/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/ps5-ll_unwindbound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 22:27:43,897 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 22:27:43,899 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 22:27:43,930 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 22:27:43,931 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 22:27:43,933 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 22:27:43,935 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 22:27:43,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 22:27:43,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 22:27:43,946 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 22:27:43,946 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 22:27:43,947 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 22:27:43,948 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 22:27:43,949 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 22:27:43,950 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 22:27:43,953 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 22:27:43,956 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 22:27:43,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 22:27:43,976 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 22:27:43,981 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 22:27:43,982 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 22:27:43,983 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 22:27:43,984 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 22:27:43,985 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 22:27:43,988 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 22:27:43,989 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 22:27:43,989 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 22:27:43,989 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 22:27:43,990 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 22:27:43,990 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 22:27:43,990 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 22:27:43,991 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 22:27:43,991 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 22:27:43,991 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 22:27:43,992 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 22:27:43,992 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 22:27:43,993 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 22:27:43,993 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 22:27:43,993 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 22:27:43,993 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 22:27:43,994 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 22:27:44,000 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 22:27:44,014 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 22:27:44,014 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 22:27:44,016 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 22:27:44,016 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 22:27:44,016 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 22:27:44,017 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 22:27:44,017 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 22:27:44,017 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 22:27:44,017 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 22:27:44,017 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 22:27:44,018 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 22:27:44,018 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 22:27:44,018 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 22:27:44,018 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 22:27:44,018 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 22:27:44,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 22:27:44,018 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 22:27:44,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 22:27:44,019 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 22:27:44,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 22:27:44,019 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 22:27:44,020 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 22:27:44,020 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 22:27:44,279 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 22:27:44,294 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 22:27:44,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 22:27:44,296 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 22:27:44,297 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 22:27:44,298 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound20.c [2021-05-02 22:27:44,338 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a81e8645c/77faf30e2bb149ef92fb8117d4ed1920/FLAG86a19386f [2021-05-02 22:27:44,689 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 22:27:44,689 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps5-ll_unwindbound20.c [2021-05-02 22:27:44,694 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a81e8645c/77faf30e2bb149ef92fb8117d4ed1920/FLAG86a19386f [2021-05-02 22:27:44,707 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a81e8645c/77faf30e2bb149ef92fb8117d4ed1920 [2021-05-02 22:27:44,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 22:27:44,712 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 22:27:44,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 22:27:44,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 22:27:44,717 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 22:27:44,718 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:27:44" (1/1) ... [2021-05-02 22:27:44,718 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ed553d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:27:44, skipping insertion in model container [2021-05-02 22:27:44,718 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 10:27:44" (1/1) ... [2021-05-02 22:27:44,722 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 22:27:44,733 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 22:27:44,844 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/ps5-ll_unwindbound20.c[458,471] [2021-05-02 22:27:44,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:27:44,871 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 22:27:44,879 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/ps5-ll_unwindbound20.c[458,471] [2021-05-02 22:27:44,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 22:27:44,903 INFO L208 MainTranslator]: Completed translation [2021-05-02 22:27:44,903 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:27:44 WrapperNode [2021-05-02 22:27:44,903 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 22:27:44,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 22:27:44,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 22:27:44,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 22:27:44,951 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:27:44" (1/1) ... [2021-05-02 22:27:44,951 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:27:44" (1/1) ... [2021-05-02 22:27:44,957 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:27:44" (1/1) ... [2021-05-02 22:27:44,958 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:27:44" (1/1) ... [2021-05-02 22:27:44,967 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:27:44" (1/1) ... [2021-05-02 22:27:44,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:27:44" (1/1) ... [2021-05-02 22:27:44,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:27:44" (1/1) ... [2021-05-02 22:27:44,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 22:27:44,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 22:27:44,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 22:27:44,978 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 22:27:44,979 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:27:44" (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 22:27:45,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 22:27:45,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 22:27:45,057 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 22:27:45,057 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 22:27:45,057 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 22:27:45,058 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 22:27:45,058 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 22:27:45,058 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 22:27:45,058 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 22:27:45,058 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 22:27:45,058 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 22:27:45,059 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 22:27:45,059 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 22:27:45,059 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 22:27:45,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 22:27:45,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 22:27:45,059 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 22:27:45,059 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 22:27:45,060 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 22:27:45,060 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 22:27:45,291 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 22:27:45,291 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 22:27:45,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:27:45 BoogieIcfgContainer [2021-05-02 22:27:45,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 22:27:45,292 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 22:27:45,293 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 22:27:45,293 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 22:27:45,295 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:27:45" (1/1) ... [2021-05-02 22:27:45,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:27:45 BasicIcfg [2021-05-02 22:27:45,322 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 22:27:45,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 22:27:45,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 22:27:45,325 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 22:27:45,325 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 10:27:44" (1/4) ... [2021-05-02 22:27:45,325 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732ff4ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:27:45, skipping insertion in model container [2021-05-02 22:27:45,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 10:27:44" (2/4) ... [2021-05-02 22:27:45,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732ff4ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 10:27:45, skipping insertion in model container [2021-05-02 22:27:45,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 10:27:45" (3/4) ... [2021-05-02 22:27:45,326 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@732ff4ab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 10:27:45, skipping insertion in model container [2021-05-02 22:27:45,326 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 10:27:45" (4/4) ... [2021-05-02 22:27:45,327 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound20.cJordan [2021-05-02 22:27:45,330 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 22:27:45,333 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 22:27:45,360 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 22:27:45,389 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 22:27:45,389 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 22:27:45,389 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 22:27:45,389 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 22:27:45,389 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 22:27:45,389 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 22:27:45,389 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 22:27:45,389 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 22:27:45,413 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 22:27:45,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 22:27:45,418 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:27:45,418 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:27:45,418 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:27:45,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:27:45,422 INFO L82 PathProgramCache]: Analyzing trace with hash 843387237, now seen corresponding path program 1 times [2021-05-02 22:27:45,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:27:45,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554587444] [2021-05-02 22:27:45,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:27:45,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:27:45,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 22:27:45,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:27:45,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 22:27:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:27:45,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:27:45,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:27:45,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554587444] [2021-05-02 22:27:45,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554587444] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:27:45,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:27:45,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 22:27:45,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782235241] [2021-05-02 22:27:45,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 22:27:45,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:27:45,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 22:27:45,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:27:45,668 INFO L87 Difference]: Start difference. First operand has 29 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 18 states have internal predecessors, (23), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:27:45,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:27:45,731 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2021-05-02 22:27:45,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 22:27:45,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-02 22:27:45,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:27:45,737 INFO L225 Difference]: With dead ends: 30 [2021-05-02 22:27:45,737 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 22:27:45,738 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 22:27:45,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 22:27:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-05-02 22:27:45,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 15 states have internal predecessors, (17), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:27:45,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 22:27:45,762 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2021-05-02 22:27:45,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:27:45,762 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 22:27:45,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:27:45,763 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 22:27:45,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 22:27:45,764 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:27:45,764 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:27:45,765 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 22:27:45,765 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:27:45,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:27:45,767 INFO L82 PathProgramCache]: Analyzing trace with hash 208087835, now seen corresponding path program 1 times [2021-05-02 22:27:45,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:27:45,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645830626] [2021-05-02 22:27:45,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:27:45,800 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:27:45,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [398665776] [2021-05-02 22:27:45,800 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 22:27:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:27:45,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 22:27:45,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:27:45,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:45,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:45,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:45,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:45,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:46,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:27:46,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:27:46,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645830626] [2021-05-02 22:27:46,009 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:27:46,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398665776] [2021-05-02 22:27:46,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398665776] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:27:46,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:27:46,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 22:27:46,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298247560] [2021-05-02 22:27:46,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 22:27:46,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:27:46,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 22:27:46,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:27:46,012 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:27:46,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:27:46,025 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2021-05-02 22:27:46,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 22:27:46,025 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 18 [2021-05-02 22:27:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:27:46,026 INFO L225 Difference]: With dead ends: 26 [2021-05-02 22:27:46,026 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 22:27:46,026 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 22:27:46,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 22:27:46,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-02 22:27:46,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:27:46,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2021-05-02 22:27:46,036 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 18 [2021-05-02 22:27:46,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:27:46,037 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2021-05-02 22:27:46,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 22:27:46,037 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2021-05-02 22:27:46,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 22:27:46,037 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:27:46,037 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:27:46,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 22:27:46,239 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:27:46,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:27:46,239 INFO L82 PathProgramCache]: Analyzing trace with hash 209190102, now seen corresponding path program 1 times [2021-05-02 22:27:46,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:27:46,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863934077] [2021-05-02 22:27:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:27:46,247 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:27:46,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990080094] [2021-05-02 22:27:46,247 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 22:27:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:27:46,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 22:27:46,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:27:46,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:46,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:27:46,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:27:46,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863934077] [2021-05-02 22:27:46,383 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:27:46,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990080094] [2021-05-02 22:27:46,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990080094] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 22:27:46,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 22:27:46,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 22:27:46,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043598854] [2021-05-02 22:27:46,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 22:27:46,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:27:46,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 22:27:46,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 22:27:46,384 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:27:46,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:27:46,425 INFO L93 Difference]: Finished difference Result 34 states and 39 transitions. [2021-05-02 22:27:46,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 22:27:46,426 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-05-02 22:27:46,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:27:46,426 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:27:46,427 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 22:27:46,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:27:46,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 22:27:46,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 22:27:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:27:46,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2021-05-02 22:27:46,431 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 18 [2021-05-02 22:27:46,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:27:46,431 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2021-05-02 22:27:46,431 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-02 22:27:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2021-05-02 22:27:46,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 22:27:46,432 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:27:46,432 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:27:46,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:27:46,645 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:27:46,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:27:46,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1223799235, now seen corresponding path program 1 times [2021-05-02 22:27:46,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:27:46,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916404990] [2021-05-02 22:27:46,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:27:46,656 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:27:46,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [145942544] [2021-05-02 22:27:46,656 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 22:27:46,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:27:46,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 22:27:46,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:27:46,733 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:46,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:46,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:46,749 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:46,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:46,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:46,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:46,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:46,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:27:46,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:27:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916404990] [2021-05-02 22:27:46,780 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:27:46,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145942544] [2021-05-02 22:27:46,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145942544] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:27:46,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:27:46,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 22:27:46,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495183118] [2021-05-02 22:27:46,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 22:27:46,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:27:46,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 22:27:46,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 22:27:46,782 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:27:46,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:27:46,803 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 22:27:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 22:27:46,820 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2021-05-02 22:27:46,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:27:46,821 INFO L225 Difference]: With dead ends: 34 [2021-05-02 22:27:46,821 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 22:27:46,821 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:27:46,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 22:27:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 22:27:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 22:27:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2021-05-02 22:27:46,824 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 26 [2021-05-02 22:27:46,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:27:46,825 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2021-05-02 22:27:46,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 4 states have call successors, (5), 4 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 22:27:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2021-05-02 22:27:46,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 22:27:46,825 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:27:46,825 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:27:47,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:27:47,043 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:27:47,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:27:47,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1222696968, now seen corresponding path program 1 times [2021-05-02 22:27:47,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:27:47,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137404133] [2021-05-02 22:27:47,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:27:47,058 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:27:47,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1060419876] [2021-05-02 22:27:47,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:27:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:27:47,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 22:27:47,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:27:47,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:27:47,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:27:47,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137404133] [2021-05-02 22:27:47,202 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:27:47,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060419876] [2021-05-02 22:27:47,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060419876] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:27:47,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:27:47,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 22:27:47,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554925351] [2021-05-02 22:27:47,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 22:27:47,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:27:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 22:27:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:27:47,203 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:27:47,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:27:47,278 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 22:27:47,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:27:47,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2021-05-02 22:27:47,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:27:47,280 INFO L225 Difference]: With dead ends: 42 [2021-05-02 22:27:47,280 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 22:27:47,280 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:27:47,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 22:27:47,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 22:27:47,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 28 states have internal predecessors, (30), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:27:47,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-05-02 22:27:47,283 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 26 [2021-05-02 22:27:47,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:27:47,284 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-05-02 22:27:47,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 22:27:47,284 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-05-02 22:27:47,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:27:47,284 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:27:47,285 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:27:47,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:27:47,488 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:27:47,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:27:47,489 INFO L82 PathProgramCache]: Analyzing trace with hash -688312481, now seen corresponding path program 2 times [2021-05-02 22:27:47,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:27:47,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165911845] [2021-05-02 22:27:47,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:27:47,497 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:27:47,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [611446293] [2021-05-02 22:27:47,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:27:47,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:27:47,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:27:47,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 22:27:47,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:27:47,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:47,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:47,579 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:47,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:47,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:47,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:47,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:47,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:47,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:47,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:47,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:47,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 22:27:47,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:27:47,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165911845] [2021-05-02 22:27:47,640 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:27:47,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611446293] [2021-05-02 22:27:47,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611446293] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:27:47,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:27:47,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 22:27:47,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441208341] [2021-05-02 22:27:47,640 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 22:27:47,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:27:47,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 22:27:47,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 22:27:47,641 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:27:47,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:27:47,676 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2021-05-02 22:27:47,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 22:27:47,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) Word has length 34 [2021-05-02 22:27:47,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:27:47,677 INFO L225 Difference]: With dead ends: 50 [2021-05-02 22:27:47,677 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 22:27:47,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 22:27:47,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 22:27:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 22:27:47,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 31 states have internal predecessors, (34), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 22:27:47,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 22:27:47,681 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 34 [2021-05-02 22:27:47,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:27:47,681 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 22:27:47,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 5 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 22:27:47,681 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 22:27:47,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 22:27:47,682 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:27:47,682 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:27:47,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 22:27:47,896 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:27:47,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:27:47,896 INFO L82 PathProgramCache]: Analyzing trace with hash -687210214, now seen corresponding path program 2 times [2021-05-02 22:27:47,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:27:47,896 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380350721] [2021-05-02 22:27:47,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:27:47,903 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:27:47,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1195385625] [2021-05-02 22:27:47,903 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 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 22:27:48,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 22:27:48,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 22:27:48,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2021-05-02 22:27:48,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:27:48,199 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 22:27:48,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:27:48,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380350721] [2021-05-02 22:27:48,200 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:27:48,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195385625] [2021-05-02 22:27:48,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195385625] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:27:48,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:27:48,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 22:27:48,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023070208] [2021-05-02 22:27:48,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 22:27:48,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:27:48,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 22:27:48,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 22:27:48,201 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:27:48,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:27:48,305 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2021-05-02 22:27:48,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 22:27:48,306 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 34 [2021-05-02 22:27:48,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:27:48,306 INFO L225 Difference]: With dead ends: 54 [2021-05-02 22:27:48,306 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 22:27:48,307 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-05-02 22:27:48,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 22:27:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 22:27:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 36 states have internal predecessors, (39), 12 states have call successors, (12), 8 states have call predecessors, (12), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 22:27:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 60 transitions. [2021-05-02 22:27:48,310 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 60 transitions. Word has length 34 [2021-05-02 22:27:48,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:27:48,311 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 60 transitions. [2021-05-02 22:27:48,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 22:27:48,311 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 60 transitions. [2021-05-02 22:27:48,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-02 22:27:48,311 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:27:48,311 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:27:48,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:27:48,517 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:27:48,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:27:48,518 INFO L82 PathProgramCache]: Analyzing trace with hash 96926796, now seen corresponding path program 1 times [2021-05-02 22:27:48,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:27:48,518 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048541364] [2021-05-02 22:27:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:27:48,530 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:27:48,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [778954196] [2021-05-02 22:27:48,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:27:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 22:27:48,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 22:27:48,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 22:27:48,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:48,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:48,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:48,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:48,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:48,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:48,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:48,660 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:48,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:48,669 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:48,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:48,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 22:27:48,694 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 22:27:48,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 22:27:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048541364] [2021-05-02 22:27:48,694 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 22:27:48,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778954196] [2021-05-02 22:27:48,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778954196] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 22:27:48,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 22:27:48,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 22:27:48,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586047245] [2021-05-02 22:27:48,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 22:27:48,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 22:27:48,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 22:27:48,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 22:27:48,695 INFO L87 Difference]: Start difference. First operand 53 states and 60 transitions. Second operand has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 22:27:48,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 22:27:48,759 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2021-05-02 22:27:48,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 22:27:48,759 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) Word has length 37 [2021-05-02 22:27:48,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 22:27:48,760 INFO L225 Difference]: With dead ends: 53 [2021-05-02 22:27:48,760 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 22:27:48,761 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 22:27:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 22:27:48,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-05-02 22:27:48,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 32 states have (on average 1.125) internal successors, (36), 34 states have internal predecessors, (36), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 22:27:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-02 22:27:48,764 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 37 [2021-05-02 22:27:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 22:27:48,764 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-02 22:27:48,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 22:27:48,764 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-02 22:27:48,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 22:27:48,765 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 22:27:48,765 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 22:27:48,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 22:27:48,981 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 22:27:48,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 22:27:48,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1133104769, now seen corresponding path program 3 times [2021-05-02 22:27:48,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 22:27:48,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212153619] [2021-05-02 22:27:48,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 22:27:48,989 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 22:27:48,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1963792703] [2021-05-02 22:27:48,989 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 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