isEmpty. Operand 66761 states and 85272 transitions. [2020-12-22 13:20:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-12-22 13:20:39,382 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:39,382 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:39,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 13:20:39,587 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:39,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:39,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1070638474, now seen corresponding path program 1 times [2020-12-22 13:20:39,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:39,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135097963] [2020-12-22 13:20:39,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:39,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:20:40,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135097963] [2020-12-22 13:20:40,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650370390] [2020-12-22 13:20:40,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:20:42,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:42,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 5357 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:20:42,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:20:43,045 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:20:43,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:20:43,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:20:43,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289266629] [2020-12-22 13:20:43,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:20:43,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:43,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:20:43,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:20:43,048 INFO L87 Difference]: Start difference. First operand 66761 states and 85272 transitions. Second operand 3 states. [2020-12-22 13:20:50,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:50,094 INFO L93 Difference]: Finished difference Result 114340 states and 146028 transitions. [2020-12-22 13:20:50,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:20:50,095 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 317 [2020-12-22 13:20:50,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:50,154 INFO L225 Difference]: With dead ends: 114340 [2020-12-22 13:20:50,154 INFO L226 Difference]: Without dead ends: 43115 [2020-12-22 13:20:50,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 319 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:20:50,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43115 states. [2020-12-22 13:20:54,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43115 to 42953. [2020-12-22 13:20:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42953 states. [2020-12-22 13:20:54,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42953 states to 42953 states and 54692 transitions. [2020-12-22 13:20:54,321 INFO L78 Accepts]: Start accepts. Automaton has 42953 states and 54692 transitions. Word has length 317 [2020-12-22 13:20:54,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:54,321 INFO L481 AbstractCegarLoop]: Abstraction has 42953 states and 54692 transitions. [2020-12-22 13:20:54,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:54,321 INFO L276 IsEmpty]: Start isEmpty. Operand 42953 states and 54692 transitions. [2020-12-22 13:20:54,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-12-22 13:20:54,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:54,353 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:54,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 13:20:54,555 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:54,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:54,556 INFO L82 PathProgramCache]: Analyzing trace with hash -174407304, now seen corresponding path program 1 times [2020-12-22 13:20:54,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:54,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946508971] [2020-12-22 13:20:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:54,852 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:20:54,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946508971] [2020-12-22 13:20:54,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:54,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:20:54,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115373183] [2020-12-22 13:20:54,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:20:54,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:54,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:20:54,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:54,865 INFO L87 Difference]: Start difference. First operand 42953 states and 54692 transitions. Second operand 3 states. [2020-12-22 13:20:57,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:20:57,197 INFO L93 Difference]: Finished difference Result 62135 states and 79097 transitions. [2020-12-22 13:20:57,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:20:57,198 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 317 [2020-12-22 13:20:57,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:20:57,219 INFO L225 Difference]: With dead ends: 62135 [2020-12-22 13:20:57,220 INFO L226 Difference]: Without dead ends: 19200 [2020-12-22 13:20:57,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:20:57,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19200 states. [2020-12-22 13:20:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19200 to 19200. [2020-12-22 13:20:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19200 states. [2020-12-22 13:20:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19200 states to 19200 states and 24425 transitions. [2020-12-22 13:20:59,221 INFO L78 Accepts]: Start accepts. Automaton has 19200 states and 24425 transitions. Word has length 317 [2020-12-22 13:20:59,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:20:59,222 INFO L481 AbstractCegarLoop]: Abstraction has 19200 states and 24425 transitions. [2020-12-22 13:20:59,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:20:59,222 INFO L276 IsEmpty]: Start isEmpty. Operand 19200 states and 24425 transitions. [2020-12-22 13:20:59,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2020-12-22 13:20:59,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:20:59,238 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:20:59,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 13:20:59,238 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:20:59,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:20:59,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1558032638, now seen corresponding path program 1 times [2020-12-22 13:20:59,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:20:59,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796661808] [2020-12-22 13:20:59,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:20:59,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:20:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-12-22 13:20:59,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796661808] [2020-12-22 13:20:59,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:20:59,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 13:20:59,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271222160] [2020-12-22 13:20:59,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 13:20:59,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:20:59,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 13:20:59,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 13:20:59,633 INFO L87 Difference]: Start difference. First operand 19200 states and 24425 transitions. Second operand 4 states. [2020-12-22 13:21:03,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:03,486 INFO L93 Difference]: Finished difference Result 56057 states and 71364 transitions. [2020-12-22 13:21:03,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 13:21:03,487 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 324 [2020-12-22 13:21:03,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:03,527 INFO L225 Difference]: With dead ends: 56057 [2020-12-22 13:21:03,528 INFO L226 Difference]: Without dead ends: 37048 [2020-12-22 13:21:03,545 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 13:21:03,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37048 states. [2020-12-22 13:21:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37048 to 13024. [2020-12-22 13:21:05,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13024 states. [2020-12-22 13:21:05,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13024 states to 13024 states and 16551 transitions. [2020-12-22 13:21:05,035 INFO L78 Accepts]: Start accepts. Automaton has 13024 states and 16551 transitions. Word has length 324 [2020-12-22 13:21:05,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:05,036 INFO L481 AbstractCegarLoop]: Abstraction has 13024 states and 16551 transitions. [2020-12-22 13:21:05,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 13:21:05,036 INFO L276 IsEmpty]: Start isEmpty. Operand 13024 states and 16551 transitions. [2020-12-22 13:21:05,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-22 13:21:05,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:05,046 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:05,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 13:21:05,047 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:05,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:05,047 INFO L82 PathProgramCache]: Analyzing trace with hash 748865555, now seen corresponding path program 1 times [2020-12-22 13:21:05,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:05,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165715871] [2020-12-22 13:21:05,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:05,565 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:21:05,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165715871] [2020-12-22 13:21:05,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114191006] [2020-12-22 13:21:05,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:21:07,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:07,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 5523 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-22 13:21:07,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:21:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-12-22 13:21:07,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:21:07,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-12-22 13:21:07,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254010162] [2020-12-22 13:21:07,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:21:07,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:07,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:21:07,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:21:07,786 INFO L87 Difference]: Start difference. First operand 13024 states and 16551 transitions. Second operand 3 states. [2020-12-22 13:21:09,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:09,024 INFO L93 Difference]: Finished difference Result 23211 states and 29525 transitions. [2020-12-22 13:21:09,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:21:09,030 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 336 [2020-12-22 13:21:09,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:09,043 INFO L225 Difference]: With dead ends: 23211 [2020-12-22 13:21:09,043 INFO L226 Difference]: Without dead ends: 10378 [2020-12-22 13:21:09,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 338 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:21:09,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10378 states. [2020-12-22 13:21:10,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10378 to 8382. [2020-12-22 13:21:10,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8382 states. [2020-12-22 13:21:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8382 states to 8382 states and 10682 transitions. [2020-12-22 13:21:10,139 INFO L78 Accepts]: Start accepts. Automaton has 8382 states and 10682 transitions. Word has length 336 [2020-12-22 13:21:10,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:10,140 INFO L481 AbstractCegarLoop]: Abstraction has 8382 states and 10682 transitions. [2020-12-22 13:21:10,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:21:10,140 INFO L276 IsEmpty]: Start isEmpty. Operand 8382 states and 10682 transitions. [2020-12-22 13:21:10,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-12-22 13:21:10,150 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:10,155 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:10,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:21:10,369 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:10,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:10,370 INFO L82 PathProgramCache]: Analyzing trace with hash -765458194, now seen corresponding path program 1 times [2020-12-22 13:21:10,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:10,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417814891] [2020-12-22 13:21:10,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:10,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:11,204 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 13:21:11,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417814891] [2020-12-22 13:21:11,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:11,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:21:11,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396715043] [2020-12-22 13:21:11,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:21:11,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:11,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:21:11,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:21:11,207 INFO L87 Difference]: Start difference. First operand 8382 states and 10682 transitions. Second operand 5 states. [2020-12-22 13:21:15,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:15,122 INFO L93 Difference]: Finished difference Result 39664 states and 50609 transitions. [2020-12-22 13:21:15,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:21:15,123 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 349 [2020-12-22 13:21:15,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:15,271 INFO L225 Difference]: With dead ends: 39664 [2020-12-22 13:21:15,271 INFO L226 Difference]: Without dead ends: 31473 [2020-12-22 13:21:15,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:21:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31473 states. [2020-12-22 13:21:16,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31473 to 8409. [2020-12-22 13:21:16,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8409 states. [2020-12-22 13:21:16,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8409 states to 8409 states and 10709 transitions. [2020-12-22 13:21:16,351 INFO L78 Accepts]: Start accepts. Automaton has 8409 states and 10709 transitions. Word has length 349 [2020-12-22 13:21:16,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:16,351 INFO L481 AbstractCegarLoop]: Abstraction has 8409 states and 10709 transitions. [2020-12-22 13:21:16,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:21:16,351 INFO L276 IsEmpty]: Start isEmpty. Operand 8409 states and 10709 transitions. [2020-12-22 13:21:16,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-12-22 13:21:16,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:16,359 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:16,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 13:21:16,359 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:16,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:16,360 INFO L82 PathProgramCache]: Analyzing trace with hash -1076425526, now seen corresponding path program 1 times [2020-12-22 13:21:16,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:16,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224054420] [2020-12-22 13:21:16,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:16,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:17,355 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 13:21:17,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224054420] [2020-12-22 13:21:17,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:17,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:21:17,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519617896] [2020-12-22 13:21:17,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:21:17,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:17,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:21:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:21:17,358 INFO L87 Difference]: Start difference. First operand 8409 states and 10709 transitions. Second operand 5 states. [2020-12-22 13:21:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:24,191 INFO L93 Difference]: Finished difference Result 54897 states and 70094 transitions. [2020-12-22 13:21:24,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:21:24,194 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 351 [2020-12-22 13:21:24,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:24,243 INFO L225 Difference]: With dead ends: 54897 [2020-12-22 13:21:24,243 INFO L226 Difference]: Without dead ends: 46679 [2020-12-22 13:21:24,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 13:21:24,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46679 states. [2020-12-22 13:21:25,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46679 to 8436. [2020-12-22 13:21:25,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8436 states. [2020-12-22 13:21:25,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8436 states to 8436 states and 10736 transitions. [2020-12-22 13:21:25,739 INFO L78 Accepts]: Start accepts. Automaton has 8436 states and 10736 transitions. Word has length 351 [2020-12-22 13:21:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:25,739 INFO L481 AbstractCegarLoop]: Abstraction has 8436 states and 10736 transitions. [2020-12-22 13:21:25,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:21:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 8436 states and 10736 transitions. [2020-12-22 13:21:25,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 354 [2020-12-22 13:21:25,750 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:25,751 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:25,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-12-22 13:21:25,751 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:25,752 INFO L82 PathProgramCache]: Analyzing trace with hash 93460038, now seen corresponding path program 1 times [2020-12-22 13:21:25,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:25,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690045962] [2020-12-22 13:21:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:26,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:26,594 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2020-12-22 13:21:26,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690045962] [2020-12-22 13:21:26,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:26,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 13:21:26,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583014712] [2020-12-22 13:21:26,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:21:26,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:26,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:21:26,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:21:26,596 INFO L87 Difference]: Start difference. First operand 8436 states and 10736 transitions. Second operand 6 states. [2020-12-22 13:21:29,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:29,866 INFO L93 Difference]: Finished difference Result 26890 states and 34284 transitions. [2020-12-22 13:21:29,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:21:29,867 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 353 [2020-12-22 13:21:29,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:29,884 INFO L225 Difference]: With dead ends: 26890 [2020-12-22 13:21:29,885 INFO L226 Difference]: Without dead ends: 18645 [2020-12-22 13:21:29,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:21:29,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18645 states. [2020-12-22 13:21:31,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18645 to 8448. [2020-12-22 13:21:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8448 states. [2020-12-22 13:21:31,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8448 states to 8448 states and 10748 transitions. [2020-12-22 13:21:31,275 INFO L78 Accepts]: Start accepts. Automaton has 8448 states and 10748 transitions. Word has length 353 [2020-12-22 13:21:31,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:31,275 INFO L481 AbstractCegarLoop]: Abstraction has 8448 states and 10748 transitions. [2020-12-22 13:21:31,275 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:21:31,275 INFO L276 IsEmpty]: Start isEmpty. Operand 8448 states and 10748 transitions. [2020-12-22 13:21:31,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2020-12-22 13:21:31,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:31,283 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:31,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-12-22 13:21:31,283 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:31,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:31,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1902005034, now seen corresponding path program 1 times [2020-12-22 13:21:31,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:31,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327077553] [2020-12-22 13:21:31,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:32,030 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 13:21:32,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327077553] [2020-12-22 13:21:32,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:32,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:21:32,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219349586] [2020-12-22 13:21:32,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:21:32,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:32,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:21:32,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:21:32,033 INFO L87 Difference]: Start difference. First operand 8448 states and 10748 transitions. Second operand 5 states. [2020-12-22 13:21:37,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:37,037 INFO L93 Difference]: Finished difference Result 38278 states and 48766 transitions. [2020-12-22 13:21:37,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:21:37,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 355 [2020-12-22 13:21:37,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:37,069 INFO L225 Difference]: With dead ends: 38278 [2020-12-22 13:21:37,069 INFO L226 Difference]: Without dead ends: 30021 [2020-12-22 13:21:37,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 13:21:37,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30021 states. [2020-12-22 13:21:38,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30021 to 8460. [2020-12-22 13:21:38,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8460 states. [2020-12-22 13:21:38,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8460 states to 8460 states and 10760 transitions. [2020-12-22 13:21:38,607 INFO L78 Accepts]: Start accepts. Automaton has 8460 states and 10760 transitions. Word has length 355 [2020-12-22 13:21:38,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:38,607 INFO L481 AbstractCegarLoop]: Abstraction has 8460 states and 10760 transitions. [2020-12-22 13:21:38,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:21:38,608 INFO L276 IsEmpty]: Start isEmpty. Operand 8460 states and 10760 transitions. [2020-12-22 13:21:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 358 [2020-12-22 13:21:38,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:38,616 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:38,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-12-22 13:21:38,616 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:38,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:38,617 INFO L82 PathProgramCache]: Analyzing trace with hash -2089905970, now seen corresponding path program 1 times [2020-12-22 13:21:38,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:38,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959933779] [2020-12-22 13:21:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:39,385 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 13:21:39,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959933779] [2020-12-22 13:21:39,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:39,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 13:21:39,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795314001] [2020-12-22 13:21:39,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 13:21:39,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:39,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 13:21:39,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 13:21:39,388 INFO L87 Difference]: Start difference. First operand 8460 states and 10760 transitions. Second operand 6 states. [2020-12-22 13:21:44,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:44,872 INFO L93 Difference]: Finished difference Result 37656 states and 47950 transitions. [2020-12-22 13:21:44,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 13:21:44,873 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 357 [2020-12-22 13:21:44,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:44,904 INFO L225 Difference]: With dead ends: 37656 [2020-12-22 13:21:44,904 INFO L226 Difference]: Without dead ends: 29387 [2020-12-22 13:21:44,915 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:21:44,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29387 states. [2020-12-22 13:21:46,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29387 to 8476. [2020-12-22 13:21:46,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8476 states. [2020-12-22 13:21:46,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8476 states to 8476 states and 10776 transitions. [2020-12-22 13:21:46,613 INFO L78 Accepts]: Start accepts. Automaton has 8476 states and 10776 transitions. Word has length 357 [2020-12-22 13:21:46,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:46,613 INFO L481 AbstractCegarLoop]: Abstraction has 8476 states and 10776 transitions. [2020-12-22 13:21:46,613 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 13:21:46,613 INFO L276 IsEmpty]: Start isEmpty. Operand 8476 states and 10776 transitions. [2020-12-22 13:21:46,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2020-12-22 13:21:46,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:46,621 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:46,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 13:21:46,622 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:46,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:46,623 INFO L82 PathProgramCache]: Analyzing trace with hash -2052033326, now seen corresponding path program 1 times [2020-12-22 13:21:46,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:46,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854288227] [2020-12-22 13:21:46,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:47,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:47,359 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 13:21:47,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854288227] [2020-12-22 13:21:47,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:47,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 13:21:47,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144210185] [2020-12-22 13:21:47,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 13:21:47,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:47,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 13:21:47,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 13:21:47,362 INFO L87 Difference]: Start difference. First operand 8476 states and 10776 transitions. Second operand 5 states. [2020-12-22 13:21:53,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:53,004 INFO L93 Difference]: Finished difference Result 36428 states and 46368 transitions. [2020-12-22 13:21:53,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 13:21:53,005 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 359 [2020-12-22 13:21:53,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:53,033 INFO L225 Difference]: With dead ends: 36428 [2020-12-22 13:21:53,034 INFO L226 Difference]: Without dead ends: 28143 [2020-12-22 13:21:53,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 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 13:21:53,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28143 states. [2020-12-22 13:21:54,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28143 to 8488. [2020-12-22 13:21:54,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8488 states. [2020-12-22 13:21:54,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 10788 transitions. [2020-12-22 13:21:54,786 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 10788 transitions. Word has length 359 [2020-12-22 13:21:54,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:54,786 INFO L481 AbstractCegarLoop]: Abstraction has 8488 states and 10788 transitions. [2020-12-22 13:21:54,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 13:21:54,786 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 10788 transitions. [2020-12-22 13:21:54,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2020-12-22 13:21:54,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:54,795 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:54,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-12-22 13:21:54,795 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:54,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:54,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1529417098, now seen corresponding path program 1 times [2020-12-22 13:21:54,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:54,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80567075] [2020-12-22 13:21:54,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:55,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:21:55,564 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 13:21:55,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80567075] [2020-12-22 13:21:55,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 13:21:55,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 13:21:55,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439597901] [2020-12-22 13:21:55,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 13:21:55,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:21:55,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 13:21:55,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 13:21:55,567 INFO L87 Difference]: Start difference. First operand 8488 states and 10788 transitions. Second operand 3 states. [2020-12-22 13:21:57,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:21:57,723 INFO L93 Difference]: Finished difference Result 16989 states and 21572 transitions. [2020-12-22 13:21:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 13:21:57,724 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 361 [2020-12-22 13:21:57,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:21:57,733 INFO L225 Difference]: With dead ends: 16989 [2020-12-22 13:21:57,733 INFO L226 Difference]: Without dead ends: 8692 [2020-12-22 13:21:57,740 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 13:21:57,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8692 states. [2020-12-22 13:21:59,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8692 to 8505. [2020-12-22 13:21:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8505 states. [2020-12-22 13:21:59,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8505 states to 8505 states and 10805 transitions. [2020-12-22 13:21:59,259 INFO L78 Accepts]: Start accepts. Automaton has 8505 states and 10805 transitions. Word has length 361 [2020-12-22 13:21:59,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:21:59,260 INFO L481 AbstractCegarLoop]: Abstraction has 8505 states and 10805 transitions. [2020-12-22 13:21:59,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 13:21:59,260 INFO L276 IsEmpty]: Start isEmpty. Operand 8505 states and 10805 transitions. [2020-12-22 13:21:59,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-12-22 13:21:59,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:21:59,271 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 13:21:59,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-12-22 13:21:59,271 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:21:59,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:21:59,272 INFO L82 PathProgramCache]: Analyzing trace with hash 932813163, now seen corresponding path program 1 times [2020-12-22 13:21:59,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:21:59,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798047922] [2020-12-22 13:21:59,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:21:59,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:22:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 13:22:00,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798047922] [2020-12-22 13:22:00,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640815777] [2020-12-22 13:22:00,089 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 13:22:02,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:22:02,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 5766 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 13:22:02,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 13:22:02,831 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-12-22 13:22:02,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 13:22:02,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4] total 10 [2020-12-22 13:22:02,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241285492] [2020-12-22 13:22:02,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 13:22:02,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 13:22:02,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 13:22:02,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-12-22 13:22:02,834 INFO L87 Difference]: Start difference. First operand 8505 states and 10805 transitions. Second operand 8 states. [2020-12-22 13:22:18,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 13:22:18,463 INFO L93 Difference]: Finished difference Result 63685 states and 80947 transitions. [2020-12-22 13:22:18,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 13:22:18,463 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 369 [2020-12-22 13:22:18,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 13:22:18,521 INFO L225 Difference]: With dead ends: 63685 [2020-12-22 13:22:18,521 INFO L226 Difference]: Without dead ends: 55371 [2020-12-22 13:22:18,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 369 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-12-22 13:22:18,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55371 states. [2020-12-22 13:22:20,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55371 to 8517. [2020-12-22 13:22:20,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8517 states. [2020-12-22 13:22:20,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8517 states to 8517 states and 10821 transitions. [2020-12-22 13:22:20,881 INFO L78 Accepts]: Start accepts. Automaton has 8517 states and 10821 transitions. Word has length 369 [2020-12-22 13:22:20,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 13:22:20,881 INFO L481 AbstractCegarLoop]: Abstraction has 8517 states and 10821 transitions. [2020-12-22 13:22:20,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 13:22:20,881 INFO L276 IsEmpty]: Start isEmpty. Operand 8517 states and 10821 transitions. [2020-12-22 13:22:20,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 370 [2020-12-22 13:22:20,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 13:22:20,890 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 13:22:21,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 13:22:21,105 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 13:22:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 13:22:21,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1014264575, now seen corresponding path program 1 times [2020-12-22 13:22:21,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 13:22:21,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772976419] [2020-12-22 13:22:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 13:22:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 13:22:21,895 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 50 proven. 1 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-22 13:22:21,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772976419] [2020-12-22 13:22:21,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274223180] [2020-12-22 13:22:21,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true