/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/loops/insertion_sort-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:37:12,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:37:12,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:37:12,479 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:37:12,480 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:37:12,482 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:37:12,484 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:37:12,488 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:37:12,490 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:37:12,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:37:12,494 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:37:12,495 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 17:37:12,495 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:37:12,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:37:12,498 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:37:12,499 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:37:12,501 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:37:12,501 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:37:12,503 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:37:12,507 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:37:12,508 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:37:12,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:37:12,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:37:12,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:37:12,516 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 17:37:12,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 17:37:12,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 17:37:12,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 17:37:12,517 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 17:37:12,518 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 17:37:12,518 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 17:37:12,519 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 17:37:12,520 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 17:37:12,520 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 17:37:12,521 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 17:37:12,521 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 17:37:12,521 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 17:37:12,522 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 17:37:12,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:37:12,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:37:12,524 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:37:12,527 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:37:12,540 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:37:12,541 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:37:12,543 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:37:12,543 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:37:12,543 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:37:12,543 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:37:12,544 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:37:12,544 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:37:12,544 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:37:12,544 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:37:12,545 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:37:12,545 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:37:12,545 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:37:12,545 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:37:12,545 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:37:12,545 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:37:12,545 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:37:12,546 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:37:12,546 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:37:12,546 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:37:12,546 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:37:12,547 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:37:12,547 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:37:12,824 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:37:12,837 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:37:12,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:37:12,839 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:37:12,840 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:37:12,841 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/insertion_sort-2.c [2021-05-02 17:37:12,884 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cad1f8d8a/7818d7777dcc42f3808cafed63b1e946/FLAGa983f964d [2021-05-02 17:37:13,300 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:37:13,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c [2021-05-02 17:37:13,305 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cad1f8d8a/7818d7777dcc42f3808cafed63b1e946/FLAGa983f964d [2021-05-02 17:37:13,315 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cad1f8d8a/7818d7777dcc42f3808cafed63b1e946 [2021-05-02 17:37:13,317 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:37:13,318 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:37:13,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:37:13,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:37:13,324 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:37:13,325 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,325 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a6e0bd3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13, skipping insertion in model container [2021-05-02 17:37:13,325 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,330 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:37:13,340 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:37:13,449 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2021-05-02 17:37:13,463 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:37:13,468 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:37:13,527 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/insertion_sort-2.c[328,341] [2021-05-02 17:37:13,542 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:37:13,552 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:37:13,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13 WrapperNode [2021-05-02 17:37:13,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:37:13,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:37:13,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:37:13,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:37:13,561 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,572 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,572 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,583 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:13,595 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:37:13,596 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:37:13,596 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:37:13,596 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:37:13,597 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (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 [2021-05-02 17:37:13,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:37:13,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:37:13,710 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:37:13,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:37:13,711 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:37:13,711 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:37:13,711 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:37:13,711 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:37:13,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:37:13,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:37:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 17:37:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 17:37:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:37:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:37:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:37:13,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:37:13,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:37:13,713 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:37:13,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:37:13,960 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:37:13,960 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-05-02 17:37:13,961 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:37:13 BoogieIcfgContainer [2021-05-02 17:37:13,961 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:37:13,961 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:37:13,961 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:37:13,962 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:37:13,964 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:37:13" (1/1) ... [2021-05-02 17:37:14,000 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:37:14 BasicIcfg [2021-05-02 17:37:14,000 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:37:14,001 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:37:14,001 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:37:14,003 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:37:14,003 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:37:13" (1/4) ... [2021-05-02 17:37:14,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326e8276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:37:14, skipping insertion in model container [2021-05-02 17:37:14,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:13" (2/4) ... [2021-05-02 17:37:14,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326e8276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:37:14, skipping insertion in model container [2021-05-02 17:37:14,004 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:37:13" (3/4) ... [2021-05-02 17:37:14,004 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326e8276 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:37:14, skipping insertion in model container [2021-05-02 17:37:14,005 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:37:14" (4/4) ... [2021-05-02 17:37:14,005 INFO L111 eAbstractionObserver]: Analyzing ICFG insertion_sort-2.cJordan [2021-05-02 17:37:14,012 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:37:14,015 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:37:14,036 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:37:14,067 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:37:14,067 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:37:14,068 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:37:14,068 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:37:14,068 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:37:14,068 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:37:14,068 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:37:14,068 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:37:14,076 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:37:14,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 17:37:14,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:14,081 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:14,081 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:14,084 INFO L82 PathProgramCache]: Analyzing trace with hash -189909079, now seen corresponding path program 1 times [2021-05-02 17:37:14,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:14,092 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737877079] [2021-05-02 17:37:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:14,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:14,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737877079] [2021-05-02 17:37:14,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737877079] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:14,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:14,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:37:14,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349448012] [2021-05-02 17:37:14,286 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:37:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:14,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:37:14,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:37:14,300 INFO L87 Difference]: Start difference. First operand has 31 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 24 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:14,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:14,394 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2021-05-02 17:37:14,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:37:14,396 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 17:37:14,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:14,401 INFO L225 Difference]: With dead ends: 31 [2021-05-02 17:37:14,401 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 17:37:14,402 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:37:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 17:37:14,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 17:37:14,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:14,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-05-02 17:37:14,424 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2021-05-02 17:37:14,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:14,424 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-05-02 17:37:14,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:14,425 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-05-02 17:37:14,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 17:37:14,425 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:14,425 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:14,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:37:14,426 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:14,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:14,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1109859861, now seen corresponding path program 1 times [2021-05-02 17:37:14,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:14,426 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836351518] [2021-05-02 17:37:14,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:14,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:14,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:14,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836351518] [2021-05-02 17:37:14,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836351518] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:14,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:14,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 17:37:14,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002686940] [2021-05-02 17:37:14,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 17:37:14,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:14,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 17:37:14,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:37:14,515 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:14,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:14,576 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2021-05-02 17:37:14,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:37:14,577 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 17:37:14,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:14,577 INFO L225 Difference]: With dead ends: 32 [2021-05-02 17:37:14,577 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 17:37:14,578 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:37:14,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 17:37:14,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 17:37:14,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:14,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 17:37:14,581 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 15 [2021-05-02 17:37:14,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:14,581 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 17:37:14,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:14,581 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 17:37:14,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 17:37:14,582 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:14,582 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:14,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:37:14,582 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:14,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:14,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1012960919, now seen corresponding path program 1 times [2021-05-02 17:37:14,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:14,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94215551] [2021-05-02 17:37:14,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:14,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:14,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94215551] [2021-05-02 17:37:14,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94215551] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:14,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414546188] [2021-05-02 17:37:14,834 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 [2021-05-02 17:37:14,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:14,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 17:37:14,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:14,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:15,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:15,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414546188] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:15,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:15,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 10 [2021-05-02 17:37:15,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608613873] [2021-05-02 17:37:15,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:37:15,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:15,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:37:15,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:37:15,014 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:15,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:15,185 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2021-05-02 17:37:15,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:37:15,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 17:37:15,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:15,189 INFO L225 Difference]: With dead ends: 42 [2021-05-02 17:37:15,189 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 17:37:15,190 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 212.3ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:37:15,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 17:37:15,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-05-02 17:37:15,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:15,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-05-02 17:37:15,197 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 17 [2021-05-02 17:37:15,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:15,197 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-05-02 17:37:15,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:15,198 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-05-02 17:37:15,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 17:37:15,198 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:15,198 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:15,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 17:37:15,414 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:15,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:15,414 INFO L82 PathProgramCache]: Analyzing trace with hash -442336581, now seen corresponding path program 1 times [2021-05-02 17:37:15,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:15,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116765010] [2021-05-02 17:37:15,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:15,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:15,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:15,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:37:15,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:15,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116765010] [2021-05-02 17:37:15,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116765010] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:15,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:15,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:37:15,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471437198] [2021-05-02 17:37:15,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:37:15,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:15,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:37:15,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:37:15,489 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:15,540 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2021-05-02 17:37:15,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:37:15,540 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 17:37:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:15,541 INFO L225 Difference]: With dead ends: 40 [2021-05-02 17:37:15,541 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 17:37:15,541 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.0ms TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:37:15,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 17:37:15,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2021-05-02 17:37:15,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:15,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 17:37:15,544 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 25 [2021-05-02 17:37:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:15,544 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 17:37:15,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:15,544 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 17:37:15,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 17:37:15,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:15,545 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:15,545 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 17:37:15,545 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:15,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:15,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1354614778, now seen corresponding path program 1 times [2021-05-02 17:37:15,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:15,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507481489] [2021-05-02 17:37:15,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:15,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:15,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:15,924 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:15,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:15,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507481489] [2021-05-02 17:37:15,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507481489] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:15,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674833186] [2021-05-02 17:37:15,924 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 [2021-05-02 17:37:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:15,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:37:15,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:15,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:37:16,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:37:16,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:16,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:16,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,139 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:16,139 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:30 [2021-05-02 17:37:16,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,178 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:16,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:37:16,180 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:16,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:16,182 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:16,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:37:16,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:37:16,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674833186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:16,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:16,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 23 [2021-05-02 17:37:16,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597217721] [2021-05-02 17:37:16,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 17:37:16,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:16,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 17:37:16,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=420, Unknown=0, NotChecked=0, Total=506 [2021-05-02 17:37:16,224 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 20 states have internal predecessors, (34), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:16,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:16,740 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2021-05-02 17:37:16,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 17:37:16,741 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 20 states have internal predecessors, (34), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2021-05-02 17:37:16,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:16,742 INFO L225 Difference]: With dead ends: 69 [2021-05-02 17:37:16,743 INFO L226 Difference]: Without dead ends: 69 [2021-05-02 17:37:16,743 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 650.0ms TimeCoverageRelationStatistics Valid=214, Invalid=1046, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:37:16,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-05-02 17:37:16,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2021-05-02 17:37:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.236842105263158) internal successors, (47), 39 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:37:16,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2021-05-02 17:37:16,749 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 25 [2021-05-02 17:37:16,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:16,749 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2021-05-02 17:37:16,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 20 states have internal predecessors, (34), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:16,749 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2021-05-02 17:37:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 17:37:16,750 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:16,750 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:16,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:16,957 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:16,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:16,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1272155915, now seen corresponding path program 1 times [2021-05-02 17:37:16,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:16,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423296725] [2021-05-02 17:37:16,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:17,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:17,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:17,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:17,305 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:17,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:17,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423296725] [2021-05-02 17:37:17,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423296725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:17,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059212845] [2021-05-02 17:37:17,306 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 [2021-05-02 17:37:17,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:17,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 17:37:17,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:17,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,492 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 17:37:17,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-05-02 17:37:17,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:17,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:17,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:17,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:44 [2021-05-02 17:37:17,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,674 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-05-02 17:37:17,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2021-05-02 17:37:17,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:17,690 INFO L628 ElimStorePlain]: treesize reduction 3, result has 92.3 percent of original size [2021-05-02 17:37:17,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,697 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:17,698 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:33 [2021-05-02 17:37:17,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,880 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-05-02 17:37:17,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2021-05-02 17:37:17,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:17,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:17,890 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:17,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:3 [2021-05-02 17:37:17,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:17,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:37:17,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059212845] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:17,955 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:17,955 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2021-05-02 17:37:17,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025427895] [2021-05-02 17:37:17,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 17:37:17,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:17,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 17:37:17,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=670, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:37:17,956 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 25 states have internal predecessors, (44), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:18,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:18,962 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2021-05-02 17:37:18,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 17:37:18,963 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 25 states have internal predecessors, (44), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 17:37:18,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:18,966 INFO L225 Difference]: With dead ends: 92 [2021-05-02 17:37:18,966 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 17:37:18,967 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1104.6ms TimeCoverageRelationStatistics Valid=283, Invalid=1787, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 17:37:18,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 17:37:18,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 49. [2021-05-02 17:37:18,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 42 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:37:18,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2021-05-02 17:37:18,985 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 28 [2021-05-02 17:37:18,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:18,985 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2021-05-02 17:37:18,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 25 states have internal predecessors, (44), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:18,985 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2021-05-02 17:37:18,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 17:37:18,986 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:18,986 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:19,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:19,205 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:19,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:19,205 INFO L82 PathProgramCache]: Analyzing trace with hash -551964914, now seen corresponding path program 1 times [2021-05-02 17:37:19,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:19,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563967689] [2021-05-02 17:37:19,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:19,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:37:19,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:19,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563967689] [2021-05-02 17:37:19,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563967689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:19,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258282299] [2021-05-02 17:37:19,264 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 [2021-05-02 17:37:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 17:37:19,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:19,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:19,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:19,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:19,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:19,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:37:19,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258282299] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:19,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:19,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 17:37:19,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041885657] [2021-05-02 17:37:19,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:37:19,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:19,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:37:19,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:37:19,389 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:19,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:19,558 INFO L93 Difference]: Finished difference Result 66 states and 78 transitions. [2021-05-02 17:37:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:37:19,558 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 17:37:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:19,559 INFO L225 Difference]: With dead ends: 66 [2021-05-02 17:37:19,559 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 17:37:19,559 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.6ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:37:19,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 17:37:19,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 51. [2021-05-02 17:37:19,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.2093023255813953) internal successors, (52), 44 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:37:19,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-05-02 17:37:19,561 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 31 [2021-05-02 17:37:19,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:19,562 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-05-02 17:37:19,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:19,562 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-05-02 17:37:19,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-02 17:37:19,562 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:19,562 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:19,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:19,763 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:19,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1244986445, now seen corresponding path program 2 times [2021-05-02 17:37:19,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:19,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199115942] [2021-05-02 17:37:19,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:19,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:19,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:19,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:19,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199115942] [2021-05-02 17:37:19,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1199115942] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:19,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691456321] [2021-05-02 17:37:19,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:19,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:37:19,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:19,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:37:19,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:19,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:20,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:20,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691456321] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:20,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:20,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 17:37:20,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563607641] [2021-05-02 17:37:20,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:37:20,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:20,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:37:20,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:37:20,056 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:20,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:20,175 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2021-05-02 17:37:20,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:37:20,176 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2021-05-02 17:37:20,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:20,176 INFO L225 Difference]: With dead ends: 95 [2021-05-02 17:37:20,176 INFO L226 Difference]: Without dead ends: 95 [2021-05-02 17:37:20,177 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:37:20,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-02 17:37:20,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 64. [2021-05-02 17:37:20,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.1964285714285714) internal successors, (67), 57 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:37:20,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-05-02 17:37:20,180 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 31 [2021-05-02 17:37:20,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:20,180 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-05-02 17:37:20,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:20,180 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-05-02 17:37:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 17:37:20,180 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:20,180 INFO L523 BasicCegarLoop]: trace histogram [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] [2021-05-02 17:37:20,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:37:20,397 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:20,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:20,397 INFO L82 PathProgramCache]: Analyzing trace with hash 567979469, now seen corresponding path program 1 times [2021-05-02 17:37:20,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:20,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371046207] [2021-05-02 17:37:20,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:20,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-05-02 17:37:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:37:20,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:20,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371046207] [2021-05-02 17:37:20,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371046207] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:20,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162972867] [2021-05-02 17:37:20,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:37:20,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:20,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:20,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:20,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:20,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:20,677 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:37:20,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [162972867] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:20,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:20,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-05-02 17:37:20,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187142988] [2021-05-02 17:37:20,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:37:20,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:20,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:37:20,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:37:20,679 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:20,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:20,834 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2021-05-02 17:37:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 17:37:20,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2021-05-02 17:37:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:20,835 INFO L225 Difference]: With dead ends: 94 [2021-05-02 17:37:20,835 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 17:37:20,835 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:37:20,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 17:37:20,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 60. [2021-05-02 17:37:20,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.1923076923076923) internal successors, (62), 53 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:37:20,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2021-05-02 17:37:20,838 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 33 [2021-05-02 17:37:20,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:20,838 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2021-05-02 17:37:20,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2021-05-02 17:37:20,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 17:37:20,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:20,839 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:21,055 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:21,055 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:21,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:21,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1701261365, now seen corresponding path program 3 times [2021-05-02 17:37:21,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:21,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901675048] [2021-05-02 17:37:21,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:21,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:21,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:37:21,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:21,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901675048] [2021-05-02 17:37:21,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901675048] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:21,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672827096] [2021-05-02 17:37:21,342 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:21,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 17:37:21,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:21,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:37:21,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:21,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:37:21,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:37:21,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:21,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:21,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:21,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:40 [2021-05-02 17:37:21,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:37:21,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:37:21,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:37:21,631 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:21,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-05-02 17:37:21,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:21,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:21,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:21,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:17 [2021-05-02 17:37:21,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,660 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:21,660 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:37:21,661 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:21,662 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:21,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:21,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:37:21,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:37:21,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672827096] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:21,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:21,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 24 [2021-05-02 17:37:21,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093826350] [2021-05-02 17:37:21,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 17:37:21,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:21,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 17:37:21,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-02 17:37:21,696 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:22,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:22,258 INFO L93 Difference]: Finished difference Result 102 states and 121 transitions. [2021-05-02 17:37:22,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 17:37:22,259 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2021-05-02 17:37:22,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:22,260 INFO L225 Difference]: With dead ends: 102 [2021-05-02 17:37:22,260 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 17:37:22,260 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 627.0ms TimeCoverageRelationStatistics Valid=233, Invalid=1327, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:37:22,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 17:37:22,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 69. [2021-05-02 17:37:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.1967213114754098) internal successors, (73), 62 states have internal predecessors, (73), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:37:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2021-05-02 17:37:22,263 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 33 [2021-05-02 17:37:22,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:22,263 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2021-05-02 17:37:22,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 21 states have internal predecessors, (41), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:22,263 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2021-05-02 17:37:22,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:37:22,264 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:22,264 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:22,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:22,483 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:22,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:22,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1543441284, now seen corresponding path program 2 times [2021-05-02 17:37:22,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:22,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823418076] [2021-05-02 17:37:22,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:22,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:22,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:22,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:22,551 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:37:22,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:22,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823418076] [2021-05-02 17:37:22,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823418076] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:22,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129119679] [2021-05-02 17:37:22,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:22,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:37:22,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:22,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 17:37:22,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:22,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:37:22,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129119679] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:22,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:22,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-02 17:37:22,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926501662] [2021-05-02 17:37:22,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:37:22,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:22,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:37:22,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:37:22,658 INFO L87 Difference]: Start difference. First operand 69 states and 80 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:22,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:22,821 INFO L93 Difference]: Finished difference Result 92 states and 110 transitions. [2021-05-02 17:37:22,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:37:22,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 17:37:22,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:22,822 INFO L225 Difference]: With dead ends: 92 [2021-05-02 17:37:22,822 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 17:37:22,822 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 72.7ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:37:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 17:37:22,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 72. [2021-05-02 17:37:22,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.203125) internal successors, (77), 65 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:37:22,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-05-02 17:37:22,825 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 36 [2021-05-02 17:37:22,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:22,825 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-05-02 17:37:22,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:22,825 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-05-02 17:37:22,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:37:22,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:22,826 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:23,042 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 17:37:23,042 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:23,043 INFO L82 PathProgramCache]: Analyzing trace with hash -954574653, now seen corresponding path program 1 times [2021-05-02 17:37:23,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:23,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172899877] [2021-05-02 17:37:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:23,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:23,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:23,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:37:23,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:23,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172899877] [2021-05-02 17:37:23,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172899877] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:23,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594497471] [2021-05-02 17:37:23,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:23,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 17:37:23,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:23,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:37:23,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-05-02 17:37:23,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:23,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:23,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:23,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-05-02 17:37:23,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:23,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:37:23,462 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:23,463 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:23,463 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:23,463 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:37:23,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:37:23,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1594497471] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:23,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:23,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15] total 21 [2021-05-02 17:37:23,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108661705] [2021-05-02 17:37:23,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 17:37:23,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:23,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 17:37:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-05-02 17:37:23,494 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 21 states, 20 states have (on average 2.25) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:24,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:24,253 INFO L93 Difference]: Finished difference Result 155 states and 187 transitions. [2021-05-02 17:37:24,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 17:37:24,254 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 17:37:24,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:24,255 INFO L225 Difference]: With dead ends: 155 [2021-05-02 17:37:24,255 INFO L226 Difference]: Without dead ends: 155 [2021-05-02 17:37:24,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 5 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 683.2ms TimeCoverageRelationStatistics Valid=424, Invalid=1928, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:37:24,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-05-02 17:37:24,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 83. [2021-05-02 17:37:24,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 76 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:37:24,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-05-02 17:37:24,259 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 36 [2021-05-02 17:37:24,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:24,259 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-05-02 17:37:24,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 2.25) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:24,259 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-05-02 17:37:24,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:37:24,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:24,260 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:24,475 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 17:37:24,475 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:24,476 INFO L82 PathProgramCache]: Analyzing trace with hash -392015670, now seen corresponding path program 3 times [2021-05-02 17:37:24,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:24,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428274941] [2021-05-02 17:37:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:24,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:24,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:24,838 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:37:24,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:24,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428274941] [2021-05-02 17:37:24,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428274941] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:24,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705471512] [2021-05-02 17:37:24,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:24,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:37:24,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:24,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:37:24,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:24,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,040 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-05-02 17:37:25,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-05-02 17:37:25,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:25,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:25,048 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:25,048 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:40 [2021-05-02 17:37:25,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,159 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-05-02 17:37:25,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 30 [2021-05-02 17:37:25,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:25,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:25,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:25,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:59, output treesize:32 [2021-05-02 17:37:25,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,314 INFO L354 Elim1Store]: treesize reduction 76, result has 22.4 percent of original size [2021-05-02 17:37:25,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 32 treesize of output 34 [2021-05-02 17:37:25,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:25,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:25,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:25,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:40, output treesize:27 [2021-05-02 17:37:25,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,421 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-05-02 17:37:25,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2021-05-02 17:37:25,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:25,427 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:25,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:25,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:3 [2021-05-02 17:37:25,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:25,479 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:37:25,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705471512] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:25,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:25,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 33 [2021-05-02 17:37:25,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255498598] [2021-05-02 17:37:25,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 17:37:25,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:25,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 17:37:25,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 17:37:25,481 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 33 states, 32 states have (on average 1.8125) internal successors, (58), 30 states have internal predecessors, (58), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:26,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:26,086 INFO L93 Difference]: Finished difference Result 107 states and 127 transitions. [2021-05-02 17:37:26,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 17:37:26,086 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 30 states have internal predecessors, (58), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 17:37:26,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:26,087 INFO L225 Difference]: With dead ends: 107 [2021-05-02 17:37:26,087 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 17:37:26,087 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 875.1ms TimeCoverageRelationStatistics Valid=228, Invalid=1664, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 17:37:26,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 17:37:26,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 83. [2021-05-02 17:37:26,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.2266666666666666) internal successors, (92), 76 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:37:26,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 99 transitions. [2021-05-02 17:37:26,091 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 99 transitions. Word has length 36 [2021-05-02 17:37:26,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:26,091 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 99 transitions. [2021-05-02 17:37:26,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 32 states have (on average 1.8125) internal successors, (58), 30 states have internal predecessors, (58), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:26,091 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 99 transitions. [2021-05-02 17:37:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 17:37:26,091 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:26,092 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:26,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 17:37:26,301 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:26,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1843314804, now seen corresponding path program 4 times [2021-05-02 17:37:26,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:26,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590671782] [2021-05-02 17:37:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:26,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:26,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:26,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:26,623 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:37:26,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:26,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590671782] [2021-05-02 17:37:26,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590671782] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:26,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354558667] [2021-05-02 17:37:26,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:26,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:37:26,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:26,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 17:37:26,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:26,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,791 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 17:37:26,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-05-02 17:37:26,793 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:26,798 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:26,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,799 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:26,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:41 [2021-05-02 17:37:26,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,945 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-05-02 17:37:26,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2021-05-02 17:37:26,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:26,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:26,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 17:37:26,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:60, output treesize:33 [2021-05-02 17:37:26,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:26,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,087 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,107 INFO L354 Elim1Store]: treesize reduction 78, result has 8.2 percent of original size [2021-05-02 17:37:27,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 38 treesize of output 16 [2021-05-02 17:37:27,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:27,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:27,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:27,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:49, output treesize:3 [2021-05-02 17:37:27,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,160 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-05-02 17:37:27,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354558667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:27,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:27,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 13] total 29 [2021-05-02 17:37:27,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526772244] [2021-05-02 17:37:27,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 17:37:27,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:27,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 17:37:27,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:37:27,162 INFO L87 Difference]: Start difference. First operand 83 states and 99 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:28,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:28,676 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2021-05-02 17:37:28,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 17:37:28,676 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-05-02 17:37:28,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:28,677 INFO L225 Difference]: With dead ends: 122 [2021-05-02 17:37:28,677 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 17:37:28,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1378.2ms TimeCoverageRelationStatistics Valid=516, Invalid=3644, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 17:37:28,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 17:37:28,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2021-05-02 17:37:28,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 70 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:37:28,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2021-05-02 17:37:28,681 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 39 [2021-05-02 17:37:28,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:28,681 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2021-05-02 17:37:28,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:37:28,681 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2021-05-02 17:37:28,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 17:37:28,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:28,681 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:28,897 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:28,897 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:28,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:28,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1268602014, now seen corresponding path program 2 times [2021-05-02 17:37:28,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:28,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149241763] [2021-05-02 17:37:28,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:29,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:29,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 17:37:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 2 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:29,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:29,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149241763] [2021-05-02 17:37:29,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149241763] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:29,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303881879] [2021-05-02 17:37:29,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:29,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:37:29,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:29,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 17:37:29,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:29,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-02 17:37:29,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:29,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:29,296 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:29,296 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:28, output treesize:7 [2021-05-02 17:37:29,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,353 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-05-02 17:37:29,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-05-02 17:37:29,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:29,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:29,359 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:29,359 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-05-02 17:37:29,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:31,390 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_1| Int) (|v_main_~#v~0.offset_BEFORE_CALL_1| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_1|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 4)) (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_1| 8))))) is different from true [2021-05-02 17:37:31,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:31,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:31,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:31,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:31,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:33,429 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 16 [2021-05-02 17:37:33,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:33,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:33,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:33,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:33,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,468 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 17 [2021-05-02 17:37:37,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,524 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-02 17:37:37,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2021-05-02 17:37:37,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:37,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:37:37,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:37,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-05-02 17:37:37,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:37,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:39,567 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 1 not checked. [2021-05-02 17:37:39,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303881879] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:39,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:39,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 25 [2021-05-02 17:37:39,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165251480] [2021-05-02 17:37:39,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:37:39,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:39,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:37:39,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=490, Unknown=3, NotChecked=44, Total=600 [2021-05-02 17:37:39,569 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 21 states have internal predecessors, (53), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:37:44,002 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 17:37:46,036 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 17:37:50,107 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-05-02 17:37:58,291 WARN L205 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-02 17:38:02,355 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-05-02 17:38:02,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:02,413 INFO L93 Difference]: Finished difference Result 117 states and 134 transitions. [2021-05-02 17:38:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 17:38:02,413 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 21 states have internal predecessors, (53), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2021-05-02 17:38:02,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:02,414 INFO L225 Difference]: With dead ends: 117 [2021-05-02 17:38:02,414 INFO L226 Difference]: Without dead ends: 117 [2021-05-02 17:38:02,415 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 40 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 30770.9ms TimeCoverageRelationStatistics Valid=199, Invalid=1440, Unknown=5, NotChecked=78, Total=1722 [2021-05-02 17:38:02,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-05-02 17:38:02,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 92. [2021-05-02 17:38:02,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 82 states have (on average 1.1829268292682926) internal successors, (97), 83 states have internal predecessors, (97), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:38:02,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 106 transitions. [2021-05-02 17:38:02,417 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 106 transitions. Word has length 41 [2021-05-02 17:38:02,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:02,417 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 106 transitions. [2021-05-02 17:38:02,417 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 21 states have internal predecessors, (53), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:38:02,417 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 106 transitions. [2021-05-02 17:38:02,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 17:38:02,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:02,418 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:02,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:02,625 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:02,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:02,625 INFO L82 PathProgramCache]: Analyzing trace with hash -993265584, now seen corresponding path program 2 times [2021-05-02 17:38:02,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:02,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422241113] [2021-05-02 17:38:02,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:02,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:02,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:02,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 17:38:02,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:02,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422241113] [2021-05-02 17:38:02,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422241113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:02,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829799467] [2021-05-02 17:38:02,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:02,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:38:02,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:02,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 17:38:02,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:02,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:02,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:02,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:02,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:02,952 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:02,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:02,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:38:02,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:02,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:02,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:02,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-05-02 17:38:03,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,045 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:03,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-05-02 17:38:03,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:03,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:03,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:03,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:20 [2021-05-02 17:38:03,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,120 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:03,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 43 [2021-05-02 17:38:03,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:03,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:03,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:38:03,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2021-05-02 17:38:03,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,172 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:03,220 INFO L354 Elim1Store]: treesize reduction 52, result has 49.5 percent of original size [2021-05-02 17:38:03,220 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 8 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 50 treesize of output 85 [2021-05-02 17:38:03,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:03,236 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:03,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:03,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:61, output treesize:17 [2021-05-02 17:38:03,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:03,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:38:03,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:03,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:03,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:03,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:38:03,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,360 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 1 proven. 29 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:38:03,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829799467] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:03,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:03,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 28 [2021-05-02 17:38:03,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875047470] [2021-05-02 17:38:03,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 17:38:03,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:03,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 17:38:03,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-05-02 17:38:03,361 INFO L87 Difference]: Start difference. First operand 92 states and 106 transitions. Second operand has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:04,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:04,845 INFO L93 Difference]: Finished difference Result 240 states and 282 transitions. [2021-05-02 17:38:04,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 17:38:04,846 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 17:38:04,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:04,847 INFO L225 Difference]: With dead ends: 240 [2021-05-02 17:38:04,847 INFO L226 Difference]: Without dead ends: 240 [2021-05-02 17:38:04,847 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 1199.1ms TimeCoverageRelationStatistics Valid=448, Invalid=3458, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 17:38:04,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-02 17:38:04,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 123. [2021-05-02 17:38:04,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 113 states have (on average 1.176991150442478) internal successors, (133), 114 states have internal predecessors, (133), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:38:04,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2021-05-02 17:38:04,852 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 42 [2021-05-02 17:38:04,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:04,852 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2021-05-02 17:38:04,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 27 states have (on average 2.5185185185185186) internal successors, (68), 26 states have internal predecessors, (68), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:04,852 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2021-05-02 17:38:04,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 17:38:04,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:04,853 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:05,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 17:38:05,068 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:05,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:05,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1684170134, now seen corresponding path program 1 times [2021-05-02 17:38:05,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:05,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299726576] [2021-05-02 17:38:05,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:05,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:05,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2021-05-02 17:38:05,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:05,284 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:05,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:05,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299726576] [2021-05-02 17:38:05,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299726576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:05,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744386406] [2021-05-02 17:38:05,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:05,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 17:38:05,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:05,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,391 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-05-02 17:38:05,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 24 [2021-05-02 17:38:05,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:05,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:05,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:05,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:30 [2021-05-02 17:38:05,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,503 INFO L354 Elim1Store]: treesize reduction 86, result has 9.5 percent of original size [2021-05-02 17:38:05,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 30 [2021-05-02 17:38:05,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:05,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:05,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:38:05,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:27 [2021-05-02 17:38:05,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,729 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-02 17:38:09,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 12 [2021-05-02 17:38:09,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:09,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:09,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:09,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:5 [2021-05-02 17:38:09,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:09,803 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:38:09,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744386406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:09,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:09,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 18] total 24 [2021-05-02 17:38:09,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680988655] [2021-05-02 17:38:09,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 17:38:09,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:09,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 17:38:09,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=491, Unknown=1, NotChecked=0, Total=552 [2021-05-02 17:38:09,805 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:38:46,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:46,938 INFO L93 Difference]: Finished difference Result 169 states and 192 transitions. [2021-05-02 17:38:46,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 17:38:46,939 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2021-05-02 17:38:46,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:46,939 INFO L225 Difference]: With dead ends: 169 [2021-05-02 17:38:46,939 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 17:38:46,940 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 37 SyntacticMatches, 7 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 4824.3ms TimeCoverageRelationStatistics Valid=169, Invalid=1312, Unknown=1, NotChecked=0, Total=1482 [2021-05-02 17:38:46,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 17:38:46,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 123. [2021-05-02 17:38:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 113 states have (on average 1.176991150442478) internal successors, (133), 114 states have internal predecessors, (133), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:38:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 142 transitions. [2021-05-02 17:38:46,942 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 142 transitions. Word has length 44 [2021-05-02 17:38:46,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:46,942 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 142 transitions. [2021-05-02 17:38:46,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 2.347826086956522) internal successors, (54), 20 states have internal predecessors, (54), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:38:46,943 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 142 transitions. [2021-05-02 17:38:46,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 17:38:46,943 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:46,943 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:47,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:47,153 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:47,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1847837720, now seen corresponding path program 3 times [2021-05-02 17:38:47,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:47,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091974267] [2021-05-02 17:38:47,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:47,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:47,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:47,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:47,615 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:47,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091974267] [2021-05-02 17:38:47,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091974267] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:47,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900447231] [2021-05-02 17:38:47,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:47,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 17:38:47,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:47,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 17:38:47,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:47,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,862 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:47,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-05-02 17:38:47,864 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:47,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:47,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:47,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-05-02 17:38:47,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:47,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:47,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:47,983 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:47,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-05-02 17:38:47,984 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:47,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:47,991 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:47,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2021-05-02 17:38:48,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:48,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:48,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:48,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:38:48,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:48,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:48,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:48,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:38:48,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:48,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:38:48,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900447231] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:48,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:48,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 30 [2021-05-02 17:38:48,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249705978] [2021-05-02 17:38:48,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 17:38:48,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 17:38:48,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=746, Unknown=0, NotChecked=0, Total=870 [2021-05-02 17:38:48,060 INFO L87 Difference]: Start difference. First operand 123 states and 142 transitions. Second operand has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:49,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:49,389 INFO L93 Difference]: Finished difference Result 227 states and 268 transitions. [2021-05-02 17:38:49,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 17:38:49,390 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 17:38:49,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:49,391 INFO L225 Difference]: With dead ends: 227 [2021-05-02 17:38:49,391 INFO L226 Difference]: Without dead ends: 227 [2021-05-02 17:38:49,391 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 6 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 828 ImplicationChecksByTransitivity, 1230.4ms TimeCoverageRelationStatistics Valid=360, Invalid=2610, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 17:38:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-05-02 17:38:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 132. [2021-05-02 17:38:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 122 states have (on average 1.1885245901639345) internal successors, (145), 123 states have internal predecessors, (145), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:38:49,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 154 transitions. [2021-05-02 17:38:49,395 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 154 transitions. Word has length 44 [2021-05-02 17:38:49,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:49,395 INFO L480 AbstractCegarLoop]: Abstraction has 132 states and 154 transitions. [2021-05-02 17:38:49,395 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 27 states have internal predecessors, (59), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 154 transitions. [2021-05-02 17:38:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 17:38:49,395 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:49,396 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:38:49,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-05-02 17:38:49,611 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:49,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:49,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1977787681, now seen corresponding path program 5 times [2021-05-02 17:38:49,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:49,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847504213] [2021-05-02 17:38:49,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:50,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:50,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:50,064 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 1 proven. 41 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:38:50,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:50,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847504213] [2021-05-02 17:38:50,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847504213] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:50,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120913910] [2021-05-02 17:38:50,065 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:50,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-02 17:38:50,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 17:38:50,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:50,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,291 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:50,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 27 [2021-05-02 17:38:50,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:50,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:50,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:50,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:48, output treesize:44 [2021-05-02 17:38:50,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:50,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:50,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 30 [2021-05-02 17:38:50,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:50,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:50,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:50,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:58, output treesize:30 [2021-05-02 17:38:50,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:50,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:50,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:50,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:50,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-05-02 17:38:50,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:50,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:50,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:50,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2021-05-02 17:38:50,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:50,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:50,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:50,555 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:50,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-05-02 17:38:50,556 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:50,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:50,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:50,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:38, output treesize:19 [2021-05-02 17:38:50,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:50,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-05-02 17:38:50,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:50,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:50,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:50,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-05-02 17:38:50,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:38:50,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120913910] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:50,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:50,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-05-02 17:38:50,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935072222] [2021-05-02 17:38:50,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 17:38:50,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:50,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 17:38:50,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:38:50,632 INFO L87 Difference]: Start difference. First operand 132 states and 154 transitions. Second operand has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:51,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:38:51,865 INFO L93 Difference]: Finished difference Result 212 states and 249 transitions. [2021-05-02 17:38:51,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 17:38:51,866 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 17:38:51,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:38:51,867 INFO L225 Difference]: With dead ends: 212 [2021-05-02 17:38:51,867 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 17:38:51,868 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1288.9ms TimeCoverageRelationStatistics Valid=377, Invalid=2815, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 17:38:51,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 17:38:51,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 123. [2021-05-02 17:38:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 113 states have (on average 1.1858407079646018) internal successors, (134), 114 states have internal predecessors, (134), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:38:51,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2021-05-02 17:38:51,872 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 44 [2021-05-02 17:38:51,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:38:51,873 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2021-05-02 17:38:51,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 30 states have (on average 2.033333333333333) internal successors, (61), 28 states have internal predecessors, (61), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:38:51,873 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2021-05-02 17:38:51,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 17:38:51,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:38:51,873 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2021-05-02 17:38:52,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:52,089 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:38:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:38:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1361153185, now seen corresponding path program 1 times [2021-05-02 17:38:52,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:38:52,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872185462] [2021-05-02 17:38:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:38:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:52,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:38:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:52,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-05-02 17:38:52,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:52,809 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:52,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:52,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872185462] [2021-05-02 17:38:52,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872185462] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:52,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775062038] [2021-05-02 17:38:52,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:38:52,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:38:52,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 42 conjunts are in the unsatisfiable core [2021-05-02 17:38:52,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:52,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:52,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:53,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:38:53,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:53,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:53,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:38:53,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:47, output treesize:40 [2021-05-02 17:38:53,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:53,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:53,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:53,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:53,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 29 [2021-05-02 17:38:53,134 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:53,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:53,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:53,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2021-05-02 17:38:53,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:53,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:53,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:53,230 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-05-02 17:38:53,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 39 [2021-05-02 17:38:53,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:53,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:53,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:53,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:30 [2021-05-02 17:38:53,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:53,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:53,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:53,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:53,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:38:53,404 INFO L354 Elim1Store]: treesize reduction 50, result has 28.6 percent of original size [2021-05-02 17:38:53,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 43 treesize of output 56 [2021-05-02 17:38:53,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:53,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:38:53,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,423 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:53,423 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:19 [2021-05-02 17:38:53,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:53,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:01,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:39:01,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:39:01,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:39:01,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:39:01,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:39:01,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:01,690 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:39:01,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775062038] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:01,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:01,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 41 [2021-05-02 17:39:01,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018282042] [2021-05-02 17:39:01,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 17:39:01,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:01,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 17:39:01,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=1444, Unknown=1, NotChecked=0, Total=1640 [2021-05-02 17:39:01,692 INFO L87 Difference]: Start difference. First operand 123 states and 143 transitions. Second operand has 41 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:40:10,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:40:10,451 INFO L93 Difference]: Finished difference Result 269 states and 311 transitions. [2021-05-02 17:40:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 17:40:10,451 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2021-05-02 17:40:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:40:10,452 INFO L225 Difference]: With dead ends: 269 [2021-05-02 17:40:10,453 INFO L226 Difference]: Without dead ends: 269 [2021-05-02 17:40:10,454 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 30697.4ms TimeCoverageRelationStatistics Valid=732, Invalid=6229, Unknown=11, NotChecked=0, Total=6972 [2021-05-02 17:40:10,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-05-02 17:40:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 191. [2021-05-02 17:40:10,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 174 states have (on average 1.1781609195402298) internal successors, (205), 177 states have internal predecessors, (205), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:40:10,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 222 transitions. [2021-05-02 17:40:10,459 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 222 transitions. Word has length 47 [2021-05-02 17:40:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:40:10,459 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 222 transitions. [2021-05-02 17:40:10,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 40 states have (on average 1.675) internal successors, (67), 37 states have internal predecessors, (67), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:40:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 222 transitions. [2021-05-02 17:40:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 17:40:10,460 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:40:10,460 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:40:10,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-05-02 17:40:10,678 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:40:10,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:40:10,678 INFO L82 PathProgramCache]: Analyzing trace with hash 910513777, now seen corresponding path program 3 times [2021-05-02 17:40:10,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:40:10,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693346422] [2021-05-02 17:40:10,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:40:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:10,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:40:10,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:10,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-05-02 17:40:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:10,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 17:40:10,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 17:40:10,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:40:10,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693346422] [2021-05-02 17:40:10,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693346422] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:10,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882140795] [2021-05-02 17:40:10,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:40:10,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 17:40:10,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:40:10,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:40:10,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:40:11,008 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:11,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:11,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:11,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:11,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:11,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:11,091 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 17:40:11,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882140795] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:11,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:40:11,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 13 [2021-05-02 17:40:11,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996240151] [2021-05-02 17:40:11,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 17:40:11,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:40:11,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 17:40:11,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:40:11,094 INFO L87 Difference]: Start difference. First operand 191 states and 222 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:40:11,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:40:11,362 INFO L93 Difference]: Finished difference Result 257 states and 301 transitions. [2021-05-02 17:40:11,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 17:40:11,363 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 49 [2021-05-02 17:40:11,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:40:11,364 INFO L225 Difference]: With dead ends: 257 [2021-05-02 17:40:11,364 INFO L226 Difference]: Without dead ends: 215 [2021-05-02 17:40:11,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 200.0ms TimeCoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-05-02 17:40:11,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-05-02 17:40:11,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 178. [2021-05-02 17:40:11,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 161 states have (on average 1.1490683229813665) internal successors, (185), 165 states have internal predecessors, (185), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 5 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:40:11,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 203 transitions. [2021-05-02 17:40:11,369 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 203 transitions. Word has length 49 [2021-05-02 17:40:11,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:40:11,369 INFO L480 AbstractCegarLoop]: Abstraction has 178 states and 203 transitions. [2021-05-02 17:40:11,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:40:11,370 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 203 transitions. [2021-05-02 17:40:11,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 17:40:11,370 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:40:11,370 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:40:11,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-02 17:40:11,581 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:40:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:40:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash 405243164, now seen corresponding path program 4 times [2021-05-02 17:40:11,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:40:11,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819480747] [2021-05-02 17:40:11,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:40:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:11,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:40:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:11,888 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 7 proven. 47 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:40:11,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:40:11,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819480747] [2021-05-02 17:40:11,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819480747] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:11,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616819667] [2021-05-02 17:40:11,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:40:11,941 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:40:11,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:40:11,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 17:40:11,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:40:11,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:11,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:11,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-05-02 17:40:12,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:12,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:12,009 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:12,009 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:10 [2021-05-02 17:40:12,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-05-02 17:40:12,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:12,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:12,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:12,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:31, output treesize:10 [2021-05-02 17:40:12,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:12,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 25 [2021-05-02 17:40:12,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:12,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:12,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:12,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:28 [2021-05-02 17:40:12,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:12,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:12,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:12,142 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:12,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 40 [2021-05-02 17:40:12,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:12,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:12,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:12,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:28 [2021-05-02 17:40:12,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:12,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:12,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:12,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:12,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 42 [2021-05-02 17:40:12,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:12,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:12,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:40:12,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:58, output treesize:30 [2021-05-02 17:40:12,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,401 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:12,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:40:12,403 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:12,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:12,405 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:12,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:40:12,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 9 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:40:12,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616819667] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:12,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:40:12,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 29 [2021-05-02 17:40:12,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497006572] [2021-05-02 17:40:12,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 17:40:12,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:40:12,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 17:40:12,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:40:12,447 INFO L87 Difference]: Start difference. First operand 178 states and 203 transitions. Second operand has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 26 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:40:13,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:40:13,948 INFO L93 Difference]: Finished difference Result 292 states and 349 transitions. [2021-05-02 17:40:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 17:40:13,949 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 26 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 17:40:13,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:40:13,950 INFO L225 Difference]: With dead ends: 292 [2021-05-02 17:40:13,950 INFO L226 Difference]: Without dead ends: 292 [2021-05-02 17:40:13,951 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1454 ImplicationChecksByTransitivity, 1475.8ms TimeCoverageRelationStatistics Valid=849, Invalid=3981, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 17:40:13,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-02 17:40:13,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 212. [2021-05-02 17:40:13,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 193 states have (on average 1.1761658031088082) internal successors, (227), 198 states have internal predecessors, (227), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:40:13,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 247 transitions. [2021-05-02 17:40:13,958 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 247 transitions. Word has length 47 [2021-05-02 17:40:13,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:40:13,958 INFO L480 AbstractCegarLoop]: Abstraction has 212 states and 247 transitions. [2021-05-02 17:40:13,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 26 states have internal predecessors, (65), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:40:13,958 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 247 transitions. [2021-05-02 17:40:13,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 17:40:13,959 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:40:13,959 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:40:14,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-05-02 17:40:14,178 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:40:14,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:40:14,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1046340950, now seen corresponding path program 5 times [2021-05-02 17:40:14,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:40:14,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346051868] [2021-05-02 17:40:14,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:40:14,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:14,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:40:14,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:40:14,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:40:14,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346051868] [2021-05-02 17:40:14,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346051868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:14,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818659868] [2021-05-02 17:40:14,825 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:40:15,097 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 17:40:15,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:40:15,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 38 conjunts are in the unsatisfiable core [2021-05-02 17:40:15,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:40:15,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,171 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,356 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-02 17:40:15,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:15,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:15,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:15,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:35 [2021-05-02 17:40:15,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 62 [2021-05-02 17:40:15,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-05-02 17:40:15,453 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:15,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:15,459 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:15,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:15,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:15,473 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:88, output treesize:50 [2021-05-02 17:40:15,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:40:15,548 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:15,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 49 [2021-05-02 17:40:15,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:15,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:15,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,562 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:40:15,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:66, output treesize:29 [2021-05-02 17:40:15,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,676 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:15,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:40:15,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:15,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:15,693 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:15,693 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:40:15,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:15,730 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:40:15,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818659868] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:15,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:40:15,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 29 [2021-05-02 17:40:15,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161946911] [2021-05-02 17:40:15,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 17:40:15,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:40:15,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 17:40:15,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-05-02 17:40:15,732 INFO L87 Difference]: Start difference. First operand 212 states and 247 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:40:17,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:40:17,010 INFO L93 Difference]: Finished difference Result 261 states and 305 transitions. [2021-05-02 17:40:17,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 17:40:17,011 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 17:40:17,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:40:17,012 INFO L225 Difference]: With dead ends: 261 [2021-05-02 17:40:17,012 INFO L226 Difference]: Without dead ends: 261 [2021-05-02 17:40:17,013 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 34 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1500.6ms TimeCoverageRelationStatistics Valid=284, Invalid=2068, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:40:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-05-02 17:40:17,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 217. [2021-05-02 17:40:17,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 198 states have (on average 1.1767676767676767) internal successors, (233), 203 states have internal predecessors, (233), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (9), 5 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:40:17,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 253 transitions. [2021-05-02 17:40:17,019 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 253 transitions. Word has length 47 [2021-05-02 17:40:17,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:40:17,019 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 253 transitions. [2021-05-02 17:40:17,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 26 states have internal predecessors, (62), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:40:17,019 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 253 transitions. [2021-05-02 17:40:17,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 17:40:17,020 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:40:17,020 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:40:17,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-05-02 17:40:17,221 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:40:17,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:40:17,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1608899933, now seen corresponding path program 6 times [2021-05-02 17:40:17,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:40:17,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075339248] [2021-05-02 17:40:17,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:40:17,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:17,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:40:17,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:17,747 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 51 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:40:17,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:40:17,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075339248] [2021-05-02 17:40:17,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075339248] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:17,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930348143] [2021-05-02 17:40:17,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:40:18,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 17:40:18,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:40:18,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 17:40:18,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:40:18,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,416 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-05-02 17:40:18,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-05-02 17:40:18,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:18,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:18,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:18,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2021-05-02 17:40:18,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,487 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-05-02 17:40:18,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 31 [2021-05-02 17:40:18,489 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:18,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:18,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:18,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:25 [2021-05-02 17:40:18,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,604 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-05-02 17:40:18,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 32 [2021-05-02 17:40:18,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:18,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:18,612 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:18,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:33, output treesize:13 [2021-05-02 17:40:18,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,670 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-02 17:40:18,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 10 [2021-05-02 17:40:18,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:18,673 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:18,673 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:18,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:30, output treesize:3 [2021-05-02 17:40:18,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:18,729 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:40:18,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930348143] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:18,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:40:18,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 16] total 37 [2021-05-02 17:40:18,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220631960] [2021-05-02 17:40:18,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 17:40:18,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:40:18,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 17:40:18,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1207, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 17:40:18,731 INFO L87 Difference]: Start difference. First operand 217 states and 253 transitions. Second operand has 37 states, 36 states have (on average 2.111111111111111) internal successors, (76), 34 states have internal predecessors, (76), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:40:20,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:40:20,424 INFO L93 Difference]: Finished difference Result 267 states and 310 transitions. [2021-05-02 17:40:20,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 17:40:20,425 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.111111111111111) internal successors, (76), 34 states have internal predecessors, (76), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 17:40:20,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:40:20,426 INFO L225 Difference]: With dead ends: 267 [2021-05-02 17:40:20,426 INFO L226 Difference]: Without dead ends: 267 [2021-05-02 17:40:20,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1678.9ms TimeCoverageRelationStatistics Valid=495, Invalid=3795, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 17:40:20,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-05-02 17:40:20,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 173. [2021-05-02 17:40:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 160 states have (on average 1.16875) internal successors, (187), 162 states have internal predecessors, (187), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 17:40:20,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 199 transitions. [2021-05-02 17:40:20,434 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 199 transitions. Word has length 47 [2021-05-02 17:40:20,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:40:20,434 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 199 transitions. [2021-05-02 17:40:20,434 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 36 states have (on average 2.111111111111111) internal successors, (76), 34 states have internal predecessors, (76), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:40:20,434 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 199 transitions. [2021-05-02 17:40:20,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 17:40:20,434 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:40:20,435 INFO L523 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 3, 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] [2021-05-02 17:40:20,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:40:20,645 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:40:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:40:20,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1876347422, now seen corresponding path program 2 times [2021-05-02 17:40:20,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:40:20,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081138410] [2021-05-02 17:40:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:40:20,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:21,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:40:21,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:21,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2021-05-02 17:40:21,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:40:21,345 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:40:21,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:40:21,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081138410] [2021-05-02 17:40:21,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081138410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:21,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930618021] [2021-05-02 17:40:21,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:40:21,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:40:21,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:40:21,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 17:40:21,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:40:21,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,534 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-05-02 17:40:21,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-05-02 17:40:21,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:21,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:21,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:21,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-02 17:40:21,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,686 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-05-02 17:40:21,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 30 [2021-05-02 17:40:21,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:21,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:21,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:40:21,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:32 [2021-05-02 17:40:21,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,892 INFO L354 Elim1Store]: treesize reduction 76, result has 22.4 percent of original size [2021-05-02 17:40:21,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 34 [2021-05-02 17:40:21,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:21,903 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:21,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:40:21,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:45 [2021-05-02 17:40:21,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:21,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,160 INFO L354 Elim1Store]: treesize reduction 248, result has 8.8 percent of original size [2021-05-02 17:40:22,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 42 [2021-05-02 17:40:22,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:22,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:22,174 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:40:22,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:44 [2021-05-02 17:40:22,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,347 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,474 INFO L354 Elim1Store]: treesize reduction 144, result has 24.2 percent of original size [2021-05-02 17:40:22,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 54 treesize of output 64 [2021-05-02 17:40:22,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:22,491 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:22,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,500 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:40:22,500 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:63, output treesize:25 [2021-05-02 17:40:22,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:22,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:43,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,114 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-05-02 17:40:45,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 13 [2021-05-02 17:40:45,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:40:45,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:40:45,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:40:45,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:3 [2021-05-02 17:40:45,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:40:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:40:45,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930618021] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:40:45,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:40:45,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-05-02 17:40:45,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276066496] [2021-05-02 17:40:45,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 17:40:45,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:40:45,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 17:40:45,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2346, Unknown=9, NotChecked=0, Total=2550 [2021-05-02 17:40:45,236 INFO L87 Difference]: Start difference. First operand 173 states and 199 transitions. Second operand has 51 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 47 states have internal predecessors, (82), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:41:36,254 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 17:41:42,465 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 55 [2021-05-02 17:41:44,951 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 51 [2021-05-02 17:42:43,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:42:43,672 INFO L93 Difference]: Finished difference Result 258 states and 300 transitions. [2021-05-02 17:42:43,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 17:42:43,673 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 47 states have internal predecessors, (82), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 50 [2021-05-02 17:42:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:42:43,674 INFO L225 Difference]: With dead ends: 258 [2021-05-02 17:42:43,674 INFO L226 Difference]: Without dead ends: 224 [2021-05-02 17:42:43,675 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2544 ImplicationChecksByTransitivity, 53371.7ms TimeCoverageRelationStatistics Valid=689, Invalid=6775, Unknown=18, NotChecked=0, Total=7482 [2021-05-02 17:42:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-02 17:42:43,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 151. [2021-05-02 17:42:43,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 141 states have (on average 1.2056737588652482) internal successors, (170), 142 states have internal predecessors, (170), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:42:43,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 179 transitions. [2021-05-02 17:42:43,680 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 179 transitions. Word has length 50 [2021-05-02 17:42:43,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:42:43,680 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 179 transitions. [2021-05-02 17:42:43,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 47 states have internal predecessors, (82), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:42:43,680 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 179 transitions. [2021-05-02 17:42:43,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 17:42:43,681 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:42:43,681 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:42:43,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:42:43,897 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:42:43,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:42:43,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1204484069, now seen corresponding path program 2 times [2021-05-02 17:42:43,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:42:43,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535825291] [2021-05-02 17:42:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:42:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:42:44,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:42:44,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:42:44,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 17:42:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:42:44,180 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:42:44,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:42:44,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535825291] [2021-05-02 17:42:44,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535825291] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:42:44,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229704989] [2021-05-02 17:42:44,180 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:42:44,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:42:44,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:42:44,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 17:42:44,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:42:44,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:44,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:44,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:44,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:44,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:44,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:44,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:44,406 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-05-02 17:42:44,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 22 [2021-05-02 17:42:44,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:42:44,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:42:44,414 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:42:44,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:15 [2021-05-02 17:42:44,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:44,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:44,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:44,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:44,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:46,454 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_main_~#v~0.base_BEFORE_CALL_5| Int) (|v_main_~#v~0.offset_BEFORE_CALL_5| Int)) (let ((.cse0 (select |c_#memory_int| |v_main_~#v~0.base_BEFORE_CALL_5|))) (<= (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_5| 4)) (select .cse0 (+ |v_main_~#v~0.offset_BEFORE_CALL_5| 8))))) is different from true [2021-05-02 17:42:46,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:46,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:46,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:46,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:46,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:48,509 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 16 [2021-05-02 17:42:48,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:48,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:48,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:48,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:48,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,564 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 17 [2021-05-02 17:42:52,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,637 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-05-02 17:42:52,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2021-05-02 17:42:52,640 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:42:52,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:42:52,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:42:52,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:34, output treesize:3 [2021-05-02 17:42:52,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:52,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:42:54,692 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 16 trivial. 1 not checked. [2021-05-02 17:42:54,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229704989] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:42:54,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:42:54,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 25 [2021-05-02 17:42:54,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784802436] [2021-05-02 17:42:54,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:42:54,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:42:54,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:42:54,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=494, Unknown=3, NotChecked=44, Total=600 [2021-05-02 17:42:54,694 INFO L87 Difference]: Start difference. First operand 151 states and 179 transitions. Second operand has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 21 states have internal predecessors, (59), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:42:59,827 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 17:43:01,929 WARN L205 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 17:43:06,056 WARN L205 SmtUtils]: Spent 4.07 s on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-05-02 17:43:14,371 WARN L205 SmtUtils]: Spent 4.05 s on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-05-02 17:43:18,454 WARN L205 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-05-02 17:43:18,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:43:18,663 INFO L93 Difference]: Finished difference Result 265 states and 315 transitions. [2021-05-02 17:43:18,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 17:43:18,663 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 21 states have internal predecessors, (59), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2021-05-02 17:43:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:43:18,665 INFO L225 Difference]: With dead ends: 265 [2021-05-02 17:43:18,665 INFO L226 Difference]: Without dead ends: 265 [2021-05-02 17:43:18,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 44 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 31363.2ms TimeCoverageRelationStatistics Valid=308, Invalid=2771, Unknown=5, NotChecked=108, Total=3192 [2021-05-02 17:43:18,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-05-02 17:43:18,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 155. [2021-05-02 17:43:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 145 states have (on average 1.2137931034482758) internal successors, (176), 146 states have internal predecessors, (176), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:43:18,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2021-05-02 17:43:18,669 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 52 [2021-05-02 17:43:18,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:43:18,669 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2021-05-02 17:43:18,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.4583333333333335) internal successors, (59), 21 states have internal predecessors, (59), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:43:18,669 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2021-05-02 17:43:18,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 17:43:18,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:43:18,669 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:43:18,877 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-05-02 17:43:18,877 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:43:18,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:43:18,878 INFO L82 PathProgramCache]: Analyzing trace with hash -947278869, now seen corresponding path program 3 times [2021-05-02 17:43:18,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:43:18,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908655370] [2021-05-02 17:43:18,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:43:18,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:19,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:43:19,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:19,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 17:43:19,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:19,614 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:43:19,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:43:19,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908655370] [2021-05-02 17:43:19,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908655370] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:43:19,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083648106] [2021-05-02 17:43:19,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:43:19,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 17:43:19,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:43:19,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 17:43:19,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:43:19,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:19,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:19,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:19,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:19,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:19,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:19,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 28 [2021-05-02 17:43:19,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:19,996 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:19,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:43:19,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:48 [2021-05-02 17:43:20,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:20,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:20,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 31 [2021-05-02 17:43:20,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:20,254 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:20,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:43:20,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:36 [2021-05-02 17:43:20,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,555 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:20,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:20,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:20,579 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:20,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 38 [2021-05-02 17:43:20,581 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:20,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:20,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:43:20,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:29 [2021-05-02 17:43:20,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,987 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:20,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-05-02 17:43:20,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:20,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:20,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:43:20,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-05-02 17:43:20,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:20,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:21,050 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 32 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:43:21,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083648106] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:43:21,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:43:21,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 36 [2021-05-02 17:43:21,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322733569] [2021-05-02 17:43:21,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 17:43:21,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:43:21,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 17:43:21,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:43:21,052 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 32 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:43:23,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:43:23,819 INFO L93 Difference]: Finished difference Result 214 states and 249 transitions. [2021-05-02 17:43:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 17:43:23,820 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 32 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2021-05-02 17:43:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:43:23,821 INFO L225 Difference]: With dead ends: 214 [2021-05-02 17:43:23,821 INFO L226 Difference]: Without dead ends: 214 [2021-05-02 17:43:23,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 2957.1ms TimeCoverageRelationStatistics Valid=433, Invalid=3349, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 17:43:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-02 17:43:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 155. [2021-05-02 17:43:23,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 145 states have (on average 1.2137931034482758) internal successors, (176), 146 states have internal predecessors, (176), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:43:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 185 transitions. [2021-05-02 17:43:23,825 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 185 transitions. Word has length 52 [2021-05-02 17:43:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:43:23,825 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 185 transitions. [2021-05-02 17:43:23,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 2.057142857142857) internal successors, (72), 32 states have internal predecessors, (72), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:43:23,826 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 185 transitions. [2021-05-02 17:43:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-05-02 17:43:23,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:43:23,826 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:43:24,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:43:24,030 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:43:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:43:24,030 INFO L82 PathProgramCache]: Analyzing trace with hash 672947631, now seen corresponding path program 6 times [2021-05-02 17:43:24,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:43:24,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718732406] [2021-05-02 17:43:24,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:43:24,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:24,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:43:24,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 37 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:43:24,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:43:24,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718732406] [2021-05-02 17:43:24,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718732406] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:43:24,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309896090] [2021-05-02 17:43:24,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:43:24,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 17:43:24,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:43:24,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjunts are in the unsatisfiable core [2021-05-02 17:43:24,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:43:24,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:43:24,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:24,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:24,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:43:24,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:27 [2021-05-02 17:43:24,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,721 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,730 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:24,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 39 [2021-05-02 17:43:24,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:24,740 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:24,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:43:24,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:28 [2021-05-02 17:43:24,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:24,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 31 [2021-05-02 17:43:24,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:24,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:24,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:43:24,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:20 [2021-05-02 17:43:24,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,904 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:24,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 38 [2021-05-02 17:43:24,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:24,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:24,920 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:43:24,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:35 [2021-05-02 17:43:24,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:24,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,967 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:43:24,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:24,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:24,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 54 treesize of output 65 [2021-05-02 17:43:24,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:24,995 INFO L628 ElimStorePlain]: treesize reduction 18, result has 69.5 percent of original size [2021-05-02 17:43:24,996 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:43:24,996 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:60, output treesize:41 [2021-05-02 17:43:25,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:25,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:25,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:25,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:25,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:25,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:25,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:25,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:25,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:25,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:25,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:25,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:25,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 42 treesize of output 41 [2021-05-02 17:43:25,099 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:25,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:25,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:43:25,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:17 [2021-05-02 17:43:25,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:25,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:25,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:25,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:43:25,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:25,185 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:25,186 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:43:25,186 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:43:25,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:25,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:25,269 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:43:25,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309896090] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:43:25,269 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:43:25,270 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 24] total 35 [2021-05-02 17:43:25,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307776213] [2021-05-02 17:43:25,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:43:25,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:43:25,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:43:25,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1068, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:43:25,271 INFO L87 Difference]: Start difference. First operand 155 states and 185 transitions. Second operand has 35 states, 34 states have (on average 2.676470588235294) internal successors, (91), 33 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:43:27,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:43:27,533 INFO L93 Difference]: Finished difference Result 439 states and 529 transitions. [2021-05-02 17:43:27,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 17:43:27,534 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.676470588235294) internal successors, (91), 33 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-05-02 17:43:27,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:43:27,535 INFO L225 Difference]: With dead ends: 439 [2021-05-02 17:43:27,535 INFO L226 Difference]: Without dead ends: 439 [2021-05-02 17:43:27,536 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 1867.0ms TimeCoverageRelationStatistics Valid=487, Invalid=4483, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 17:43:27,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-05-02 17:43:27,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 253. [2021-05-02 17:43:27,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 243 states have (on average 1.2181069958847737) internal successors, (296), 244 states have internal predecessors, (296), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:43:27,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 305 transitions. [2021-05-02 17:43:27,541 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 305 transitions. Word has length 53 [2021-05-02 17:43:27,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:43:27,541 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 305 transitions. [2021-05-02 17:43:27,542 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 2.676470588235294) internal successors, (91), 33 states have internal predecessors, (91), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:43:27,542 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 305 transitions. [2021-05-02 17:43:27,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 17:43:27,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:43:27,542 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:43:27,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-05-02 17:43:27,753 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:43:27,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:43:27,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1962445488, now seen corresponding path program 3 times [2021-05-02 17:43:27,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:43:27,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914249355] [2021-05-02 17:43:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:43:27,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:27,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:43:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:27,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-02 17:43:27,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-05-02 17:43:27,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:43:27,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914249355] [2021-05-02 17:43:27,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914249355] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:43:27,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365608491] [2021-05-02 17:43:27,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:43:27,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-02 17:43:27,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:43:27,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 17:43:27,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:43:28,271 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 17:43:28,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365608491] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:43:28,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:43:28,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 22 [2021-05-02 17:43:28,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572329427] [2021-05-02 17:43:28,293 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 17:43:28,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:43:28,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 17:43:28,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:43:28,294 INFO L87 Difference]: Start difference. First operand 253 states and 305 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:43:29,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:43:29,773 INFO L93 Difference]: Finished difference Result 334 states and 401 transitions. [2021-05-02 17:43:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 17:43:29,774 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2021-05-02 17:43:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:43:29,775 INFO L225 Difference]: With dead ends: 334 [2021-05-02 17:43:29,776 INFO L226 Difference]: Without dead ends: 334 [2021-05-02 17:43:29,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 994.6ms TimeCoverageRelationStatistics Valid=360, Invalid=1992, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 17:43:29,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2021-05-02 17:43:29,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 242. [2021-05-02 17:43:29,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 232 states have (on average 1.2112068965517242) internal successors, (281), 233 states have internal predecessors, (281), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:43:29,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 290 transitions. [2021-05-02 17:43:29,782 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 290 transitions. Word has length 55 [2021-05-02 17:43:29,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:43:29,782 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 290 transitions. [2021-05-02 17:43:29,782 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:43:29,782 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 290 transitions. [2021-05-02 17:43:29,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 17:43:29,783 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:43:29,783 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:43:30,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:43:30,001 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:43:30,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:43:30,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1488049937, now seen corresponding path program 4 times [2021-05-02 17:43:30,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:43:30,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054408582] [2021-05-02 17:43:30,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:43:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:30,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:43:30,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:30,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2021-05-02 17:43:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:30,336 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:43:30,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:43:30,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054408582] [2021-05-02 17:43:30,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054408582] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:43:30,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589572606] [2021-05-02 17:43:30,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:43:30,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:43:30,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:43:30,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 17:43:30,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:43:30,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:30,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:30,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:43:30,681 INFO L354 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2021-05-02 17:43:30,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 38 [2021-05-02 17:43:30,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:30,696 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:30,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:43:30,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:43 [2021-05-02 17:43:30,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,701 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:30,995 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:43:30,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:30,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:43:31,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:31,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 48 treesize of output 56 [2021-05-02 17:43:31,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:31,030 INFO L628 ElimStorePlain]: treesize reduction 22, result has 63.9 percent of original size [2021-05-02 17:43:31,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,037 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,038 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 17:43:31,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:62, output treesize:36 [2021-05-02 17:43:31,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,042 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,250 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:31,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:31,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:43:31,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:43:31,885 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:31,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 34 treesize of output 16 [2021-05-02 17:43:31,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:31,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:31,899 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:43:31,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:3 [2021-05-02 17:43:31,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:31,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:43:32,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589572606] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:43:32,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:43:32,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-05-02 17:43:32,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164018193] [2021-05-02 17:43:32,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 17:43:32,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:43:32,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 17:43:32,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1146, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 17:43:32,026 INFO L87 Difference]: Start difference. First operand 242 states and 290 transitions. Second operand has 36 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 32 states have internal predecessors, (90), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:43:37,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:43:37,660 INFO L93 Difference]: Finished difference Result 372 states and 439 transitions. [2021-05-02 17:43:37,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 17:43:37,660 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 32 states have internal predecessors, (90), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 55 [2021-05-02 17:43:37,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:43:37,661 INFO L225 Difference]: With dead ends: 372 [2021-05-02 17:43:37,661 INFO L226 Difference]: Without dead ends: 372 [2021-05-02 17:43:37,663 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 43 SyntacticMatches, 3 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 4363.6ms TimeCoverageRelationStatistics Valid=712, Invalid=6944, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 17:43:37,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-05-02 17:43:37,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 242. [2021-05-02 17:43:37,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 232 states have (on average 1.2112068965517242) internal successors, (281), 233 states have internal predecessors, (281), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:43:37,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 290 transitions. [2021-05-02 17:43:37,669 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 290 transitions. Word has length 55 [2021-05-02 17:43:37,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:43:37,670 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 290 transitions. [2021-05-02 17:43:37,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 34 states have (on average 2.6470588235294117) internal successors, (90), 32 states have internal predecessors, (90), 5 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:43:37,670 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 290 transitions. [2021-05-02 17:43:37,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 17:43:37,671 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:43:37,671 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:43:37,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-05-02 17:43:37,891 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:43:37,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:43:37,892 INFO L82 PathProgramCache]: Analyzing trace with hash -566829694, now seen corresponding path program 4 times [2021-05-02 17:43:37,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:43:37,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896974081] [2021-05-02 17:43:37,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:43:37,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:38,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:43:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:38,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-05-02 17:43:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:38,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2021-05-02 17:43:38,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:43:38,406 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 4 proven. 44 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 17:43:38,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:43:38,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896974081] [2021-05-02 17:43:38,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896974081] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:43:38,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470793640] [2021-05-02 17:43:38,406 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:43:38,489 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:43:38,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:43:38,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 17:43:38,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:43:38,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 29 [2021-05-02 17:43:38,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:38,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:38,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:43:38,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 25 [2021-05-02 17:43:38,589 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:38,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:38,594 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:43:38,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:38,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:43:38,605 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:47, output treesize:32 [2021-05-02 17:43:38,605 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:38,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:42,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:46,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:47,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:47,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:47,041 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:47,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:43:47,043 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:43:47,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:43:47,045 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:43:47,045 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:43:47,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:47,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:43:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 17:43:47,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470793640] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:43:47,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:43:47,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 25 [2021-05-02 17:43:47,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760852124] [2021-05-02 17:43:47,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:43:47,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:43:47,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:43:47,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=519, Unknown=2, NotChecked=0, Total=600 [2021-05-02 17:43:47,097 INFO L87 Difference]: Start difference. First operand 242 states and 290 transitions. Second operand has 25 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 17:44:26,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:44:26,757 INFO L93 Difference]: Finished difference Result 321 states and 378 transitions. [2021-05-02 17:44:26,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 17:44:26,757 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 57 [2021-05-02 17:44:26,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:44:26,758 INFO L225 Difference]: With dead ends: 321 [2021-05-02 17:44:26,758 INFO L226 Difference]: Without dead ends: 321 [2021-05-02 17:44:26,758 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 52 SyntacticMatches, 12 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 13662.9ms TimeCoverageRelationStatistics Valid=269, Invalid=1707, Unknown=4, NotChecked=0, Total=1980 [2021-05-02 17:44:26,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-05-02 17:44:26,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 298. [2021-05-02 17:44:26,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 278 states have (on average 1.1942446043165467) internal successors, (332), 281 states have internal predecessors, (332), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:44:26,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 353 transitions. [2021-05-02 17:44:26,768 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 353 transitions. Word has length 57 [2021-05-02 17:44:26,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:44:26,768 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 353 transitions. [2021-05-02 17:44:26,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 23 states have (on average 2.6956521739130435) internal successors, (62), 22 states have internal predecessors, (62), 5 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 17:44:26,768 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 353 transitions. [2021-05-02 17:44:26,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 17:44:26,785 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:44:26,785 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:44:27,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:44:27,005 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:44:27,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:44:27,005 INFO L82 PathProgramCache]: Analyzing trace with hash 420337901, now seen corresponding path program 7 times [2021-05-02 17:44:27,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:44:27,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100509460] [2021-05-02 17:44:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:44:27,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:27,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:44:27,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:27,689 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 7 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:44:27,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:44:27,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100509460] [2021-05-02 17:44:27,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100509460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:44:27,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547969681] [2021-05-02 17:44:27,690 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:44:27,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:27,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 17:44:27,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:44:28,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:28,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2021-05-02 17:44:28,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:28,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:28,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:28,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:37 [2021-05-02 17:44:28,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,222 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,373 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:28,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:28,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:28,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:28,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-05-02 17:44:28,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:28,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:28,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:28,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2021-05-02 17:44:28,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:28,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:44:28,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:28,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:28,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:28,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:44:28,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 17:44:28,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547969681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:44:28,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:44:28,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 35 [2021-05-02 17:44:28,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176759375] [2021-05-02 17:44:28,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:44:28,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:44:28,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:44:28,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:44:28,488 INFO L87 Difference]: Start difference. First operand 298 states and 353 transitions. Second operand has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 32 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:44:31,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:44:31,058 INFO L93 Difference]: Finished difference Result 429 states and 512 transitions. [2021-05-02 17:44:31,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 17:44:31,059 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 32 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-02 17:44:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:44:31,061 INFO L225 Difference]: With dead ends: 429 [2021-05-02 17:44:31,061 INFO L226 Difference]: Without dead ends: 429 [2021-05-02 17:44:31,062 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 42 SyntacticMatches, 6 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1240 ImplicationChecksByTransitivity, 2210.2ms TimeCoverageRelationStatistics Valid=547, Invalid=3875, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 17:44:31,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 429 states. [2021-05-02 17:44:31,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 429 to 298. [2021-05-02 17:44:31,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 278 states have (on average 1.1942446043165467) internal successors, (332), 281 states have internal predecessors, (332), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:44:31,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 353 transitions. [2021-05-02 17:44:31,069 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 353 transitions. Word has length 55 [2021-05-02 17:44:31,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:44:31,069 INFO L480 AbstractCegarLoop]: Abstraction has 298 states and 353 transitions. [2021-05-02 17:44:31,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 32 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:44:31,069 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 353 transitions. [2021-05-02 17:44:31,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 17:44:31,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:44:31,070 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:44:31,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-05-02 17:44:31,293 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:44:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:44:31,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1069053023, now seen corresponding path program 8 times [2021-05-02 17:44:31,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:44:31,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7967029] [2021-05-02 17:44:31,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:44:31,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:32,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:44:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:32,155 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:44:32,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:44:32,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7967029] [2021-05-02 17:44:32,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7967029] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:44:32,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185311405] [2021-05-02 17:44:32,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:44:32,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:44:32,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:44:32,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 17:44:32,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:44:32,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-05-02 17:44:32,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:32,500 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:32,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:32,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:23 [2021-05-02 17:44:32,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 39 [2021-05-02 17:44:32,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 32 [2021-05-02 17:44:32,686 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:32,692 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:32,693 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:32,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:32,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:32,710 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:65, output treesize:30 [2021-05-02 17:44:32,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,789 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 73 treesize of output 60 [2021-05-02 17:44:32,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,815 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 44 [2021-05-02 17:44:32,817 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:32,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:32,823 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:32,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:32,835 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:32,836 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:82, output treesize:44 [2021-05-02 17:44:32,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,917 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:32,920 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:32,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 47 [2021-05-02 17:44:32,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:32,933 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:32,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:32,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:17 [2021-05-02 17:44:32,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,975 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:32,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:44:32,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:32,980 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:32,981 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:32,981 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:44:32,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:32,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 17:44:33,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [185311405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:44:33,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:44:33,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 32 [2021-05-02 17:44:33,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138682415] [2021-05-02 17:44:33,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 17:44:33,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:44:33,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 17:44:33,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=865, Unknown=0, NotChecked=0, Total=992 [2021-05-02 17:44:33,037 INFO L87 Difference]: Start difference. First operand 298 states and 353 transitions. Second operand has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:44:35,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:44:35,675 INFO L93 Difference]: Finished difference Result 430 states and 511 transitions. [2021-05-02 17:44:35,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 17:44:35,676 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-02 17:44:35,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:44:35,678 INFO L225 Difference]: With dead ends: 430 [2021-05-02 17:44:35,678 INFO L226 Difference]: Without dead ends: 430 [2021-05-02 17:44:35,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 13 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 2167.8ms TimeCoverageRelationStatistics Valid=293, Invalid=2359, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 17:44:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2021-05-02 17:44:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 304. [2021-05-02 17:44:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 284 states have (on average 1.1971830985915493) internal successors, (340), 287 states have internal predecessors, (340), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:44:35,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 361 transitions. [2021-05-02 17:44:35,686 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 361 transitions. Word has length 55 [2021-05-02 17:44:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:44:35,686 INFO L480 AbstractCegarLoop]: Abstraction has 304 states and 361 transitions. [2021-05-02 17:44:35,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 29 states have internal predecessors, (69), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:44:35,687 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 361 transitions. [2021-05-02 17:44:35,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 17:44:35,687 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:44:35,687 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:44:35,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:44:35,909 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:44:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:44:35,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1859803737, now seen corresponding path program 9 times [2021-05-02 17:44:35,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:44:35,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963451410] [2021-05-02 17:44:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:44:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:36,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:44:36,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:36,998 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 3 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:44:36,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:44:36,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963451410] [2021-05-02 17:44:36,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963451410] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:44:36,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715460836] [2021-05-02 17:44:36,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:44:37,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-02 17:44:37,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:44:37,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 39 conjunts are in the unsatisfiable core [2021-05-02 17:44:37,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:44:37,384 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-05-02 17:44:37,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,429 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 23 [2021-05-02 17:44:37,432 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:37,437 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:37,438 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:37,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:37,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:37,448 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:40, output treesize:25 [2021-05-02 17:44:37,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:37,552 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 46 [2021-05-02 17:44:37,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:37,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:37,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:37,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:50 [2021-05-02 17:44:37,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:44:37,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:37,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 61 [2021-05-02 17:44:37,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:37,661 INFO L628 ElimStorePlain]: treesize reduction 12, result has 75.5 percent of original size [2021-05-02 17:44:37,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:37,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:61, output treesize:25 [2021-05-02 17:44:37,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,760 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:37,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:37,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 32 [2021-05-02 17:44:37,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:37,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:37,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:37,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:36, output treesize:17 [2021-05-02 17:44:37,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,826 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:37,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:44:37,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:37,830 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:37,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:37,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:44:37,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:37,892 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 17:44:37,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715460836] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:44:37,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:44:37,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22] total 39 [2021-05-02 17:44:37,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564658659] [2021-05-02 17:44:37,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 17:44:37,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:44:37,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 17:44:37,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=1272, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 17:44:37,894 INFO L87 Difference]: Start difference. First operand 304 states and 361 transitions. Second operand has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:44:40,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:44:40,068 INFO L93 Difference]: Finished difference Result 414 states and 490 transitions. [2021-05-02 17:44:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 17:44:40,070 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-02 17:44:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:44:40,071 INFO L225 Difference]: With dead ends: 414 [2021-05-02 17:44:40,071 INFO L226 Difference]: Without dead ends: 414 [2021-05-02 17:44:40,072 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 44 SyntacticMatches, 10 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 2261.7ms TimeCoverageRelationStatistics Valid=527, Invalid=3633, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 17:44:40,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-05-02 17:44:40,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 277. [2021-05-02 17:44:40,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 257 states have (on average 1.1867704280155642) internal successors, (305), 260 states have internal predecessors, (305), 11 states have call successors, (11), 9 states have call predecessors, (11), 8 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:44:40,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 326 transitions. [2021-05-02 17:44:40,077 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 326 transitions. Word has length 55 [2021-05-02 17:44:40,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:44:40,078 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 326 transitions. [2021-05-02 17:44:40,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 36 states have internal predecessors, (81), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:44:40,078 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 326 transitions. [2021-05-02 17:44:40,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 17:44:40,079 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:44:40,079 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:44:40,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:44:40,300 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:44:40,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:44:40,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1491092838, now seen corresponding path program 4 times [2021-05-02 17:44:40,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:44:40,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263338915] [2021-05-02 17:44:40,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:44:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:41,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:44:41,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:41,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-02 17:44:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:44:41,324 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:44:41,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:44:41,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263338915] [2021-05-02 17:44:41,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263338915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:44:41,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590727304] [2021-05-02 17:44:41,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:44:41,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:44:41,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:44:41,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 49 conjunts are in the unsatisfiable core [2021-05-02 17:44:41,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:44:41,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:41,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-05-02 17:44:41,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:41,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:41,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:44:41,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:37, output treesize:30 [2021-05-02 17:44:41,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,906 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:41,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:41,909 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:41,911 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:41,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2021-05-02 17:44:41,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:41,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:41,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:44:41,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:25 [2021-05-02 17:44:41,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:41,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,084 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:42,153 INFO L354 Elim1Store]: treesize reduction 113, result has 31.9 percent of original size [2021-05-02 17:44:42,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 68 [2021-05-02 17:44:42,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:42,192 INFO L628 ElimStorePlain]: treesize reduction 9, result has 85.9 percent of original size [2021-05-02 17:44:42,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,199 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:44:42,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:55 [2021-05-02 17:44:42,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:42,550 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:42,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:42,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:42,640 INFO L354 Elim1Store]: treesize reduction 102, result has 41.0 percent of original size [2021-05-02 17:44:42,641 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 62 treesize of output 113 [2021-05-02 17:44:42,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:42,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:42,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:42,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:42,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 40 [2021-05-02 17:44:42,698 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:42,789 INFO L628 ElimStorePlain]: treesize reduction 80, result has 61.2 percent of original size [2021-05-02 17:44:42,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 2 xjuncts. [2021-05-02 17:44:42,817 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:130, output treesize:126 [2021-05-02 17:44:42,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:42,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,023 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,508 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 52 [2021-05-02 17:44:43,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:43,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:43,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:43,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:43,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:43,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:43,640 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:43,689 INFO L354 Elim1Store]: treesize reduction 53, result has 44.2 percent of original size [2021-05-02 17:44:43,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 61 treesize of output 90 [2021-05-02 17:44:43,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,695 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:43,755 INFO L628 ElimStorePlain]: treesize reduction 31, result has 74.6 percent of original size [2021-05-02 17:44:43,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,784 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 17:44:43,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:88, output treesize:91 [2021-05-02 17:44:43,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:43,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,173 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,215 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:44,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,647 WARN L205 SmtUtils]: Spent 12.28 s on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2021-05-02 17:44:56,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:44:56,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:56,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:44:56,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:56,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:44:56,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:44:56,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 64 [2021-05-02 17:44:56,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:44:56,843 INFO L628 ElimStorePlain]: treesize reduction 22, result has 68.1 percent of original size [2021-05-02 17:44:56,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:44:56,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:70, output treesize:31 [2021-05-02 17:44:56,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:44:56,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,278 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,288 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,398 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,404 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:45:05,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:45:05,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:45:05,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:45:05,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:45:05,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:45:05,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:45:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 6 proven. 55 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:45:05,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590727304] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:45:05,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:45:05,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 48 [2021-05-02 17:45:05,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268380004] [2021-05-02 17:45:05,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 17:45:05,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:45:05,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 17:45:05,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2026, Unknown=1, NotChecked=0, Total=2256 [2021-05-02 17:45:05,501 INFO L87 Difference]: Start difference. First operand 277 states and 326 transitions. Second operand has 48 states, 47 states have (on average 1.8297872340425532) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:45:49,943 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 43 [2021-05-02 17:46:01,454 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 45 [2021-05-02 17:46:08,741 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 30 [2021-05-02 17:46:15,982 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 36 [2021-05-02 17:46:16,611 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2021-05-02 17:46:17,764 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 59 [2021-05-02 17:46:21,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:46:21,800 INFO L93 Difference]: Finished difference Result 521 states and 605 transitions. [2021-05-02 17:46:21,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 17:46:21,800 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.8297872340425532) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 58 [2021-05-02 17:46:21,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:46:21,802 INFO L225 Difference]: With dead ends: 521 [2021-05-02 17:46:21,802 INFO L226 Difference]: Without dead ends: 521 [2021-05-02 17:46:21,803 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 41 SyntacticMatches, 8 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4522 ImplicationChecksByTransitivity, 49966.6ms TimeCoverageRelationStatistics Valid=1253, Invalid=11846, Unknown=11, NotChecked=0, Total=13110 [2021-05-02 17:46:21,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2021-05-02 17:46:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 351. [2021-05-02 17:46:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 327 states have (on average 1.1865443425076452) internal successors, (388), 331 states have internal predecessors, (388), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (12), 8 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 17:46:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 413 transitions. [2021-05-02 17:46:21,808 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 413 transitions. Word has length 58 [2021-05-02 17:46:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:46:21,809 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 413 transitions. [2021-05-02 17:46:21,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 47 states have (on average 1.8297872340425532) internal successors, (86), 44 states have internal predecessors, (86), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:46:21,809 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 413 transitions. [2021-05-02 17:46:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 17:46:21,809 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:46:21,809 INFO L523 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:46:22,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-02 17:46:22,010 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:46:22,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:46:22,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1456746739, now seen corresponding path program 5 times [2021-05-02 17:46:22,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:46:22,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037807618] [2021-05-02 17:46:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:46:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:46:22,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:46:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:46:22,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-02 17:46:22,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:46:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 2 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:46:22,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:46:22,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037807618] [2021-05-02 17:46:22,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037807618] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:46:22,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159507154] [2021-05-02 17:46:22,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:46:22,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 17:46:22,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:46:22,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 44 conjunts are in the unsatisfiable core [2021-05-02 17:46:22,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:46:23,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,118 INFO L354 Elim1Store]: treesize reduction 39, result has 22.0 percent of original size [2021-05-02 17:46:23,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 27 [2021-05-02 17:46:23,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:23,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:23,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:46:23,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:46 [2021-05-02 17:46:23,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,320 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,407 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,428 INFO L354 Elim1Store]: treesize reduction 108, result has 10.0 percent of original size [2021-05-02 17:46:23,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 31 [2021-05-02 17:46:23,429 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:23,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:23,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 17:46:23,448 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:65, output treesize:38 [2021-05-02 17:46:23,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,568 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,776 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,851 INFO L354 Elim1Store]: treesize reduction 180, result has 13.5 percent of original size [2021-05-02 17:46:23,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 42 [2021-05-02 17:46:23,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:23,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:23,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:46:23,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:67, output treesize:58 [2021-05-02 17:46:23,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,957 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:23,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,092 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,109 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,166 INFO L354 Elim1Store]: treesize reduction 225, result has 13.8 percent of original size [2021-05-02 17:46:24,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 67 treesize of output 54 [2021-05-02 17:46:24,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:24,181 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:24,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,184 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:46:24,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:83, output treesize:58 [2021-05-02 17:46:24,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,302 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,312 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,372 INFO L354 Elim1Store]: treesize reduction 261, result has 16.9 percent of original size [2021-05-02 17:46:24,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 71 [2021-05-02 17:46:24,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:24,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:24,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:46:24,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:59 [2021-05-02 17:46:24,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,702 INFO L354 Elim1Store]: treesize reduction 96, result has 20.0 percent of original size [2021-05-02 17:46:24,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 39 [2021-05-02 17:46:24,704 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:46:24,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:46:24,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,716 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:46:24,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:27 [2021-05-02 17:46:24,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,985 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:24,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:25,000 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:25,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:25,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,998 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:58,999 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,018 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:46:59,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,151 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,330 INFO L354 Elim1Store]: treesize reduction 81, result has 8.0 percent of original size [2021-05-02 17:47:01,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 39 treesize of output 16 [2021-05-02 17:47:01,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:47:01,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:47:01,347 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:47:01,347 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:45, output treesize:3 [2021-05-02 17:47:01,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:47:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 4 proven. 57 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:47:01,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159507154] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:47:01,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:47:01,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 51 [2021-05-02 17:47:01,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342259007] [2021-05-02 17:47:01,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 17:47:01,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:47:01,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 17:47:01,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=2313, Unknown=13, NotChecked=0, Total=2550 [2021-05-02 17:47:01,548 INFO L87 Difference]: Start difference. First operand 351 states and 413 transitions. Second operand has 51 states, 50 states have (on average 1.92) internal successors, (96), 47 states have internal predecessors, (96), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:47:43,861 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 41 [2021-05-02 17:48:32,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:48:32,600 INFO L93 Difference]: Finished difference Result 480 states and 554 transitions. [2021-05-02 17:48:32,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 17:48:32,602 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.92) internal successors, (96), 47 states have internal predecessors, (96), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 58 [2021-05-02 17:48:32,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:48:32,603 INFO L225 Difference]: With dead ends: 480 [2021-05-02 17:48:32,603 INFO L226 Difference]: Without dead ends: 480 [2021-05-02 17:48:32,604 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2999 ImplicationChecksByTransitivity, 77754.3ms TimeCoverageRelationStatistics Valid=811, Invalid=8281, Unknown=28, NotChecked=0, Total=9120 [2021-05-02 17:48:32,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2021-05-02 17:48:32,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 337. [2021-05-02 17:48:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 316 states have (on average 1.1962025316455696) internal successors, (378), 319 states have internal predecessors, (378), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:48:32,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 399 transitions. [2021-05-02 17:48:32,610 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 399 transitions. Word has length 58 [2021-05-02 17:48:32,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:48:32,610 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 399 transitions. [2021-05-02 17:48:32,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 50 states have (on average 1.92) internal successors, (96), 47 states have internal predecessors, (96), 4 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 17:48:32,611 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 399 transitions. [2021-05-02 17:48:32,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 17:48:32,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:48:32,611 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:48:32,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:48:32,816 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:48:32,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:48:32,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1729807032, now seen corresponding path program 5 times [2021-05-02 17:48:32,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:48:32,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515214627] [2021-05-02 17:48:32,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:48:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:33,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:48:33,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:33,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-05-02 17:48:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:33,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 17:48:33,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:33,424 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 4 proven. 54 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:48:33,424 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:48:33,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515214627] [2021-05-02 17:48:33,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515214627] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:33,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403672262] [2021-05-02 17:48:33,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:48:33,648 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-02 17:48:33,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:48:33,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 17:48:33,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:48:33,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:33,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 30 [2021-05-02 17:48:33,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:33,787 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:33,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:33,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:53, output treesize:49 [2021-05-02 17:48:33,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:33,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:33,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 33 [2021-05-02 17:48:33,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:33,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:33,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,898 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:48:33,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:65, output treesize:37 [2021-05-02 17:48:33,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:33,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,367 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,375 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:34,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:34,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:48:34,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:34,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 15 [2021-05-02 17:48:34,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:34,509 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:34,511 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:34,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:44, output treesize:5 [2021-05-02 17:48:34,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 17:48:34,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403672262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:34,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:48:34,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 25 [2021-05-02 17:48:34,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406723963] [2021-05-02 17:48:34,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 17:48:34,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:48:34,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 17:48:34,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-05-02 17:48:34,589 INFO L87 Difference]: Start difference. First operand 337 states and 399 transitions. Second operand has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 22 states have internal predecessors, (68), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:48:36,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:48:36,782 INFO L93 Difference]: Finished difference Result 448 states and 520 transitions. [2021-05-02 17:48:36,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 17:48:36,784 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 22 states have internal predecessors, (68), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 60 [2021-05-02 17:48:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:48:36,785 INFO L225 Difference]: With dead ends: 448 [2021-05-02 17:48:36,786 INFO L226 Difference]: Without dead ends: 448 [2021-05-02 17:48:36,786 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 52 SyntacticMatches, 12 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1893.7ms TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:48:36,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-05-02 17:48:36,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 334. [2021-05-02 17:48:36,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 313 states have (on average 1.194888178913738) internal successors, (374), 316 states have internal predecessors, (374), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:48:36,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 395 transitions. [2021-05-02 17:48:36,794 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 395 transitions. Word has length 60 [2021-05-02 17:48:36,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:48:36,794 INFO L480 AbstractCegarLoop]: Abstraction has 334 states and 395 transitions. [2021-05-02 17:48:36,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 22 states have internal predecessors, (68), 4 states have call successors, (9), 5 states have call predecessors, (9), 3 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:48:36,794 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 395 transitions. [2021-05-02 17:48:36,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 17:48:36,795 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:48:36,795 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:48:36,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-05-02 17:48:36,996 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:48:36,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:48:36,996 INFO L82 PathProgramCache]: Analyzing trace with hash -995244383, now seen corresponding path program 10 times [2021-05-02 17:48:36,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:48:36,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811729360] [2021-05-02 17:48:36,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:48:37,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:37,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:48:37,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:37,631 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:48:37,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:48:37,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811729360] [2021-05-02 17:48:37,632 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811729360] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:37,632 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003228900] [2021-05-02 17:48:37,632 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:48:37,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:48:37,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:48:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 17:48:37,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:48:37,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:37,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:37,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:37,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:37,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:37,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:37,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-05-02 17:48:37,870 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:37,879 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:37,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:37,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:17 [2021-05-02 17:48:37,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:37,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:37,938 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:37,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:48:37,940 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:37,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:37,942 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:37,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:48:37,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:37,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:37,990 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 17:48:37,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003228900] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:37,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:48:37,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 22 [2021-05-02 17:48:37,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445192547] [2021-05-02 17:48:37,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 17:48:37,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:48:37,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 17:48:37,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2021-05-02 17:48:37,991 INFO L87 Difference]: Start difference. First operand 334 states and 395 transitions. Second operand has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:48:41,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:48:41,525 INFO L93 Difference]: Finished difference Result 788 states and 963 transitions. [2021-05-02 17:48:41,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 17:48:41,527 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 17:48:41,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:48:41,529 INFO L225 Difference]: With dead ends: 788 [2021-05-02 17:48:41,530 INFO L226 Difference]: Without dead ends: 788 [2021-05-02 17:48:41,530 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 52 SyntacticMatches, 8 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2038 ImplicationChecksByTransitivity, 2280.8ms TimeCoverageRelationStatistics Valid=564, Invalid=5916, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 17:48:41,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-05-02 17:48:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 391. [2021-05-02 17:48:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 370 states have (on average 1.2216216216216216) internal successors, (452), 373 states have internal predecessors, (452), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:48:41,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 473 transitions. [2021-05-02 17:48:41,543 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 473 transitions. Word has length 58 [2021-05-02 17:48:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:48:41,543 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 473 transitions. [2021-05-02 17:48:41,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:48:41,543 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 473 transitions. [2021-05-02 17:48:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 17:48:41,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:48:41,544 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:48:41,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:48:41,764 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:48:41,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:48:41,765 INFO L82 PathProgramCache]: Analyzing trace with hash -567010200, now seen corresponding path program 7 times [2021-05-02 17:48:41,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:48:41,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721668951] [2021-05-02 17:48:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:48:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:42,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:48:42,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:42,812 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:48:42,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:48:42,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721668951] [2021-05-02 17:48:42,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721668951] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:42,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652819856] [2021-05-02 17:48:42,812 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:48:42,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:42,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 17:48:42,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:48:43,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,269 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,285 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-05-02 17:48:43,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 28 [2021-05-02 17:48:43,287 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:43,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:43,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:43,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:42 [2021-05-02 17:48:43,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,563 INFO L354 Elim1Store]: treesize reduction 113, result has 9.6 percent of original size [2021-05-02 17:48:43,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 31 [2021-05-02 17:48:43,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:43,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:43,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:48:43,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:61, output treesize:33 [2021-05-02 17:48:43,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,777 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,933 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-05-02 17:48:43,933 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-05-02 17:48:43,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:43,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:43,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:48:43,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:46, output treesize:27 [2021-05-02 17:48:43,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:43,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,090 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,232 INFO L354 Elim1Store]: treesize reduction 36, result has 7.7 percent of original size [2021-05-02 17:48:44,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 13 [2021-05-02 17:48:44,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:44,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:44,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:43, output treesize:3 [2021-05-02 17:48:44,274 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:44,379 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 17:48:44,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652819856] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:44,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:48:44,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21] total 43 [2021-05-02 17:48:44,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016556585] [2021-05-02 17:48:44,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 17:48:44,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:48:44,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 17:48:44,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1668, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 17:48:44,381 INFO L87 Difference]: Start difference. First operand 391 states and 473 transitions. Second operand has 43 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 40 states have internal predecessors, (98), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:48:50,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:48:50,659 INFO L93 Difference]: Finished difference Result 651 states and 784 transitions. [2021-05-02 17:48:50,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 17:48:50,662 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 40 states have internal predecessors, (98), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 17:48:50,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:48:50,664 INFO L225 Difference]: With dead ends: 651 [2021-05-02 17:48:50,664 INFO L226 Difference]: Without dead ends: 651 [2021-05-02 17:48:50,665 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2348 ImplicationChecksByTransitivity, 4871.2ms TimeCoverageRelationStatistics Valid=738, Invalid=7634, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 17:48:50,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-05-02 17:48:50,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 378. [2021-05-02 17:48:50,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 357 states have (on average 1.2100840336134453) internal successors, (432), 360 states have internal predecessors, (432), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:48:50,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 453 transitions. [2021-05-02 17:48:50,688 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 453 transitions. Word has length 58 [2021-05-02 17:48:50,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:48:50,689 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 453 transitions. [2021-05-02 17:48:50,689 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 40 states have internal predecessors, (98), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:48:50,689 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 453 transitions. [2021-05-02 17:48:50,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 17:48:50,689 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:48:50,690 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:48:50,890 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-02 17:48:50,890 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:48:50,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:48:50,891 INFO L82 PathProgramCache]: Analyzing trace with hash 204581236, now seen corresponding path program 8 times [2021-05-02 17:48:50,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:48:50,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894567371] [2021-05-02 17:48:50,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:48:50,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:51,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:48:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 1 proven. 100 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-05-02 17:48:51,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:48:51,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894567371] [2021-05-02 17:48:51,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894567371] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:51,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807022186] [2021-05-02 17:48:51,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:48:51,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:48:51,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:48:51,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 17:48:51,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:48:51,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:51,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-05-02 17:48:51,805 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:51,815 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:51,816 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:51,816 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:38, output treesize:36 [2021-05-02 17:48:51,959 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:51,974 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:48:51,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:51,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:51,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 37 [2021-05-02 17:48:51,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,000 INFO L628 ElimStorePlain]: treesize reduction 7, result has 84.4 percent of original size [2021-05-02 17:48:52,002 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,003 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:48:52,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:35 [2021-05-02 17:48:52,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 34 [2021-05-02 17:48:52,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,133 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 36 [2021-05-02 17:48:52,136 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,141 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:52,142 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:52,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,152 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-05-02 17:48:52,221 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,233 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,235 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:52,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-05-02 17:48:52,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:52,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:27 [2021-05-02 17:48:52,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 78 treesize of output 65 [2021-05-02 17:48:52,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,318 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 49 [2021-05-02 17:48:52,330 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:52,336 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:52,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,346 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:86, output treesize:48 [2021-05-02 17:48:52,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,401 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:52,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 10 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 64 treesize of output 63 [2021-05-02 17:48:52,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:52,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:72, output treesize:47 [2021-05-02 17:48:52,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:52,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:52,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 43 [2021-05-02 17:48:52,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,492 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:52,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:19 [2021-05-02 17:48:52,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,529 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:52,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 12 [2021-05-02 17:48:52,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:52,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:52,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:5 [2021-05-02 17:48:52,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:52,586 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 17:48:52,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807022186] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:52,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:48:52,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 35 [2021-05-02 17:48:52,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773315651] [2021-05-02 17:48:52,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 17:48:52,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:48:52,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 17:48:52,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=1050, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 17:48:52,588 INFO L87 Difference]: Start difference. First operand 378 states and 453 transitions. Second operand has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 32 states have internal predecessors, (75), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:48:54,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:48:54,612 INFO L93 Difference]: Finished difference Result 512 states and 613 transitions. [2021-05-02 17:48:54,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 17:48:54,613 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 32 states have internal predecessors, (75), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 17:48:54,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:48:54,615 INFO L225 Difference]: With dead ends: 512 [2021-05-02 17:48:54,615 INFO L226 Difference]: Without dead ends: 512 [2021-05-02 17:48:54,615 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 39 SyntacticMatches, 15 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 1854.7ms TimeCoverageRelationStatistics Valid=312, Invalid=2880, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 17:48:54,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2021-05-02 17:48:54,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 378. [2021-05-02 17:48:54,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 378 states, 357 states have (on average 1.2100840336134453) internal successors, (432), 360 states have internal predecessors, (432), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:48:54,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 378 states to 378 states and 453 transitions. [2021-05-02 17:48:54,621 INFO L78 Accepts]: Start accepts. Automaton has 378 states and 453 transitions. Word has length 58 [2021-05-02 17:48:54,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:48:54,621 INFO L480 AbstractCegarLoop]: Abstraction has 378 states and 453 transitions. [2021-05-02 17:48:54,621 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 32 states have internal predecessors, (75), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 17:48:54,621 INFO L276 IsEmpty]: Start isEmpty. Operand 378 states and 453 transitions. [2021-05-02 17:48:54,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 17:48:54,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:48:54,622 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:48:54,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-02 17:48:54,833 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:48:54,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:48:54,833 INFO L82 PathProgramCache]: Analyzing trace with hash -72912652, now seen corresponding path program 6 times [2021-05-02 17:48:54,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:48:54,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291339036] [2021-05-02 17:48:54,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:48:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:55,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:48:55,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:55,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-05-02 17:48:55,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:48:55,704 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 2 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:48:55,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:48:55,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291339036] [2021-05-02 17:48:55,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291339036] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:48:55,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964750855] [2021-05-02 17:48:55,705 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:48:55,893 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-02 17:48:55,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:48:55,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 17:48:55,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:48:55,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:55,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:55,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:55,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-05-02 17:48:55,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:55,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:55,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:55,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2021-05-02 17:48:55,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:55,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 27 [2021-05-02 17:48:56,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 24 [2021-05-02 17:48:56,035 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:56,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:56,041 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:56,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:56,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:56,051 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:41, output treesize:27 [2021-05-02 17:48:56,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,129 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,131 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,133 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:56,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-05-02 17:48:56,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:56,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:56,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:56,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:28 [2021-05-02 17:48:56,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 77 treesize of output 64 [2021-05-02 17:48:56,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,194 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,198 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,199 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 48 [2021-05-02 17:48:56,206 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:56,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:56,211 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:56,220 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:56,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:48:56,221 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:86, output treesize:48 [2021-05-02 17:48:56,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,324 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:48:56,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:56,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 55 treesize of output 51 [2021-05-02 17:48:56,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:48:56,355 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:48:56,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:48:56,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:64, output treesize:27 [2021-05-02 17:48:56,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:48:56,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,632 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,633 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:49:02,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:49:02,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:49:02,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:49:02,836 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:49:02,836 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:49:02,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:49:02,908 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 17:49:02,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964750855] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:49:02,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:49:02,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25] total 36 [2021-05-02 17:49:02,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202510283] [2021-05-02 17:49:02,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 17:49:02,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:49:02,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 17:49:02,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1119, Unknown=3, NotChecked=0, Total=1260 [2021-05-02 17:49:02,909 INFO L87 Difference]: Start difference. First operand 378 states and 453 transitions. Second operand has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:49:41,513 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-02 17:49:51,446 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-02 17:49:59,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:49:59,347 INFO L93 Difference]: Finished difference Result 591 states and 696 transitions. [2021-05-02 17:49:59,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 17:49:59,347 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2021-05-02 17:49:59,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:49:59,350 INFO L225 Difference]: With dead ends: 591 [2021-05-02 17:49:59,350 INFO L226 Difference]: Without dead ends: 591 [2021-05-02 17:49:59,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 48 SyntacticMatches, 13 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 10165.0ms TimeCoverageRelationStatistics Valid=410, Invalid=3747, Unknown=3, NotChecked=0, Total=4160 [2021-05-02 17:49:59,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-05-02 17:49:59,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 428. [2021-05-02 17:49:59,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 400 states have (on average 1.205) internal successors, (482), 405 states have internal predecessors, (482), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 17:49:59,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 511 transitions. [2021-05-02 17:49:59,361 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 511 transitions. Word has length 60 [2021-05-02 17:49:59,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:49:59,361 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 511 transitions. [2021-05-02 17:49:59,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 32 states have internal predecessors, (78), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:49:59,362 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 511 transitions. [2021-05-02 17:49:59,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 17:49:59,362 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:49:59,363 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:49:59,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:49:59,563 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:49:59,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:49:59,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1614972502, now seen corresponding path program 6 times [2021-05-02 17:49:59,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:49:59,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465933914] [2021-05-02 17:49:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:49:59,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:01,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:50:01,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:01,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-05-02 17:50:01,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:50:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 2 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:50:01,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:50:01,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465933914] [2021-05-02 17:50:01,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465933914] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:50:01,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775399167] [2021-05-02 17:50:01,808 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:50:02,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 17:50:02,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:50:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 17:50:02,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:50:02,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:02,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:02,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:02,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:02,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:02,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-05-02 17:50:02,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:50:02,449 INFO L628 ElimStorePlain]: treesize reduction 7, result has 84.4 percent of original size [2021-05-02 17:50:02,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:50:02,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:35 [2021-05-02 17:50:02,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:02,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:02,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:02,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 62 [2021-05-02 17:50:02,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:02,717 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 46 [2021-05-02 17:50:02,758 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-05-02 17:50:02,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:50:02,773 INFO L550 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:50:02,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:50:02,795 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:50:02,795 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:83, output treesize:45 [2021-05-02 17:50:02,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:02,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:02,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:02,912 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,913 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,918 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:02,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:50:02,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 41 [2021-05-02 17:50:02,932 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:50:02,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:50:02,950 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:50:02,950 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:54, output treesize:35 [2021-05-02 17:50:03,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:03,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:03,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:03,103 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:03,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:03,164 INFO L354 Elim1Store]: treesize reduction 96, result has 23.8 percent of original size [2021-05-02 17:50:03,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 54 treesize of output 67 [2021-05-02 17:50:03,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:50:03,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:50:03,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:50:03,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:62, output treesize:66 [2021-05-02 17:50:03,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:03,683 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-02 17:50:03,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:03,688 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-02 17:50:03,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:50:03,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 50 [2021-05-02 17:50:03,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:50:03,737 INFO L628 ElimStorePlain]: treesize reduction 12, result has 75.5 percent of original size [2021-05-02 17:50:03,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,742 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:50:03,742 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:62, output treesize:30 [2021-05-02 17:50:03,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:03,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:50:06,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 10 [2021-05-02 17:50:06,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:50:06,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:50:06,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:50:06,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:3 [2021-05-02 17:50:06,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:50:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 17:50:06,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775399167] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:50:06,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:50:06,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2021-05-02 17:50:06,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656582982] [2021-05-02 17:50:06,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 17:50:06,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:50:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 17:50:06,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 17:50:06,838 INFO L87 Difference]: Start difference. First operand 428 states and 511 transitions. Second operand has 40 states, 39 states have (on average 2.076923076923077) internal successors, (81), 36 states have internal predecessors, (81), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:51:08,947 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2021-05-02 17:51:12,344 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2021-05-02 17:51:13,915 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-02 17:51:14,800 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-05-02 17:51:15,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:51:15,401 INFO L93 Difference]: Finished difference Result 586 states and 698 transitions. [2021-05-02 17:51:15,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 17:51:15,403 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.076923076923077) internal successors, (81), 36 states have internal predecessors, (81), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 61 [2021-05-02 17:51:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:51:15,406 INFO L225 Difference]: With dead ends: 586 [2021-05-02 17:51:15,406 INFO L226 Difference]: Without dead ends: 586 [2021-05-02 17:51:15,407 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 47 SyntacticMatches, 18 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 22005.6ms TimeCoverageRelationStatistics Valid=657, Invalid=6309, Unknown=6, NotChecked=0, Total=6972 [2021-05-02 17:51:15,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2021-05-02 17:51:15,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 455. [2021-05-02 17:51:15,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 427 states have (on average 1.2060889929742389) internal successors, (515), 432 states have internal predecessors, (515), 15 states have call successors, (15), 13 states have call predecessors, (15), 12 states have return successors, (14), 9 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 17:51:15,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 544 transitions. [2021-05-02 17:51:15,440 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 544 transitions. Word has length 61 [2021-05-02 17:51:15,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:51:15,441 INFO L480 AbstractCegarLoop]: Abstraction has 455 states and 544 transitions. [2021-05-02 17:51:15,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 39 states have (on average 2.076923076923077) internal successors, (81), 36 states have internal predecessors, (81), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:51:15,441 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 544 transitions. [2021-05-02 17:51:15,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 17:51:15,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:51:15,442 INFO L523 BasicCegarLoop]: trace histogram [7, 5, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:51:15,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-05-02 17:51:15,658 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:51:15,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:51:15,659 INFO L82 PathProgramCache]: Analyzing trace with hash 482961859, now seen corresponding path program 7 times [2021-05-02 17:51:15,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:51:15,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827632852] [2021-05-02 17:51:15,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:51:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:17,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:51:17,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:17,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-05-02 17:51:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 9 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:51:17,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:51:17,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827632852] [2021-05-02 17:51:17,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827632852] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:51:17,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840931286] [2021-05-02 17:51:17,911 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:51:17,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:51:17,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 50 conjunts are in the unsatisfiable core [2021-05-02 17:51:17,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:51:18,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,477 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-05-02 17:51:18,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 27 [2021-05-02 17:51:18,482 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:51:18,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:51:18,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:51:18,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:41 [2021-05-02 17:51:18,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:18,987 INFO L354 Elim1Store]: treesize reduction 109, result has 9.2 percent of original size [2021-05-02 17:51:18,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 49 treesize of output 30 [2021-05-02 17:51:18,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:51:19,007 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:51:19,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:51:19,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:32 [2021-05-02 17:51:19,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,199 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,326 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,543 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,625 INFO L354 Elim1Store]: treesize reduction 88, result has 20.0 percent of original size [2021-05-02 17:51:19,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 37 [2021-05-02 17:51:19,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:51:19,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:51:19,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,663 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:51:19,663 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:51, output treesize:30 [2021-05-02 17:51:19,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,771 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,778 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:19,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,078 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,217 INFO L354 Elim1Store]: treesize reduction 162, result has 17.3 percent of original size [2021-05-02 17:51:20,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 49 [2021-05-02 17:51:20,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:51:20,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:51:20,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,250 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:51:20,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:51 [2021-05-02 17:51:20,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,580 INFO L354 Elim1Store]: treesize reduction 168, result has 15.6 percent of original size [2021-05-02 17:51:20,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 53 treesize of output 46 [2021-05-02 17:51:20,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:51:20,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:51:20,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:51:20,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:64, output treesize:45 [2021-05-02 17:51:20,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:20,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,275 INFO L354 Elim1Store]: treesize reduction 247, result has 9.2 percent of original size [2021-05-02 17:51:21,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 10 case distinctions, treesize of input 58 treesize of output 43 [2021-05-02 17:51:21,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:51:21,312 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:51:21,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,325 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: 2 dim-0 vars, and 1 xjuncts. [2021-05-02 17:51:21,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:72, output treesize:54 [2021-05-02 17:51:21,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,334 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,335 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,604 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,624 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:21,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,106 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,223 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,357 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 28 [2021-05-02 17:51:22,359 INFO L354 Elim1Store]: treesize reduction 148, result has 24.5 percent of original size [2021-05-02 17:51:22,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 66 [2021-05-02 17:51:22,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:51:22,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-02 17:51:22,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 4 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-05-02 17:51:22,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:73, output treesize:25 [2021-05-02 17:51:22,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,746 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,765 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,779 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:22,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,009 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,015 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,044 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:51:23,049 WARN L159 QuantifierPusher]: Ignoring assumption.