/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/nla-digbench-scaling/fermat1-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:35:47,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:35:47,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:35:47,945 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:35:47,945 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:35:47,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:35:47,951 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:35:47,956 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:35:47,958 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:35:47,964 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:35:47,965 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:35:47,966 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:35:47,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:35:47,969 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:35:47,970 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:35:47,971 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:35:47,974 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:35:47,975 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:35:47,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:35:47,977 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:35:47,979 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:35:47,981 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:35:47,982 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:35:47,983 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:35:47,985 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 20:35:47,985 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 20:35:47,985 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 20:35:47,986 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 20:35:47,986 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 20:35:47,987 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 20:35:47,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 20:35:47,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 20:35:47,988 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 20:35:47,989 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 20:35:47,990 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 20:35:47,990 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 20:35:47,990 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 20:35:47,991 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 20:35:47,991 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:35:47,991 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:35:47,992 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:35:47,999 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:35:48,020 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:35:48,021 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:35:48,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:35:48,022 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:35:48,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:35:48,022 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:35:48,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:35:48,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:35:48,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:35:48,023 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:35:48,023 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:35:48,023 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:35:48,023 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:35:48,024 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:35:48,024 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:35:48,024 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:35:48,024 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:35:48,024 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:35:48,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:35:48,024 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:35:48,025 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:35:48,025 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:35:48,025 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:35:48,283 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:35:48,303 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:35:48,305 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:35:48,306 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:35:48,307 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:35:48,307 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound20.c [2021-05-02 20:35:48,377 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57102ef0a/9d5f1a7b21c14dc998097b99b599da63/FLAG37ae0f6ae [2021-05-02 20:35:48,835 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:35:48,836 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound20.c [2021-05-02 20:35:48,844 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57102ef0a/9d5f1a7b21c14dc998097b99b599da63/FLAG37ae0f6ae [2021-05-02 20:35:49,236 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/57102ef0a/9d5f1a7b21c14dc998097b99b599da63 [2021-05-02 20:35:49,242 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:35:49,246 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:35:49,248 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:35:49,248 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:35:49,251 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:35:49,252 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:35:49" (1/1) ... [2021-05-02 20:35:49,253 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e2230d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:49, skipping insertion in model container [2021-05-02 20:35:49,253 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:35:49" (1/1) ... [2021-05-02 20:35:49,260 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:35:49,274 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:35:49,373 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound20.c[535,548] [2021-05-02 20:35:49,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:35:49,394 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:35:49,411 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat1-ll_valuebound20.c[535,548] [2021-05-02 20:35:49,434 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:35:49,453 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:35:49,454 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:49 WrapperNode [2021-05-02 20:35:49,454 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:35:49,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:35:49,455 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:35:49,455 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:35:49,467 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:49" (1/1) ... [2021-05-02 20:35:49,467 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:49" (1/1) ... [2021-05-02 20:35:49,483 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:49" (1/1) ... [2021-05-02 20:35:49,483 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:49" (1/1) ... [2021-05-02 20:35:49,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:49" (1/1) ... [2021-05-02 20:35:49,491 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:49" (1/1) ... [2021-05-02 20:35:49,492 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:49" (1/1) ... [2021-05-02 20:35:49,505 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:35:49,506 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:35:49,506 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:35:49,506 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:35:49,507 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:49" (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 20:35:49,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:35:49,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:35:49,578 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:35:49,579 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:35:49,579 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:35:49,579 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:35:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:35:49,579 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:35:49,580 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:35:49,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:35:49,580 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:35:49,580 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:35:49,581 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:35:49,581 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:35:49,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:35:49,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:35:49,581 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:35:49,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:35:49,582 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:35:49,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:35:49,915 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:35:49,915 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 20:35:49,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:35:49 BoogieIcfgContainer [2021-05-02 20:35:49,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:35:49,917 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:35:49,917 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:35:49,918 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:35:49,920 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:35:49" (1/1) ... [2021-05-02 20:35:49,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:35:49 BasicIcfg [2021-05-02 20:35:49,934 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:35:49,935 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:35:49,935 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:35:49,938 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:35:49,938 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:35:49" (1/4) ... [2021-05-02 20:35:49,938 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4652f14e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:35:49, skipping insertion in model container [2021-05-02 20:35:49,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:35:49" (2/4) ... [2021-05-02 20:35:49,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4652f14e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:35:49, skipping insertion in model container [2021-05-02 20:35:49,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:35:49" (3/4) ... [2021-05-02 20:35:49,939 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4652f14e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:35:49, skipping insertion in model container [2021-05-02 20:35:49,939 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:35:49" (4/4) ... [2021-05-02 20:35:49,940 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat1-ll_valuebound20.cJordan [2021-05-02 20:35:49,944 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:35:49,947 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:35:49,958 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:35:49,980 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:35:49,980 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:35:49,980 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:35:49,980 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:35:49,980 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:35:49,981 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:35:49,981 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:35:49,981 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:35:49,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 20:35:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:35:50,004 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:50,005 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:50,005 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:50,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:50,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1042421720, now seen corresponding path program 1 times [2021-05-02 20:35:50,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:50,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115609171] [2021-05-02 20:35:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:50,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:50,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 20:35:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:50,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 20:35:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:50,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 20:35:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:50,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 20:35:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:50,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 20:35:50,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:50,317 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 20:35:50,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:50,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115609171] [2021-05-02 20:35:50,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115609171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:35:50,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:35:50,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 20:35:50,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120286464] [2021-05-02 20:35:50,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 20:35:50,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:50,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 20:35:50,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:35:50,338 INFO L87 Difference]: Start difference. First operand has 37 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 22 states have internal predecessors, (33), 10 states have call successors, (10), 4 states have call predecessors, (10), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:35:50,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:35:50,451 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2021-05-02 20:35:50,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 20:35:50,453 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:35:50,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:35:50,459 INFO L225 Difference]: With dead ends: 37 [2021-05-02 20:35:50,460 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 20:35:50,461 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 20:35:50,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 20:35:50,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 20:35:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 10 states have call successors, (10), 4 states have call predecessors, (10), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 20:35:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2021-05-02 20:35:50,509 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 33 [2021-05-02 20:35:50,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:35:50,509 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2021-05-02 20:35:50,510 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, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:35:50,510 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2021-05-02 20:35:50,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 20:35:50,512 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:35:50,512 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:35:50,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 20:35:50,512 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:35:50,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:35:50,514 INFO L82 PathProgramCache]: Analyzing trace with hash 104571547, now seen corresponding path program 1 times [2021-05-02 20:35:50,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:35:50,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362825213] [2021-05-02 20:35:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:35:50,543 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:35:50,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2115805416] [2021-05-02 20:35:50,543 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 20:35:50,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:35:50,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 20:35:50,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:35:50,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:50,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:50,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:50,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:50,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:50,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:50,963 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:50,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:35:51,041 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:35:51,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:35:51,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362825213] [2021-05-02 20:35:51,042 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:35:51,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115805416] [2021-05-02 20:35:51,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115805416] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:35:51,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:35:51,043 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:35:51,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484250786] [2021-05-02 20:35:51,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:35:51,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:35:51,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:35:51,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:35:51,045 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:36:01,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:36:01,235 INFO L93 Difference]: Finished difference Result 46 states and 59 transitions. [2021-05-02 20:36:01,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:36:01,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 20:36:01,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:36:01,237 INFO L225 Difference]: With dead ends: 46 [2021-05-02 20:36:01,237 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 20:36:01,238 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:36:01,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 20:36:01,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 20:36:01,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 27 states have (on average 1.2592592592592593) internal successors, (34), 28 states have internal predecessors, (34), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 20:36:01,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 58 transitions. [2021-05-02 20:36:01,246 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 58 transitions. Word has length 33 [2021-05-02 20:36:01,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:36:01,246 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 58 transitions. [2021-05-02 20:36:01,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 20:36:01,246 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 58 transitions. [2021-05-02 20:36:01,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 20:36:01,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:36:01,247 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:36:01,468 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 20:36:01,469 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:36:01,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:36:01,469 INFO L82 PathProgramCache]: Analyzing trace with hash -844389750, now seen corresponding path program 1 times [2021-05-02 20:36:01,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:36:01,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471827602] [2021-05-02 20:36:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:36:01,483 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:36:01,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [117288924] [2021-05-02 20:36:01,483 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 20:36:01,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:01,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:36:01,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:36:01,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:01,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:01,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:01,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:01,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:01,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:01,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:01,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:01,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:01,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:01,890 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 20:36:01,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:36:01,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471827602] [2021-05-02 20:36:01,891 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:36:01,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117288924] [2021-05-02 20:36:01,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117288924] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:36:01,891 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:36:01,892 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:36:01,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633965656] [2021-05-02 20:36:01,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:36:01,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:36:01,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:36:01,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:36:01,895 INFO L87 Difference]: Start difference. First operand 45 states and 58 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:36:20,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:36:20,793 INFO L93 Difference]: Finished difference Result 61 states and 76 transitions. [2021-05-02 20:36:20,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:36:20,793 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 20:36:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:36:20,796 INFO L225 Difference]: With dead ends: 61 [2021-05-02 20:36:20,796 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 20:36:20,796 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 157.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:36:20,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 20:36:20,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2021-05-02 20:36:20,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 36 states have internal predecessors, (38), 15 states have call successors, (15), 6 states have call predecessors, (15), 5 states have return successors, (14), 11 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 20:36:20,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 67 transitions. [2021-05-02 20:36:20,818 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 67 transitions. Word has length 39 [2021-05-02 20:36:20,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:36:20,819 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 67 transitions. [2021-05-02 20:36:20,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 20:36:20,819 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 67 transitions. [2021-05-02 20:36:20,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 20:36:20,820 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:36:20,820 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:36:21,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:36:21,021 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:36:21,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:36:21,021 INFO L82 PathProgramCache]: Analyzing trace with hash -2009827732, now seen corresponding path program 1 times [2021-05-02 20:36:21,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:36:21,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522006097] [2021-05-02 20:36:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:36:21,031 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:36:21,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939079020] [2021-05-02 20:36:21,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:36:21,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:36:21,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 20:36:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:36:21,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:21,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,404 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:36:23,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,428 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,457 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,489 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,493 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:23,586 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 20:36:23,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:36:23,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522006097] [2021-05-02 20:36:23,587 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:36:23,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939079020] [2021-05-02 20:36:23,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939079020] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:36:23,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:36:23,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 20:36:23,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113242865] [2021-05-02 20:36:23,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 20:36:23,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:36:23,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 20:36:23,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 20:36:23,588 INFO L87 Difference]: Start difference. First operand 54 states and 67 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:36:29,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:36:29,279 INFO L93 Difference]: Finished difference Result 81 states and 99 transitions. [2021-05-02 20:36:29,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 20:36:29,281 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 47 [2021-05-02 20:36:29,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:36:29,282 INFO L225 Difference]: With dead ends: 81 [2021-05-02 20:36:29,282 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 20:36:29,282 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 2160.3ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:36:29,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 20:36:29,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 75. [2021-05-02 20:36:29,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 47 states have (on average 1.148936170212766) internal successors, (54), 52 states have internal predecessors, (54), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (19), 14 states have call predecessors, (19), 19 states have call successors, (19) [2021-05-02 20:36:29,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 93 transitions. [2021-05-02 20:36:29,291 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 93 transitions. Word has length 47 [2021-05-02 20:36:29,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:36:29,291 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 93 transitions. [2021-05-02 20:36:29,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 20:36:29,291 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 93 transitions. [2021-05-02 20:36:29,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 20:36:29,292 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:36:29,292 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:36:29,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:36:29,504 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:36:29,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:36:29,504 INFO L82 PathProgramCache]: Analyzing trace with hash 2016182430, now seen corresponding path program 2 times [2021-05-02 20:36:29,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:36:29,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486185376] [2021-05-02 20:36:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:36:29,512 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:36:29,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1890971865] [2021-05-02 20:36:29,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:36:29,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:36:29,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:36:29,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 20:36:29,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:36:29,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 20:36:29,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:36:29,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486185376] [2021-05-02 20:36:29,906 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:36:29,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890971865] [2021-05-02 20:36:29,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890971865] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:36:29,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:36:29,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:36:29,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974727664] [2021-05-02 20:36:29,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:36:29,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:36:29,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:36:29,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 20:36:29,908 INFO L87 Difference]: Start difference. First operand 75 states and 93 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 20:36:34,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:36:34,178 INFO L93 Difference]: Finished difference Result 102 states and 125 transitions. [2021-05-02 20:36:34,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:36:34,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) Word has length 54 [2021-05-02 20:36:34,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:36:34,180 INFO L225 Difference]: With dead ends: 102 [2021-05-02 20:36:34,180 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 20:36:34,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:36:34,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 20:36:34,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 96. [2021-05-02 20:36:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 68 states have internal predecessors, (70), 25 states have call successors, (25), 10 states have call predecessors, (25), 9 states have return successors, (24), 17 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 20:36:34,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 119 transitions. [2021-05-02 20:36:34,188 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 119 transitions. Word has length 54 [2021-05-02 20:36:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:36:34,188 INFO L480 AbstractCegarLoop]: Abstraction has 96 states and 119 transitions. [2021-05-02 20:36:34,188 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 6 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 4 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-02 20:36:34,189 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 119 transitions. [2021-05-02 20:36:34,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 20:36:34,190 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:36:34,190 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:36:34,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:36:34,397 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:36:34,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:36:34,397 INFO L82 PathProgramCache]: Analyzing trace with hash 921696812, now seen corresponding path program 3 times [2021-05-02 20:36:34,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:36:34,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618324932] [2021-05-02 20:36:34,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:36:34,406 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:36:34,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [347495516] [2021-05-02 20:36:34,407 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 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 20:36:34,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:36:34,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:36:34,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-02 20:36:34,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:36:34,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,580 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,747 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,754 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,775 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:34,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,189 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:36:37,285 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 26 proven. 11 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 20:36:37,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:36:37,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618324932] [2021-05-02 20:36:37,285 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:36:37,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347495516] [2021-05-02 20:36:37,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347495516] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:36:37,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:36:37,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 20:36:37,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933176221] [2021-05-02 20:36:37,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 20:36:37,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:36:37,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 20:36:37,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=130, Unknown=1, NotChecked=0, Total=156 [2021-05-02 20:36:37,288 INFO L87 Difference]: Start difference. First operand 96 states and 119 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:36:45,082 WARN L205 SmtUtils]: Spent 5.61 s on a formula simplification. DAG size of input: 43 DAG size of output: 39 [2021-05-02 20:37:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:21,396 INFO L93 Difference]: Finished difference Result 168 states and 208 transitions. [2021-05-02 20:37:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 20:37:21,397 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 61 [2021-05-02 20:37:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:21,399 INFO L225 Difference]: With dead ends: 168 [2021-05-02 20:37:21,399 INFO L226 Difference]: Without dead ends: 168 [2021-05-02 20:37:21,399 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 11185.7ms TimeCoverageRelationStatistics Valid=87, Invalid=417, Unknown=2, NotChecked=0, Total=506 [2021-05-02 20:37:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-02 20:37:21,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2021-05-02 20:37:21,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 110 states have (on average 1.1545454545454545) internal successors, (127), 121 states have internal predecessors, (127), 41 states have call successors, (41), 17 states have call predecessors, (41), 16 states have return successors, (40), 29 states have call predecessors, (40), 40 states have call successors, (40) [2021-05-02 20:37:21,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2021-05-02 20:37:21,415 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 61 [2021-05-02 20:37:21,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:21,416 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2021-05-02 20:37:21,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 11 states have internal predecessors, (26), 5 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-05-02 20:37:21,416 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2021-05-02 20:37:21,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 20:37:21,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:21,418 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:21,618 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 20:37:21,618 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:21,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:21,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1148557238, now seen corresponding path program 1 times [2021-05-02 20:37:21,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:21,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638471879] [2021-05-02 20:37:21,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:21,625 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:21,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994570704] [2021-05-02 20:37:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:37:21,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 43 conjunts are in the unsatisfiable core [2021-05-02 20:37:21,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:21,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:21,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:21,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:21,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:21,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:21,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:21,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:21,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:37,684 WARN L205 SmtUtils]: Spent 9.58 s on a formula simplification that was a NOOP. DAG size: 31 [2021-05-02 20:37:37,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:37,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:43,766 WARN L205 SmtUtils]: Spent 6.02 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:37:43,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:43,796 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:49,880 WARN L205 SmtUtils]: Spent 4.03 s on a formula simplification that was a NOOP. DAG size: 23 [2021-05-02 20:37:49,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:49,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:49,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:49,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:49,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:49,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:49,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:49,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:49,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:49,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:49,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:49,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:59,191 WARN L205 SmtUtils]: Spent 4.19 s on a formula simplification that was a NOOP. DAG size: 32 [2021-05-02 20:38:15,888 WARN L205 SmtUtils]: Spent 6.06 s on a formula simplification that was a NOOP. DAG size: 35 [2021-05-02 20:38:15,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:15,930 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:38:16,066 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 22 proven. 38 refuted. 2 times theorem prover too weak. 54 trivial. 0 not checked. [2021-05-02 20:38:16,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:38:16,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638471879] [2021-05-02 20:38:16,067 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:38:16,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994570704] [2021-05-02 20:38:16,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994570704] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:38:16,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:38:16,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:38:16,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867698082] [2021-05-02 20:38:16,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:38:16,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:38:16,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:38:16,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=163, Unknown=8, NotChecked=0, Total=210 [2021-05-02 20:38:16,069 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 20:39:27,552 WARN L205 SmtUtils]: Spent 28.63 s on a formula simplification that was a NOOP. DAG size: 42 [2021-05-02 20:39:45,665 WARN L205 SmtUtils]: Spent 14.02 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2021-05-02 20:40:04,641 WARN L205 SmtUtils]: Spent 12.11 s on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-05-02 20:41:52,353 WARN L205 SmtUtils]: Spent 7.39 s on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 20:42:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:42:01,973 INFO L93 Difference]: Finished difference Result 248 states and 316 transitions. [2021-05-02 20:42:01,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 20:42:01,974 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 75 [2021-05-02 20:42:01,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:42:01,977 INFO L225 Difference]: With dead ends: 248 [2021-05-02 20:42:01,977 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 20:42:01,977 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 128745.7ms TimeCoverageRelationStatistics Valid=84, Invalid=365, Unknown=13, NotChecked=0, Total=462 [2021-05-02 20:42:01,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 20:42:01,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 224. [2021-05-02 20:42:01,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 148 states have (on average 1.1689189189189189) internal successors, (173), 161 states have internal predecessors, (173), 55 states have call successors, (55), 21 states have call predecessors, (55), 20 states have return successors, (54), 41 states have call predecessors, (54), 54 states have call successors, (54) [2021-05-02 20:42:01,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 282 transitions. [2021-05-02 20:42:01,995 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 282 transitions. Word has length 75 [2021-05-02 20:42:01,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:42:01,996 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 282 transitions. [2021-05-02 20:42:01,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 13 states have internal predecessors, (32), 7 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2021-05-02 20:42:01,996 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 282 transitions. [2021-05-02 20:42:01,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 20:42:01,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:42:01,998 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:42:02,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:42:02,213 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:42:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:42:02,214 INFO L82 PathProgramCache]: Analyzing trace with hash 341788388, now seen corresponding path program 2 times [2021-05-02 20:42:02,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:42:02,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214698145] [2021-05-02 20:42:02,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:42:02,222 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:42:02,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [473016577] [2021-05-02 20:42:02,223 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 20:42:02,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:42:02,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:42:02,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 20:42:02,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:42:02,366 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,481 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,565 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,748 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:02,762 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-05-02 20:42:02,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:42:02,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214698145] [2021-05-02 20:42:02,762 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:42:02,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473016577] [2021-05-02 20:42:02,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473016577] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:42:02,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:42:02,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 20:42:02,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846024412] [2021-05-02 20:42:02,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 20:42:02,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:42:02,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 20:42:02,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 20:42:02,764 INFO L87 Difference]: Start difference. First operand 224 states and 282 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 20:42:03,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:42:03,409 INFO L93 Difference]: Finished difference Result 255 states and 325 transitions. [2021-05-02 20:42:03,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 20:42:03,410 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 82 [2021-05-02 20:42:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:42:03,413 INFO L225 Difference]: With dead ends: 255 [2021-05-02 20:42:03,413 INFO L226 Difference]: Without dead ends: 255 [2021-05-02 20:42:03,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 375.9ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:42:03,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-05-02 20:42:03,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 254. [2021-05-02 20:42:03,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 168 states have (on average 1.1607142857142858) internal successors, (195), 181 states have internal predecessors, (195), 65 states have call successors, (65), 21 states have call predecessors, (65), 20 states have return successors, (64), 51 states have call predecessors, (64), 64 states have call successors, (64) [2021-05-02 20:42:03,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 324 transitions. [2021-05-02 20:42:03,430 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 324 transitions. Word has length 82 [2021-05-02 20:42:03,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:42:03,430 INFO L480 AbstractCegarLoop]: Abstraction has 254 states and 324 transitions. [2021-05-02 20:42:03,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 8 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2021-05-02 20:42:03,430 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 324 transitions. [2021-05-02 20:42:03,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:42:03,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:42:03,432 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:42:03,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:42:03,649 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:42:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:42:03,649 INFO L82 PathProgramCache]: Analyzing trace with hash -2045268700, now seen corresponding path program 1 times [2021-05-02 20:42:03,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:42:03,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905379356] [2021-05-02 20:42:03,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:42:03,657 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:42:03,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530790232] [2021-05-02 20:42:03,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 20:42:03,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:42:03,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 20:42:03,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:42:03,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,874 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,905 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,914 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,916 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,944 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,951 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,958 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,960 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,965 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,978 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,980 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,984 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,994 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:03,996 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,024 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,045 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,047 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,049 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,051 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,053 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,060 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,062 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,063 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,070 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,135 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,138 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:04,140 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,190 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,206 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,214 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,245 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,311 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,319 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,337 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,346 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,355 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,496 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:06,724 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 61 proven. 37 refuted. 4 times theorem prover too weak. 82 trivial. 0 not checked. [2021-05-02 20:42:06,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:42:06,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905379356] [2021-05-02 20:42:06,725 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:42:06,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530790232] [2021-05-02 20:42:06,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530790232] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:42:06,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:42:06,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 20:42:06,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012384990] [2021-05-02 20:42:06,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 20:42:06,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:42:06,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 20:42:06,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=180, Unknown=1, NotChecked=0, Total=210 [2021-05-02 20:42:06,726 INFO L87 Difference]: Start difference. First operand 254 states and 324 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 20:42:40,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:42:40,071 INFO L93 Difference]: Finished difference Result 326 states and 413 transitions. [2021-05-02 20:42:40,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:42:40,072 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) Word has length 89 [2021-05-02 20:42:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:42:40,074 INFO L225 Difference]: With dead ends: 326 [2021-05-02 20:42:40,074 INFO L226 Difference]: Without dead ends: 326 [2021-05-02 20:42:40,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 6622.9ms TimeCoverageRelationStatistics Valid=70, Invalid=479, Unknown=3, NotChecked=0, Total=552 [2021-05-02 20:42:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-05-02 20:42:40,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 326. [2021-05-02 20:42:40,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 217 states have (on average 1.1612903225806452) internal successors, (252), 234 states have internal predecessors, (252), 81 states have call successors, (81), 28 states have call predecessors, (81), 27 states have return successors, (80), 63 states have call predecessors, (80), 80 states have call successors, (80) [2021-05-02 20:42:40,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 413 transitions. [2021-05-02 20:42:40,094 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 413 transitions. Word has length 89 [2021-05-02 20:42:40,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:42:40,094 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 413 transitions. [2021-05-02 20:42:40,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 13 states have internal predecessors, (37), 8 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 7 states have call predecessors, (13), 7 states have call successors, (13) [2021-05-02 20:42:40,094 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 413 transitions. [2021-05-02 20:42:40,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:42:40,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:42:40,096 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:42:40,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 20:42:40,309 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:42:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:42:40,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1914671820, now seen corresponding path program 2 times [2021-05-02 20:42:40,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:42:40,309 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876155194] [2021-05-02 20:42:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:42:40,315 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:42:40,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [727276329] [2021-05-02 20:42:40,315 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 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 20:42:40,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 20:42:40,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:42:40,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-02 20:42:40,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:42:40,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,504 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,520 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,538 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:40,606 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 94 proven. 3 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-05-02 20:42:40,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:42:40,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876155194] [2021-05-02 20:42:40,606 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:42:40,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727276329] [2021-05-02 20:42:40,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727276329] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:42:40,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:42:40,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2021-05-02 20:42:40,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791685163] [2021-05-02 20:42:40,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:42:40,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:42:40,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:42:40,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:42:40,610 INFO L87 Difference]: Start difference. First operand 326 states and 413 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:42:40,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:42:40,677 INFO L93 Difference]: Finished difference Result 345 states and 437 transitions. [2021-05-02 20:42:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 20:42:40,679 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 89 [2021-05-02 20:42:40,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:42:40,681 INFO L225 Difference]: With dead ends: 345 [2021-05-02 20:42:40,681 INFO L226 Difference]: Without dead ends: 345 [2021-05-02 20:42:40,681 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 20:42:40,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2021-05-02 20:42:40,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 345. [2021-05-02 20:42:40,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 234 states have (on average 1.1623931623931625) internal successors, (272), 238 states have internal predecessors, (272), 83 states have call successors, (83), 28 states have call predecessors, (83), 27 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2021-05-02 20:42:40,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 437 transitions. [2021-05-02 20:42:40,709 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 437 transitions. Word has length 89 [2021-05-02 20:42:40,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:42:40,710 INFO L480 AbstractCegarLoop]: Abstraction has 345 states and 437 transitions. [2021-05-02 20:42:40,710 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 4 states have internal predecessors, (30), 4 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-05-02 20:42:40,710 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 437 transitions. [2021-05-02 20:42:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 20:42:40,714 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:42:40,714 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 5, 5, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:42:40,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:42:40,918 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:42:40,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:42:40,918 INFO L82 PathProgramCache]: Analyzing trace with hash -842490076, now seen corresponding path program 3 times [2021-05-02 20:42:40,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:42:40,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140629880] [2021-05-02 20:42:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:42:40,930 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:42:40,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084886354] [2021-05-02 20:42:40,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:42:40,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 20:42:40,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:42:40,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:42:40,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:42:41,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:41,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:41,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:41,188 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 49 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2021-05-02 20:42:41,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:42:41,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140629880] [2021-05-02 20:42:41,224 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:42:41,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084886354] [2021-05-02 20:42:41,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084886354] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:42:41,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:42:41,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:42:41,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040330924] [2021-05-02 20:42:41,225 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:42:41,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:42:41,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:42:41,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:42:41,226 INFO L87 Difference]: Start difference. First operand 345 states and 437 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-02 20:42:45,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:42:45,345 INFO L93 Difference]: Finished difference Result 361 states and 449 transitions. [2021-05-02 20:42:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 20:42:45,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 89 [2021-05-02 20:42:45,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:42:45,348 INFO L225 Difference]: With dead ends: 361 [2021-05-02 20:42:45,348 INFO L226 Difference]: Without dead ends: 361 [2021-05-02 20:42:45,348 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 20:42:45,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-05-02 20:42:45,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 361. [2021-05-02 20:42:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 246 states have (on average 1.1544715447154472) internal successors, (284), 250 states have internal predecessors, (284), 83 states have call successors, (83), 32 states have call predecessors, (83), 31 states have return successors, (82), 78 states have call predecessors, (82), 82 states have call successors, (82) [2021-05-02 20:42:45,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 449 transitions. [2021-05-02 20:42:45,360 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 449 transitions. Word has length 89 [2021-05-02 20:42:45,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:42:45,361 INFO L480 AbstractCegarLoop]: Abstraction has 361 states and 449 transitions. [2021-05-02 20:42:45,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2021-05-02 20:42:45,361 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 449 transitions. [2021-05-02 20:42:45,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 20:42:45,362 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:42:45,363 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:42:45,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:42:45,586 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:42:45,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:42:45,586 INFO L82 PathProgramCache]: Analyzing trace with hash 352516930, now seen corresponding path program 4 times [2021-05-02 20:42:45,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:42:45,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460089253] [2021-05-02 20:42:45,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:42:45,597 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:42:45,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19282077] [2021-05-02 20:42:45,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:42:45,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 20:42:45,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:42:45,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 20:42:45,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:42:45,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:42:45,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:04,784 WARN L205 SmtUtils]: Spent 19.02 s on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-05-02 20:43:04,787 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:04,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:04,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:04,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,451 WARN L205 SmtUtils]: Spent 5.64 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 20:43:10,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,486 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,488 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,494 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,515 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,530 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,532 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,541 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:10,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,229 WARN L205 SmtUtils]: Spent 5.65 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:43:16,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,277 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,296 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,413 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,432 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,448 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,467 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,470 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,492 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,495 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,581 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,597 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,619 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,655 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,672 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,694 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,810 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,811 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,864 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:43:16,900 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 38 proven. 42 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2021-05-02 20:43:16,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:43:16,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460089253] [2021-05-02 20:43:16,900 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:43:16,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19282077] [2021-05-02 20:43:16,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19282077] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:43:16,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:43:16,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:43:16,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219929879] [2021-05-02 20:43:16,901 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:43:16,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:43:16,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:43:16,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:43:16,903 INFO L87 Difference]: Start difference. First operand 361 states and 449 transitions. Second operand has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 20:43:28,276 WARN L205 SmtUtils]: Spent 11.21 s on a formula simplification that was a NOOP. DAG size: 24 [2021-05-02 20:43:38,085 WARN L205 SmtUtils]: Spent 5.63 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:43:45,863 WARN L205 SmtUtils]: Spent 5.54 s on a formula simplification that was a NOOP. DAG size: 28 [2021-05-02 20:43:57,190 WARN L205 SmtUtils]: Spent 11.20 s on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-05-02 20:44:30,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:44:30,173 INFO L93 Difference]: Finished difference Result 385 states and 483 transitions. [2021-05-02 20:44:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:44:30,173 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) Word has length 103 [2021-05-02 20:44:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:44:30,176 INFO L225 Difference]: With dead ends: 385 [2021-05-02 20:44:30,176 INFO L226 Difference]: Without dead ends: 385 [2021-05-02 20:44:30,176 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 64414.8ms TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-05-02 20:44:30,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-05-02 20:44:30,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 372. [2021-05-02 20:44:30,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 253 states have (on average 1.150197628458498) internal successors, (291), 258 states have internal predecessors, (291), 87 states have call successors, (87), 32 states have call predecessors, (87), 31 states have return successors, (86), 81 states have call predecessors, (86), 86 states have call successors, (86) [2021-05-02 20:44:30,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 464 transitions. [2021-05-02 20:44:30,199 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 464 transitions. Word has length 103 [2021-05-02 20:44:30,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:44:30,199 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 464 transitions. [2021-05-02 20:44:30,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 8 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 8 states have call predecessors, (15), 7 states have call successors, (15) [2021-05-02 20:44:30,199 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 464 transitions. [2021-05-02 20:44:30,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:44:30,201 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:44:30,201 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:44:30,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 20:44:30,409 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:44:30,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:44:30,409 INFO L82 PathProgramCache]: Analyzing trace with hash -521691412, now seen corresponding path program 5 times [2021-05-02 20:44:30,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:44:30,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680158202] [2021-05-02 20:44:30,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:44:30,419 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:44:30,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [13978701] [2021-05-02 20:44:30,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:30,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 20:44:30,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:44:30,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 20:44:30,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:44:30,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,600 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,646 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,683 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,759 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:30,817 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 54 proven. 27 refuted. 0 times theorem prover too weak. 244 trivial. 0 not checked. [2021-05-02 20:44:30,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:44:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680158202] [2021-05-02 20:44:30,817 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:44:30,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13978701] [2021-05-02 20:44:30,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13978701] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:44:30,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:44:30,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 20:44:30,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652906110] [2021-05-02 20:44:30,818 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 20:44:30,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:44:30,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 20:44:30,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 20:44:30,819 INFO L87 Difference]: Start difference. First operand 372 states and 464 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:44:31,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:44:31,352 INFO L93 Difference]: Finished difference Result 550 states and 737 transitions. [2021-05-02 20:44:31,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 20:44:31,353 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 110 [2021-05-02 20:44:31,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:44:31,355 INFO L225 Difference]: With dead ends: 550 [2021-05-02 20:44:31,355 INFO L226 Difference]: Without dead ends: 550 [2021-05-02 20:44:31,355 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 244.9ms TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-05-02 20:44:31,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2021-05-02 20:44:31,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 522. [2021-05-02 20:44:31,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 522 states, 354 states have (on average 1.2090395480225988) internal successors, (428), 356 states have internal predecessors, (428), 136 states have call successors, (136), 32 states have call predecessors, (136), 31 states have return successors, (135), 133 states have call predecessors, (135), 135 states have call successors, (135) [2021-05-02 20:44:31,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 699 transitions. [2021-05-02 20:44:31,371 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 699 transitions. Word has length 110 [2021-05-02 20:44:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:44:31,372 INFO L480 AbstractCegarLoop]: Abstraction has 522 states and 699 transitions. [2021-05-02 20:44:31,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 7 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-05-02 20:44:31,372 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 699 transitions. [2021-05-02 20:44:31,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 20:44:31,373 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:44:31,374 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:44:31,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 20:44:31,577 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:44:31,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:44:31,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1431091588, now seen corresponding path program 6 times [2021-05-02 20:44:31,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:44:31,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820854271] [2021-05-02 20:44:31,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:44:31,584 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:44:31,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067125338] [2021-05-02 20:44:31,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:44:31,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 20:44:31,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 20:44:31,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 63 conjunts are in the unsatisfiable core [2021-05-02 20:44:31,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:44:31,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:31,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:31,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:31,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:31,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:31,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:31,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:31,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:44:53,887 WARN L205 SmtUtils]: Spent 19.00 s on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-05-02 20:45:10,242 WARN L205 SmtUtils]: Spent 16.33 s on a formula simplification that was a NOOP. DAG size: 27 [2021-05-02 20:45:10,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:10,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:10,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:10,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:12,543 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 33 DAG size of output: 26 [2021-05-02 20:45:12,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:12,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:12,800 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:12,804 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:12,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:12,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:12,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:12,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:19,618 WARN L205 SmtUtils]: Spent 6.61 s on a formula simplification that was a NOOP. DAG size: 36 [2021-05-02 20:45:19,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:19,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:19,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:19,670 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:19,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:19,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:19,688 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:19,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,833 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-05-02 20:45:26,834 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,844 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,845 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,873 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,906 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,910 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:26,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,026 WARN L205 SmtUtils]: Spent 358.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 33 [2021-05-02 20:45:58,035 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,039 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,069 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,097 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:45:58,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:04,867 WARN L205 SmtUtils]: Spent 495.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 20:46:23,709 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-05-02 20:46:23,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:23,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:46:24,012 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 67 proven. 84 refuted. 9 times theorem prover too weak. 169 trivial. 0 not checked. [2021-05-02 20:46:24,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:46:24,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820854271] [2021-05-02 20:46:24,013 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:46:24,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067125338] [2021-05-02 20:46:24,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067125338] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:46:24,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:46:24,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-05-02 20:46:24,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536758549] [2021-05-02 20:46:24,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 20:46:24,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:46:24,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 20:46:24,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=281, Unknown=13, NotChecked=0, Total=342 [2021-05-02 20:46:24,015 INFO L87 Difference]: Start difference. First operand 522 states and 699 transitions. Second operand has 19 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 14 states have internal predecessors, (41), 9 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (14), 11 states have call predecessors, (14), 8 states have call successors, (14) [2021-05-02 20:46:46,955 WARN L205 SmtUtils]: Spent 12.02 s on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2021-05-02 20:47:05,141 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-05-02 20:49:13,810 WARN L205 SmtUtils]: Spent 16.17 s on a formula simplification that was a NOOP. DAG size: 45 [2021-05-02 20:50:26,504 WARN L205 SmtUtils]: Spent 11.48 s on a formula simplification that was a NOOP. DAG size: 34