/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/linear_search.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:37:15,787 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:37:15,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:37:15,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 17:37:15,831 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 17:37:15,834 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 17:37:15,837 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 17:37:15,842 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 17:37:15,845 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 17:37:15,850 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 17:37:15,851 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 17:37:15,853 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 17:37:15,853 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:37:15,855 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:37:15,856 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:37:15,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:37:15,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:37:15,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:37:15,864 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:37:15,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:37:15,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:37:15,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:37:15,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:37:15,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:37:15,878 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 17:37:15,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 17:37:15,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 17:37:15,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 17:37:15,880 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 17:37:15,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 17:37:15,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 17:37:15,883 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 17:37:15,884 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 17:37:15,885 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 17:37:15,886 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 17:37:15,886 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 17:37:15,887 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 17:37:15,887 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 17:37:15,887 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:37:15,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:37:15,896 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:37:15,900 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 17:37:15,914 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:37:15,914 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:37:15,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:37:15,917 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:37:15,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:37:15,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:37:15,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:37:15,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:37:15,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:37:15,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:37:15,918 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:37:15,919 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:37:15,919 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:37:15,919 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:37:15,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:37:15,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:37:15,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 17:37:15,920 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:37:15,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:37:15,920 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:37:15,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:37:15,921 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 17:37:15,921 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:37:16,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:37:16,280 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:37:16,282 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:37:16,283 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:37:16,283 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:37:16,284 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_search.c [2021-05-02 17:37:16,334 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e7186ef9/ecc75763971b45688d1c8336e2c22c78/FLAG18c8151b6 [2021-05-02 17:37:16,804 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:37:16,805 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_search.c [2021-05-02 17:37:16,810 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e7186ef9/ecc75763971b45688d1c8336e2c22c78/FLAG18c8151b6 [2021-05-02 17:37:17,206 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e7186ef9/ecc75763971b45688d1c8336e2c22c78 [2021-05-02 17:37:17,209 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:37:17,210 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 17:37:17,215 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:37:17,215 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:37:17,218 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:37:17,219 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:37:17" (1/1) ... [2021-05-02 17:37:17,220 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bb0f09c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:17, skipping insertion in model container [2021-05-02 17:37:17,220 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:37:17" (1/1) ... [2021-05-02 17:37:17,227 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:37:17,241 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:37:17,340 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/linear_search.c[358,371] [2021-05-02 17:37:17,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:37:17,367 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:37:17,387 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/linear_search.c[358,371] [2021-05-02 17:37:17,422 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:37:17,434 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:37:17,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:17 WrapperNode [2021-05-02 17:37:17,435 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:37:17,436 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:37:17,436 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:37:17,436 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:37:17,445 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:17" (1/1) ... [2021-05-02 17:37:17,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:17" (1/1) ... [2021-05-02 17:37:17,451 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:17" (1/1) ... [2021-05-02 17:37:17,451 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:17" (1/1) ... [2021-05-02 17:37:17,456 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:17" (1/1) ... [2021-05-02 17:37:17,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:17" (1/1) ... [2021-05-02 17:37:17,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:17" (1/1) ... [2021-05-02 17:37:17,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:37:17,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:37:17,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:37:17,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:37:17,469 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:17" (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 17:37:17,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:37:17,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:37:17,547 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:37:17,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:37:17,547 INFO L138 BoogieDeclarations]: Found implementation of procedure linear_search [2021-05-02 17:37:17,548 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:37:17,548 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:37:17,548 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:37:17,548 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:37:17,549 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:37:17,549 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-05-02 17:37:17,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:37:17,549 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-05-02 17:37:17,549 INFO L130 BoogieDeclarations]: Found specification of procedure linear_search [2021-05-02 17:37:17,550 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:37:17,550 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:37:17,550 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-05-02 17:37:17,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:37:17,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:37:17,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:37:17,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:37:17,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:37:17,901 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:37:17,901 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:37:17,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:37:17 BoogieIcfgContainer [2021-05-02 17:37:17,903 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:37:17,904 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 17:37:17,904 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 17:37:17,905 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 17:37:17,907 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:37:17" (1/1) ... [2021-05-02 17:37:17,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:37:17 BasicIcfg [2021-05-02 17:37:17,928 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 17:37:17,930 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:37:17,930 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:37:17,933 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:37:17,933 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:37:17" (1/4) ... [2021-05-02 17:37:17,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69653e5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:37:17, skipping insertion in model container [2021-05-02 17:37:17,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:37:17" (2/4) ... [2021-05-02 17:37:17,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69653e5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:37:17, skipping insertion in model container [2021-05-02 17:37:17,936 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:37:17" (3/4) ... [2021-05-02 17:37:17,936 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69653e5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:37:17, skipping insertion in model container [2021-05-02 17:37:17,937 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 05:37:17" (4/4) ... [2021-05-02 17:37:17,938 INFO L111 eAbstractionObserver]: Analyzing ICFG linear_search.cJordan [2021-05-02 17:37:17,943 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:37:17,947 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:37:17,961 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:37:17,986 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:37:17,987 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 17:37:17,987 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 17:37:17,987 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:37:17,987 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:37:17,987 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:37:17,987 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:37:17,987 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:37:18,001 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 17:37:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 17:37:18,008 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:18,009 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:18,010 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:18,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:18,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1247891396, now seen corresponding path program 1 times [2021-05-02 17:37:18,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:18,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052643828] [2021-05-02 17:37:18,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:18,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:18,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:18,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:18,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:18,356 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 17:37:18,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:18,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052643828] [2021-05-02 17:37:18,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052643828] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:18,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:18,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:37:18,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964619191] [2021-05-02 17:37:18,364 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:37:18,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:18,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:37:18,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:37:18,378 INFO L87 Difference]: Start difference. First operand has 29 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 20 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:18,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:18,429 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2021-05-02 17:37:18,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:37:18,431 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 17:37:18,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:18,436 INFO L225 Difference]: With dead ends: 29 [2021-05-02 17:37:18,437 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 17:37:18,438 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:37:18,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 17:37:18,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 17:37:18,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-05-02 17:37:18,465 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2021-05-02 17:37:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:18,466 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-05-02 17:37:18,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-05-02 17:37:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 17:37:18,467 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:18,467 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:18,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:37:18,467 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:18,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:18,468 INFO L82 PathProgramCache]: Analyzing trace with hash 797626370, now seen corresponding path program 1 times [2021-05-02 17:37:18,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:18,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130325127] [2021-05-02 17:37:18,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:18,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:18,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:18,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:18,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:18,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:18,647 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 17:37:18,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:18,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130325127] [2021-05-02 17:37:18,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130325127] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:18,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:18,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 17:37:18,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627588300] [2021-05-02 17:37:18,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:37:18,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:18,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:37:18,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:37:18,652 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:18,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:18,809 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-05-02 17:37:18,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:37:18,810 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2021-05-02 17:37:18,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:18,811 INFO L225 Difference]: With dead ends: 28 [2021-05-02 17:37:18,811 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 17:37:18,811 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:37:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 17:37:18,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-05-02 17:37:18,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-05-02 17:37:18,815 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 20 [2021-05-02 17:37:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:18,815 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-05-02 17:37:18,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 5 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-05-02 17:37:18,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 17:37:18,816 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:18,816 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:18,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 17:37:18,817 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:18,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:18,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1754530591, now seen corresponding path program 1 times [2021-05-02 17:37:18,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:18,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799685467] [2021-05-02 17:37:18,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:18,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:18,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:18,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:18,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:18,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,026 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 17:37:19,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:19,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799685467] [2021-05-02 17:37:19,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799685467] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:19,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:19,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 17:37:19,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646353812] [2021-05-02 17:37:19,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 17:37:19,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:19,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 17:37:19,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 17:37:19,029 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:19,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:19,238 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 17:37:19,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:37:19,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2021-05-02 17:37:19,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:19,239 INFO L225 Difference]: With dead ends: 26 [2021-05-02 17:37:19,239 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 17:37:19,239 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:37:19,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 17:37:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 17:37:19,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:19,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-05-02 17:37:19,243 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2021-05-02 17:37:19,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:19,243 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-05-02 17:37:19,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 3 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:19,243 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-05-02 17:37:19,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 17:37:19,244 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:19,244 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] [2021-05-02 17:37:19,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 17:37:19,244 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:19,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:19,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1852385448, now seen corresponding path program 1 times [2021-05-02 17:37:19,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:19,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808932490] [2021-05-02 17:37:19,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:19,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:19,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,339 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:19,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:19,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808932490] [2021-05-02 17:37:19,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808932490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:19,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:19,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 17:37:19,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109672288] [2021-05-02 17:37:19,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 17:37:19,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:19,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 17:37:19,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:37:19,342 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:19,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:19,459 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2021-05-02 17:37:19,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 17:37:19,460 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2021-05-02 17:37:19,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:19,462 INFO L225 Difference]: With dead ends: 32 [2021-05-02 17:37:19,462 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 17:37:19,462 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:37:19,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 17:37:19,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2021-05-02 17:37:19,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:19,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 17:37:19,466 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 24 [2021-05-02 17:37:19,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:19,467 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 17:37:19,467 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:19,467 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 17:37:19,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 17:37:19,468 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:19,468 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] [2021-05-02 17:37:19,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 17:37:19,468 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:19,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:19,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1723302729, now seen corresponding path program 1 times [2021-05-02 17:37:19,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:19,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082992192] [2021-05-02 17:37:19,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:19,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:19,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082992192] [2021-05-02 17:37:19,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082992192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:19,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488674281] [2021-05-02 17:37:19,684 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 17:37:19,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:19,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 17:37:19,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:19,929 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:19,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488674281] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:19,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:19,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 5] total 12 [2021-05-02 17:37:19,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220529601] [2021-05-02 17:37:19,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 17:37:19,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:19,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 17:37:19,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:37:19,932 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:37:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:20,220 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-02 17:37:20,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:37:20,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2021-05-02 17:37:20,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:20,224 INFO L225 Difference]: With dead ends: 30 [2021-05-02 17:37:20,224 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 17:37:20,227 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 289.0ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:37:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 17:37:20,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 17:37:20,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-05-02 17:37:20,241 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 24 [2021-05-02 17:37:20,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:20,241 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-05-02 17:37:20,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 3 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:37:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-05-02 17:37:20,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 17:37:20,242 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:20,242 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:20,464 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:20,464 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:20,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:20,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1323531310, now seen corresponding path program 1 times [2021-05-02 17:37:20,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:20,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430921060] [2021-05-02 17:37:20,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:20,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,578 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:20,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:20,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430921060] [2021-05-02 17:37:20,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430921060] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:20,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597376774] [2021-05-02 17:37:20,579 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 17:37:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:20,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 17:37:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:20,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:20,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:20,731 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:20,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597376774] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:20,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:20,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 17:37:20,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812027096] [2021-05-02 17:37:20,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:37:20,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:20,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:37:20,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:37:20,733 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:20,900 INFO L93 Difference]: Finished difference Result 36 states and 42 transitions. [2021-05-02 17:37:20,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 17:37:20,900 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-05-02 17:37:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:20,901 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:37:20,901 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 17:37:20,901 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:37:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 17:37:20,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-05-02 17:37:20,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:20,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-05-02 17:37:20,904 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 28 [2021-05-02 17:37:20,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:20,905 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-05-02 17:37:20,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:20,905 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-05-02 17:37:20,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 17:37:20,905 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:20,906 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:21,120 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:21,121 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:21,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:21,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1452614029, now seen corresponding path program 2 times [2021-05-02 17:37:21,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:21,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409674952] [2021-05-02 17:37:21,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:21,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:21,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:21,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 17:37:21,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:21,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409674952] [2021-05-02 17:37:21,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409674952] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:21,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419497388] [2021-05-02 17:37:21,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:21,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-05-02 17:37:21,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:21,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 17:37:21,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:21,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:21,698 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 17:37:21,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419497388] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:21,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:21,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-02 17:37:21,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759999707] [2021-05-02 17:37:21,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 17:37:21,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:21,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 17:37:21,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:37:21,700 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 17:37:22,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:22,107 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2021-05-02 17:37:22,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:37:22,108 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 17:37:22,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:22,108 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:37:22,108 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 17:37:22,109 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=115, Invalid=305, Unknown=0, NotChecked=0, Total=420 [2021-05-02 17:37:22,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 17:37:22,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2021-05-02 17:37:22,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 24 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:22,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2021-05-02 17:37:22,115 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 28 [2021-05-02 17:37:22,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:22,116 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2021-05-02 17:37:22,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 13 states have internal predecessors, (32), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 17:37:22,116 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2021-05-02 17:37:22,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 17:37:22,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:22,117 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:22,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:22,318 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:22,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:22,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1256100524, now seen corresponding path program 1 times [2021-05-02 17:37:22,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:22,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580947895] [2021-05-02 17:37:22,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:22,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:22,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:22,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:22,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:22,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:23,355 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:23,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:23,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580947895] [2021-05-02 17:37:23,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580947895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:23,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135527453] [2021-05-02 17:37:23,356 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 17:37:23,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:23,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-02 17:37:23,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:23,491 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,527 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 21 treesize of output 17 [2021-05-02 17:37:23,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:23,545 INFO L628 ElimStorePlain]: treesize reduction 47, result has 32.9 percent of original size [2021-05-02 17:37:23,545 INFO L518 ElimStorePlain]: Eliminatee |v_#memory_int_7| vanished before elimination [2021-05-02 17:37:23,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:23,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:74, output treesize:23 [2021-05-02 17:37:23,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:23,966 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,013 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,014 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,016 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,017 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,027 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,038 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,043 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,050 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,100 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:24,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135527453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:24,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:24,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9] total 21 [2021-05-02 17:37:24,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719135120] [2021-05-02 17:37:24,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 17:37:24,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:24,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 17:37:24,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-02 17:37:24,124 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 17:37:24,776 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 81 [2021-05-02 17:37:25,977 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 92 [2021-05-02 17:37:26,425 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 92 [2021-05-02 17:37:26,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:26,583 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2021-05-02 17:37:26,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 17:37:26,583 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-05-02 17:37:26,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:26,584 INFO L225 Difference]: With dead ends: 47 [2021-05-02 17:37:26,584 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 17:37:26,585 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2091.7ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:37:26,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 17:37:26,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 35. [2021-05-02 17:37:26,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:26,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2021-05-02 17:37:26,587 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 28 [2021-05-02 17:37:26,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:26,588 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2021-05-02 17:37:26,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 19 states have internal predecessors, (40), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 17:37:26,588 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2021-05-02 17:37:26,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 17:37:26,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:26,589 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:26,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:26,789 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:26,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:26,790 INFO L82 PathProgramCache]: Analyzing trace with hash 750541899, now seen corresponding path program 2 times [2021-05-02 17:37:26,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:26,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308519874] [2021-05-02 17:37:26,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:26,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:26,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:26,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:26,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:26,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 17:37:26,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:26,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308519874] [2021-05-02 17:37:26,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308519874] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:37:26,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:37:26,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 17:37:26,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898207708] [2021-05-02 17:37:26,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 17:37:26,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:26,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 17:37:26,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 17:37:26,850 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:26,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:26,911 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-05-02 17:37:26,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 17:37:26,912 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 28 [2021-05-02 17:37:26,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:26,912 INFO L225 Difference]: With dead ends: 36 [2021-05-02 17:37:26,913 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 17:37:26,913 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 17:37:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 17:37:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 17:37:26,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-05-02 17:37:26,915 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 28 [2021-05-02 17:37:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:26,915 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-05-02 17:37:26,915 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-05-02 17:37:26,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 17:37:26,916 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:26,916 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:26,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 17:37:26,916 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:26,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:26,917 INFO L82 PathProgramCache]: Analyzing trace with hash -1924188381, now seen corresponding path program 1 times [2021-05-02 17:37:26,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:26,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365756025] [2021-05-02 17:37:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:26,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:26,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:26,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:27,043 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:27,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:27,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365756025] [2021-05-02 17:37:27,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365756025] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:27,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000344290] [2021-05-02 17:37:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:27,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 17:37:27,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:27,166 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:27,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000344290] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:27,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:27,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 17:37:27,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093748260] [2021-05-02 17:37:27,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:37:27,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:27,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:37:27,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:37:27,184 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:27,380 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-05-02 17:37:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:37:27,381 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2021-05-02 17:37:27,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:27,381 INFO L225 Difference]: With dead ends: 42 [2021-05-02 17:37:27,381 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 17:37:27,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:37:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 17:37:27,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2021-05-02 17:37:27,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:27,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-05-02 17:37:27,384 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2021-05-02 17:37:27,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:27,384 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-05-02 17:37:27,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 states have internal predecessors, (29), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:27,385 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-05-02 17:37:27,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 17:37:27,385 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:27,385 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:27,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:37:27,589 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:27,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:27,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1795105662, now seen corresponding path program 3 times [2021-05-02 17:37:27,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:27,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394680735] [2021-05-02 17:37:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:27,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:27,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:27,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:27,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:28,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:28,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394680735] [2021-05-02 17:37:28,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394680735] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:28,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050803961] [2021-05-02 17:37:28,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:29,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:37:29,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:29,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 17:37:29,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:29,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,152 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 21 treesize of output 17 [2021-05-02 17:37:29,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:37:29,177 INFO L628 ElimStorePlain]: treesize reduction 68, result has 34.6 percent of original size [2021-05-02 17:37:29,178 INFO L518 ElimStorePlain]: Eliminatee v_prenex_2 vanished before elimination [2021-05-02 17:37:29,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:37:29,178 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:108, output treesize:36 [2021-05-02 17:37:29,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,233 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,287 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,812 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:29,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,035 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-05-02 17:37:30,046 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,052 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,055 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,132 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,213 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,216 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:30,614 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:30,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050803961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:30,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:30,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 31 [2021-05-02 17:37:30,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203769078] [2021-05-02 17:37:30,615 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 17:37:30,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:30,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 17:37:30,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=847, Unknown=0, NotChecked=0, Total=930 [2021-05-02 17:37:30,616 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 31 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 27 states have internal predecessors, (47), 6 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 17:37:31,334 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2021-05-02 17:37:31,603 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 93 [2021-05-02 17:37:31,778 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2021-05-02 17:37:31,993 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 86 [2021-05-02 17:37:32,286 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 94 [2021-05-02 17:37:32,544 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 98 [2021-05-02 17:37:33,097 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 92 [2021-05-02 17:37:33,342 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 105 [2021-05-02 17:37:33,570 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 102 [2021-05-02 17:37:33,741 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 88 [2021-05-02 17:37:33,992 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 82 [2021-05-02 17:37:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:34,139 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2021-05-02 17:37:34,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 17:37:34,139 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 27 states have internal predecessors, (47), 6 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 32 [2021-05-02 17:37:34,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:34,140 INFO L225 Difference]: With dead ends: 50 [2021-05-02 17:37:34,140 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 17:37:34,141 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 4664.0ms TimeCoverageRelationStatistics Valid=285, Invalid=1877, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 17:37:34,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 17:37:34,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 37. [2021-05-02 17:37:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:34,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-05-02 17:37:34,144 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2021-05-02 17:37:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:34,144 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-05-02 17:37:34,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 27 states have internal predecessors, (47), 6 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 17:37:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-05-02 17:37:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:37:34,145 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:34,145 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:34,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:34,349 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:34,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:34,350 INFO L82 PathProgramCache]: Analyzing trace with hash 116172281, now seen corresponding path program 2 times [2021-05-02 17:37:34,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:34,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219314134] [2021-05-02 17:37:34,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:34,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:34,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:34,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:34,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:34,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:34,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:37:34,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219314134] [2021-05-02 17:37:34,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219314134] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:34,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264518192] [2021-05-02 17:37:34,484 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 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 17:37:34,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:37:34,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:37:34,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:37:34,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:37:34,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:37:34,656 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 12 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:37:34,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264518192] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:37:34,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:37:34,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-05-02 17:37:34,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238796162] [2021-05-02 17:37:34,657 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:37:34,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:37:34,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:37:34,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:37:34,658 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:34,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:37:34,920 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-05-02 17:37:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:37:34,921 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2021-05-02 17:37:34,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:37:34,921 INFO L225 Difference]: With dead ends: 46 [2021-05-02 17:37:34,921 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 17:37:34,922 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 235.7ms TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:37:34,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 17:37:34,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-05-02 17:37:34,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:37:34,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-05-02 17:37:34,924 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2021-05-02 17:37:34,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:37:34,924 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-05-02 17:37:34,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:37:34,924 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-05-02 17:37:34,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:37:34,925 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:37:34,925 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:37:35,133 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:37:35,133 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:37:35,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:37:35,133 INFO L82 PathProgramCache]: Analyzing trace with hash 245255000, now seen corresponding path program 4 times [2021-05-02 17:37:35,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:37:35,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007168113] [2021-05-02 17:37:35,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:37:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:35,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:37:35,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:35,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:37:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:37:36,854 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 87 [2021-05-02 17:37:37,817 WARN L205 SmtUtils]: Spent 492.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2021-05-02 17:37:40,254 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 111 DAG size of output: 106 [2021-05-02 17:37:44,215 WARN L205 SmtUtils]: Spent 1.73 s on a formula simplification. DAG size of input: 109 DAG size of output: 105 [2021-05-02 17:37:52,678 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 104 DAG size of output: 98 [2021-05-02 17:37:59,822 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 78 [2021-05-02 17:38:01,830 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2021-05-02 17:38:02,715 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 79 [2021-05-02 17:38:02,717 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:02,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:38:02,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007168113] [2021-05-02 17:38:02,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007168113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:02,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76041017] [2021-05-02 17:38:02,718 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 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 17:38:02,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:38:02,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:38:02,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 40 conjunts are in the unsatisfiable core [2021-05-02 17:38:02,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:38:02,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:02,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:02,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:02,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:02,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:02,875 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 21 treesize of output 17 [2021-05-02 17:38:02,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-02 17:38:02,894 INFO L628 ElimStorePlain]: treesize reduction 52, result has 35.0 percent of original size [2021-05-02 17:38:02,894 INFO L518 ElimStorePlain]: Eliminatee v_prenex_3 vanished before elimination [2021-05-02 17:38:02,895 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2021-05-02 17:38:02,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:84, output treesize:28 [2021-05-02 17:38:03,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,074 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,236 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 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,577 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,795 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:03,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,157 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,799 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 47 [2021-05-02 17:38:04,801 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:04,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,061 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,376 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,890 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2021-05-02 17:38:05,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:05,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,112 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,128 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,299 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,531 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,557 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,887 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:06,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:07,150 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:07,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:07,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:07,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:07,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:07,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:07,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:38:07,178 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:38:07,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76041017] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:38:07,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:38:07,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 14] total 32 [2021-05-02 17:38:07,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348899524] [2021-05-02 17:38:07,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 17:38:07,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:38:07,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 17:38:07,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=910, Unknown=2, NotChecked=0, Total=992 [2021-05-02 17:38:07,180 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 32 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 17:38:08,065 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 76 [2021-05-02 17:38:08,770 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2021-05-02 17:38:09,181 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 84 [2021-05-02 17:38:10,060 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2021-05-02 17:38:10,788 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 97 [2021-05-02 17:38:11,260 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 120 [2021-05-02 17:38:12,135 WARN L205 SmtUtils]: Spent 380.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 122 [2021-05-02 17:38:12,809 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 135 [2021-05-02 17:38:13,837 WARN L205 SmtUtils]: Spent 707.00 ms on a formula simplification. DAG size of input: 220 DAG size of output: 157 [2021-05-02 17:38:18,237 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 312 DAG size of output: 151 [2021-05-02 17:38:19,032 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 170 DAG size of output: 125 [2021-05-02 17:38:20,856 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 205 DAG size of output: 146 [2021-05-02 17:38:30,064 WARN L205 SmtUtils]: Spent 1.37 s on a formula simplification. DAG size of input: 230 DAG size of output: 122 [2021-05-02 17:38:53,180 WARN L205 SmtUtils]: Spent 3.95 s on a formula simplification. DAG size of input: 202 DAG size of output: 120 [2021-05-02 17:39:13,606 WARN L205 SmtUtils]: Spent 9.39 s on a formula simplification. DAG size of input: 262 DAG size of output: 121 [2021-05-02 17:39:14,064 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 105 [2021-05-02 17:39:14,298 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 90 [2021-05-02 17:39:14,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:14,504 INFO L93 Difference]: Finished difference Result 53 states and 56 transitions. [2021-05-02 17:39:14,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 17:39:14,505 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 36 [2021-05-02 17:39:14,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:14,505 INFO L225 Difference]: With dead ends: 53 [2021-05-02 17:39:14,505 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 17:39:14,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 26 SyntacticMatches, 7 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 93283.0ms TimeCoverageRelationStatistics Valid=387, Invalid=2465, Unknown=10, NotChecked=0, Total=2862 [2021-05-02 17:39:14,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 17:39:14,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 41. [2021-05-02 17:39:14,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:39:14,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-05-02 17:39:14,509 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 36 [2021-05-02 17:39:14,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:14,510 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-05-02 17:39:14,510 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 5 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 17:39:14,510 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-05-02 17:39:14,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 17:39:14,510 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:14,510 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:14,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 17:39:14,726 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:14,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:14,727 INFO L82 PathProgramCache]: Analyzing trace with hash -2081769009, now seen corresponding path program 3 times [2021-05-02 17:39:14,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:14,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097617457] [2021-05-02 17:39:14,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:14,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:14,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:14,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:39:14,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:14,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:39:14,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097617457] [2021-05-02 17:39:14,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097617457] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:14,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354289184] [2021-05-02 17:39:14,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:39:15,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 17:39:15,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:39:15,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 17:39:15,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:39:15,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:15,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:39:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 15 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 17:39:15,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1354289184] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:39:15,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 17:39:15,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 17:39:15,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896316319] [2021-05-02 17:39:15,253 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:39:15,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:39:15,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:39:15,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:39:15,254 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:39:15,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:39:15,655 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-05-02 17:39:15,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:39:15,656 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 40 [2021-05-02 17:39:15,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:39:15,656 INFO L225 Difference]: With dead ends: 50 [2021-05-02 17:39:15,656 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 17:39:15,657 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 321.2ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:39:15,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 17:39:15,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 43. [2021-05-02 17:39:15,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 17:39:15,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-05-02 17:39:15,660 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2021-05-02 17:39:15,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:39:15,660 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-05-02 17:39:15,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 17:39:15,660 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-05-02 17:39:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 17:39:15,660 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:39:15,661 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:39:15,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 17:39:15,866 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:39:15,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:39:15,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1952686290, now seen corresponding path program 5 times [2021-05-02 17:39:15,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:39:15,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455404384] [2021-05-02 17:39:15,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:39:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:16,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:39:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:39:16,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2021-05-02 17:39:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat