/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/egcd2-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 19:16:21,592 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 19:16:21,594 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 19:16:21,646 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 19:16:21,647 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 19:16:21,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 19:16:21,655 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 19:16:21,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 19:16:21,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 19:16:21,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 19:16:21,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 19:16:21,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 19:16:21,677 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 19:16:21,678 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 19:16:21,679 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 19:16:21,680 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 19:16:21,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 19:16:21,681 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 19:16:21,683 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 19:16:21,684 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 19:16:21,688 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 19:16:21,691 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 19:16:21,695 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 19:16:21,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 19:16:21,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 19:16:21,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 19:16:21,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 19:16:21,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 19:16:21,707 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 19:16:21,708 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 19:16:21,709 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 19:16:21,721 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 19:16:21,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 19:16:21,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 19:16:21,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 19:16:21,724 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 19:16:21,725 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 19:16:21,725 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 19:16:21,725 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 19:16:21,726 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 19:16:21,726 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 19:16:21,727 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 19:16:21,746 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 19:16:21,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 19:16:21,750 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 19:16:21,750 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 19:16:21,750 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 19:16:21,750 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 19:16:21,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 19:16:21,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 19:16:21,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 19:16:21,752 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 19:16:21,753 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 19:16:21,753 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 19:16:21,753 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 19:16:21,753 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 19:16:21,754 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 19:16:21,754 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 19:16:21,754 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 19:16:21,754 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 19:16:21,754 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 19:16:21,754 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 19:16:21,755 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 19:16:21,756 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 19:16:21,756 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 19:16:22,073 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 19:16:22,109 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 19:16:22,112 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 19:16:22,113 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 19:16:22,115 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 19:16:22,116 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2021-05-02 19:16:22,170 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbf8c3be/a4b0ae446dbf4f06a69d6717c7c11c7b/FLAG872882b41 [2021-05-02 19:16:22,686 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 19:16:22,687 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/egcd2-ll.c [2021-05-02 19:16:22,697 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbf8c3be/a4b0ae446dbf4f06a69d6717c7c11c7b/FLAG872882b41 [2021-05-02 19:16:23,168 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8cbf8c3be/a4b0ae446dbf4f06a69d6717c7c11c7b [2021-05-02 19:16:23,174 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 19:16:23,175 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 19:16:23,179 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 19:16:23,179 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 19:16:23,183 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 19:16:23,184 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:16:23" (1/1) ... [2021-05-02 19:16:23,185 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f0a83c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:23, skipping insertion in model container [2021-05-02 19:16:23,185 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 07:16:23" (1/1) ... [2021-05-02 19:16:23,192 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 19:16:23,211 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 19:16:23,316 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/egcd2-ll.c[490,503] [2021-05-02 19:16:23,335 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:16:23,344 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 19:16:23,375 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/egcd2-ll.c[490,503] [2021-05-02 19:16:23,384 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 19:16:23,412 INFO L208 MainTranslator]: Completed translation [2021-05-02 19:16:23,413 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:23 WrapperNode [2021-05-02 19:16:23,413 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 19:16:23,414 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 19:16:23,414 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 19:16:23,414 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 19:16:23,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:23" (1/1) ... [2021-05-02 19:16:23,426 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:23" (1/1) ... [2021-05-02 19:16:23,441 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:23" (1/1) ... [2021-05-02 19:16:23,441 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:23" (1/1) ... [2021-05-02 19:16:23,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:23" (1/1) ... [2021-05-02 19:16:23,458 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:23" (1/1) ... [2021-05-02 19:16:23,459 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:23" (1/1) ... [2021-05-02 19:16:23,461 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 19:16:23,462 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 19:16:23,462 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 19:16:23,462 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 19:16:23,463 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:23" (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 19:16:23,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 19:16:23,545 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 19:16:23,545 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 19:16:23,546 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 19:16:23,546 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 19:16:23,546 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 19:16:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 19:16:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 19:16:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 19:16:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 19:16:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 19:16:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 19:16:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 19:16:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 19:16:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 19:16:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 19:16:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 19:16:23,548 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 19:16:23,549 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 19:16:23,549 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 19:16:23,904 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 19:16:23,905 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 19:16:23,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:16:23 BoogieIcfgContainer [2021-05-02 19:16:23,906 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 19:16:23,907 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 19:16:23,907 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 19:16:23,908 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 19:16:23,917 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:16:23" (1/1) ... [2021-05-02 19:16:23,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:16:23 BasicIcfg [2021-05-02 19:16:23,940 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 19:16:23,942 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 19:16:23,942 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 19:16:23,944 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 19:16:23,944 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 07:16:23" (1/4) ... [2021-05-02 19:16:23,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e7ed9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:16:23, skipping insertion in model container [2021-05-02 19:16:23,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 07:16:23" (2/4) ... [2021-05-02 19:16:23,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e7ed9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 07:16:23, skipping insertion in model container [2021-05-02 19:16:23,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 07:16:23" (3/4) ... [2021-05-02 19:16:23,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20e7ed9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 07:16:23, skipping insertion in model container [2021-05-02 19:16:23,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 07:16:23" (4/4) ... [2021-05-02 19:16:23,949 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll.cJordan [2021-05-02 19:16:23,954 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 19:16:23,959 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 19:16:23,974 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 19:16:24,003 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 19:16:24,003 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 19:16:24,004 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 19:16:24,004 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 19:16:24,004 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 19:16:24,004 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 19:16:24,004 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 19:16:24,004 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 19:16:24,019 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 19:16:24,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 19:16:24,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:24,039 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] [2021-05-02 19:16:24,039 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:24,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:24,045 INFO L82 PathProgramCache]: Analyzing trace with hash -876857705, now seen corresponding path program 1 times [2021-05-02 19:16:24,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:24,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332825836] [2021-05-02 19:16:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:24,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:24,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 19:16:24,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:24,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 19:16:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:24,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 19:16:24,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:24,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 19:16:24,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:24,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 19:16:24,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:24,401 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 19:16:24,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:24,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332825836] [2021-05-02 19:16:24,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332825836] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:16:24,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:16:24,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 19:16:24,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350441122] [2021-05-02 19:16:24,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 19:16:24,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:24,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 19:16:24,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:16:24,428 INFO L87 Difference]: Start difference. First operand has 37 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 21 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) 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, (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 19:16:24,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:24,557 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-02 19:16:24,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 19:16:24,559 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, (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 32 [2021-05-02 19:16:24,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:24,588 INFO L225 Difference]: With dead ends: 37 [2021-05-02 19:16:24,589 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 19:16:24,590 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 19:16:24,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 19:16:24,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-02 19:16:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:16:24,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2021-05-02 19:16:24,621 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 32 [2021-05-02 19:16:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:24,622 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2021-05-02 19:16:24,622 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, (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 19:16:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2021-05-02 19:16:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 19:16:24,624 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:24,624 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 19:16:24,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 19:16:24,624 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:24,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:24,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1858806609, now seen corresponding path program 1 times [2021-05-02 19:16:24,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:24,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598522055] [2021-05-02 19:16:24,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:24,640 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:24,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1608532770] [2021-05-02 19:16:24,641 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 19:16:24,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:24,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:16:24,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:24,826 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:24,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:24,846 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:24,859 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:24,861 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 19:16:24,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:24,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598522055] [2021-05-02 19:16:24,884 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:24,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608532770] [2021-05-02 19:16:24,884 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608532770] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:24,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:24,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 19:16:24,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95417426] [2021-05-02 19:16:24,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 19:16:24,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:24,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 19:16:24,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 19:16:24,887 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:16:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:24,969 INFO L93 Difference]: Finished difference Result 41 states and 55 transitions. [2021-05-02 19:16:24,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:16:24,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 19:16:24,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:24,970 INFO L225 Difference]: With dead ends: 41 [2021-05-02 19:16:24,971 INFO L226 Difference]: Without dead ends: 41 [2021-05-02 19:16:24,971 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.8ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:16:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-05-02 19:16:24,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2021-05-02 19:16:24,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 19:16:24,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 43 transitions. [2021-05-02 19:16:24,979 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 43 transitions. Word has length 33 [2021-05-02 19:16:24,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:24,979 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 43 transitions. [2021-05-02 19:16:24,980 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:16:24,980 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 43 transitions. [2021-05-02 19:16:24,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 19:16:24,980 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:24,981 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, 1] [2021-05-02 19:16:25,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 19:16:25,182 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:25,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:25,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1753102734, now seen corresponding path program 1 times [2021-05-02 19:16:25,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:25,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466935243] [2021-05-02 19:16:25,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:25,194 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:25,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756820190] [2021-05-02 19:16:25,194 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 19:16:25,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:25,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:16:25,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:25,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:25,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:25,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:25,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:25,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:25,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:25,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:25,408 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:25,432 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 19:16:25,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:25,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466935243] [2021-05-02 19:16:25,433 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:25,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756820190] [2021-05-02 19:16:25,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756820190] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:25,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:25,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:16:25,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866197384] [2021-05-02 19:16:25,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:16:25,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:25,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:16:25,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:16:25,435 INFO L87 Difference]: Start difference. First operand 34 states and 43 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:16:25,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:25,671 INFO L93 Difference]: Finished difference Result 52 states and 70 transitions. [2021-05-02 19:16:25,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:16:25,673 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-02 19:16:25,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:25,677 INFO L225 Difference]: With dead ends: 52 [2021-05-02 19:16:25,677 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 19:16:25,678 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 112.0ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:16:25,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 19:16:25,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2021-05-02 19:16:25,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 24 states have internal predecessors, (25), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 19:16:25,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2021-05-02 19:16:25,700 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 34 [2021-05-02 19:16:25,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:25,700 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2021-05-02 19:16:25,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 19:16:25,700 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2021-05-02 19:16:25,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 19:16:25,701 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:25,701 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 19:16:25,929 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:25,929 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:25,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:25,930 INFO L82 PathProgramCache]: Analyzing trace with hash -742626026, now seen corresponding path program 1 times [2021-05-02 19:16:25,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:25,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094229043] [2021-05-02 19:16:25,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:25,946 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:25,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [510023614] [2021-05-02 19:16:25,946 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 19:16:26,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:26,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 19:16:26,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:26,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,059 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,101 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,102 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,114 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,117 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,155 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-02 19:16:26,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:26,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094229043] [2021-05-02 19:16:26,216 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:26,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510023614] [2021-05-02 19:16:26,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510023614] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:26,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:26,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 19:16:26,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080446449] [2021-05-02 19:16:26,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 19:16:26,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:26,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 19:16:26,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:16:26,218 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:16:26,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:26,362 INFO L93 Difference]: Finished difference Result 51 states and 64 transitions. [2021-05-02 19:16:26,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:16:26,364 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-02 19:16:26,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:26,370 INFO L225 Difference]: With dead ends: 51 [2021-05-02 19:16:26,370 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 19:16:26,371 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:16:26,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 19:16:26,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 50. [2021-05-02 19:16:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 29 states have internal predecessors, (31), 17 states have call successors, (17), 6 states have call predecessors, (17), 5 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 19:16:26,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 63 transitions. [2021-05-02 19:16:26,383 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 63 transitions. Word has length 39 [2021-05-02 19:16:26,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:26,384 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 63 transitions. [2021-05-02 19:16:26,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 19:16:26,384 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 63 transitions. [2021-05-02 19:16:26,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 19:16:26,387 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:26,394 INFO L523 BasicCegarLoop]: trace histogram [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 19:16:26,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:26,595 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:26,595 INFO L82 PathProgramCache]: Analyzing trace with hash -2010982190, now seen corresponding path program 1 times [2021-05-02 19:16:26,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:26,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589942432] [2021-05-02 19:16:26,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:26,610 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:26,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [743607353] [2021-05-02 19:16:26,611 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 19:16:26,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:26,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 19:16:26,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:26,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:26,860 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-05-02 19:16:26,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:26,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589942432] [2021-05-02 19:16:26,861 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:26,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743607353] [2021-05-02 19:16:26,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743607353] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:26,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:26,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:16:26,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308789348] [2021-05-02 19:16:26,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:16:26,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:26,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:16:26,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:16:26,863 INFO L87 Difference]: Start difference. First operand 50 states and 63 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:16:26,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:26,988 INFO L93 Difference]: Finished difference Result 55 states and 67 transitions. [2021-05-02 19:16:26,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:16:26,988 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-02 19:16:26,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:26,990 INFO L225 Difference]: With dead ends: 55 [2021-05-02 19:16:26,990 INFO L226 Difference]: Without dead ends: 55 [2021-05-02 19:16:26,990 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:16:26,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-02 19:16:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2021-05-02 19:16:26,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 32 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 19:16:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2021-05-02 19:16:26,996 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 44 [2021-05-02 19:16:26,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:26,996 INFO L480 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2021-05-02 19:16:26,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 6 states have internal predecessors, (19), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-02 19:16:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2021-05-02 19:16:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 19:16:26,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:26,997 INFO L523 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1] [2021-05-02 19:16:27,212 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:27,213 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:27,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:27,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2061823606, now seen corresponding path program 1 times [2021-05-02 19:16:27,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:27,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819018002] [2021-05-02 19:16:27,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:27,223 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:27,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954107501] [2021-05-02 19:16:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:27,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 19:16:27,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:27,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,318 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,431 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,471 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:27,501 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-05-02 19:16:27,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:27,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819018002] [2021-05-02 19:16:27,501 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:27,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954107501] [2021-05-02 19:16:27,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954107501] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:27,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:27,502 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 19:16:27,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631317749] [2021-05-02 19:16:27,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 19:16:27,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:27,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 19:16:27,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:16:27,503 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 19:16:29,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:29,831 INFO L93 Difference]: Finished difference Result 59 states and 70 transitions. [2021-05-02 19:16:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 19:16:29,831 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2021-05-02 19:16:29,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:29,833 INFO L225 Difference]: With dead ends: 59 [2021-05-02 19:16:29,833 INFO L226 Difference]: Without dead ends: 59 [2021-05-02 19:16:29,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 105.3ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:16:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-02 19:16:29,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-02 19:16:29,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 33 states have (on average 1.121212121212121) internal successors, (37), 35 states have internal predecessors, (37), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 19:16:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2021-05-02 19:16:29,846 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 49 [2021-05-02 19:16:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:29,846 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2021-05-02 19:16:29,846 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 19:16:29,847 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2021-05-02 19:16:29,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 19:16:29,847 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:29,848 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:30,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 19:16:30,059 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:30,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:30,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1640738092, now seen corresponding path program 1 times [2021-05-02 19:16:30,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:30,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118022342] [2021-05-02 19:16:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:30,069 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:30,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775838975] [2021-05-02 19:16:30,069 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 19:16:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:30,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 19:16:30,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:30,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,319 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 19:16:30,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:30,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118022342] [2021-05-02 19:16:30,319 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:30,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775838975] [2021-05-02 19:16:30,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775838975] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:30,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:30,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:16:30,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20609845] [2021-05-02 19:16:30,321 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:16:30,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:30,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:16:30,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:16:30,322 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 19:16:30,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:30,462 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2021-05-02 19:16:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 19:16:30,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 56 [2021-05-02 19:16:30,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:30,464 INFO L225 Difference]: With dead ends: 86 [2021-05-02 19:16:30,464 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 19:16:30,464 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 19:16:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 19:16:30,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 76. [2021-05-02 19:16:30,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 41 states have (on average 1.146341463414634) internal successors, (47), 44 states have internal predecessors, (47), 26 states have call successors, (26), 9 states have call predecessors, (26), 8 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2021-05-02 19:16:30,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 97 transitions. [2021-05-02 19:16:30,471 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 97 transitions. Word has length 56 [2021-05-02 19:16:30,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:30,472 INFO L480 AbstractCegarLoop]: Abstraction has 76 states and 97 transitions. [2021-05-02 19:16:30,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.625) internal successors, (21), 7 states have internal predecessors, (21), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2021-05-02 19:16:30,472 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 97 transitions. [2021-05-02 19:16:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 19:16:30,473 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:30,473 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 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, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:30,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:30,683 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:30,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:30,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1928289951, now seen corresponding path program 1 times [2021-05-02 19:16:30,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:30,684 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928062032] [2021-05-02 19:16:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:30,693 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:30,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [142129185] [2021-05-02 19:16:30,693 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 19:16:30,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:30,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 19:16:30,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:30,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,860 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,871 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-05-02 19:16:30,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:30,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928062032] [2021-05-02 19:16:30,907 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:30,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142129185] [2021-05-02 19:16:30,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142129185] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:30,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:30,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 19:16:30,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211600710] [2021-05-02 19:16:30,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 19:16:30,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:30,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 19:16:30,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 19:16:30,909 INFO L87 Difference]: Start difference. First operand 76 states and 97 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 19:16:31,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:31,087 INFO L93 Difference]: Finished difference Result 113 states and 158 transitions. [2021-05-02 19:16:31,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 19:16:31,088 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 58 [2021-05-02 19:16:31,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:31,092 INFO L225 Difference]: With dead ends: 113 [2021-05-02 19:16:31,092 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 19:16:31,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 76.0ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:16:31,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 19:16:31,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 102. [2021-05-02 19:16:31,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 58 states have internal predecessors, (64), 39 states have call successors, (39), 9 states have call predecessors, (39), 8 states have return successors, (37), 34 states have call predecessors, (37), 37 states have call successors, (37) [2021-05-02 19:16:31,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 140 transitions. [2021-05-02 19:16:31,116 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 140 transitions. Word has length 58 [2021-05-02 19:16:31,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:31,116 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 140 transitions. [2021-05-02 19:16:31,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 5 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 19:16:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 140 transitions. [2021-05-02 19:16:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 19:16:31,122 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:31,123 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:31,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:31,337 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:31,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1649820922, now seen corresponding path program 1 times [2021-05-02 19:16:31,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:31,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347163574] [2021-05-02 19:16:31,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:31,356 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:31,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1175438665] [2021-05-02 19:16:31,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 19:16:31,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:31,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-02 19:16:31,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:31,452 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,505 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,517 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,564 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,599 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:31,671 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2021-05-02 19:16:31,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:31,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347163574] [2021-05-02 19:16:31,672 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:31,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175438665] [2021-05-02 19:16:31,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175438665] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:31,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:31,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 19:16:31,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645014558] [2021-05-02 19:16:31,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 19:16:31,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:31,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 19:16:31,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 19:16:31,674 INFO L87 Difference]: Start difference. First operand 102 states and 140 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:16:31,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:31,938 INFO L93 Difference]: Finished difference Result 145 states and 206 transitions. [2021-05-02 19:16:31,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 19:16:31,939 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) Word has length 64 [2021-05-02 19:16:31,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:31,942 INFO L225 Difference]: With dead ends: 145 [2021-05-02 19:16:31,942 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 19:16:31,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:16:31,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 19:16:31,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 141. [2021-05-02 19:16:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 73 states have (on average 1.2054794520547945) internal successors, (88), 80 states have internal predecessors, (88), 58 states have call successors, (58), 10 states have call predecessors, (58), 9 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 19:16:31,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 201 transitions. [2021-05-02 19:16:31,962 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 201 transitions. Word has length 64 [2021-05-02 19:16:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:31,963 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 201 transitions. [2021-05-02 19:16:31,963 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 4 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-02 19:16:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 201 transitions. [2021-05-02 19:16:31,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-02 19:16:31,965 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:31,965 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:32,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 19:16:32,181 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:32,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:32,182 INFO L82 PathProgramCache]: Analyzing trace with hash -385302302, now seen corresponding path program 2 times [2021-05-02 19:16:32,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:32,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942846110] [2021-05-02 19:16:32,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:32,191 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:32,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493326604] [2021-05-02 19:16:32,192 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 19:16:32,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:16:32,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:32,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 47 conjunts are in the unsatisfiable core [2021-05-02 19:16:32,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:32,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,358 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,359 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,374 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,453 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,656 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 17 proven. 28 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-05-02 19:16:32,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:32,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942846110] [2021-05-02 19:16:32,684 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:32,684 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493326604] [2021-05-02 19:16:32,684 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493326604] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:32,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:32,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:16:32,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282348412] [2021-05-02 19:16:32,685 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:16:32,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:32,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:16:32,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:16:32,686 INFO L87 Difference]: Start difference. First operand 141 states and 201 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 19:16:33,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:33,045 INFO L93 Difference]: Finished difference Result 147 states and 206 transitions. [2021-05-02 19:16:33,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:16:33,045 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) Word has length 69 [2021-05-02 19:16:33,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:33,050 INFO L225 Difference]: With dead ends: 147 [2021-05-02 19:16:33,050 INFO L226 Difference]: Without dead ends: 147 [2021-05-02 19:16:33,051 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-05-02 19:16:33,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-05-02 19:16:33,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2021-05-02 19:16:33,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 83 states have internal predecessors, (91), 58 states have call successors, (58), 11 states have call predecessors, (58), 10 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 19:16:33,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 204 transitions. [2021-05-02 19:16:33,068 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 204 transitions. Word has length 69 [2021-05-02 19:16:33,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:33,069 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 204 transitions. [2021-05-02 19:16:33,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 11 states have internal predecessors, (27), 6 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 7 states have call predecessors, (11), 6 states have call successors, (11) [2021-05-02 19:16:33,069 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 204 transitions. [2021-05-02 19:16:33,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 19:16:33,070 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:33,071 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:33,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:33,296 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:33,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:33,297 INFO L82 PathProgramCache]: Analyzing trace with hash -524447642, now seen corresponding path program 3 times [2021-05-02 19:16:33,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:33,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192737589] [2021-05-02 19:16:33,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:33,306 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:33,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [651761263] [2021-05-02 19:16:33,307 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 19:16:33,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:16:33,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 48 conjunts are in the unsatisfiable core [2021-05-02 19:16:33,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:33,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,462 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,537 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,786 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-05-02 19:16:33,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:33,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192737589] [2021-05-02 19:16:33,802 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:33,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651761263] [2021-05-02 19:16:33,802 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651761263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:33,802 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:33,802 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-05-02 19:16:33,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523329390] [2021-05-02 19:16:33,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 19:16:33,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:33,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 19:16:33,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 19:16:33,803 INFO L87 Difference]: Start difference. First operand 145 states and 204 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 19:16:34,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:34,206 INFO L93 Difference]: Finished difference Result 151 states and 209 transitions. [2021-05-02 19:16:34,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:16:34,206 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) Word has length 74 [2021-05-02 19:16:34,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:34,208 INFO L225 Difference]: With dead ends: 151 [2021-05-02 19:16:34,208 INFO L226 Difference]: Without dead ends: 151 [2021-05-02 19:16:34,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 269.3ms TimeCoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:16:34,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-05-02 19:16:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 149. [2021-05-02 19:16:34,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 86 states have internal predecessors, (94), 58 states have call successors, (58), 12 states have call predecessors, (58), 11 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 19:16:34,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 207 transitions. [2021-05-02 19:16:34,216 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 207 transitions. Word has length 74 [2021-05-02 19:16:34,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:34,217 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 207 transitions. [2021-05-02 19:16:34,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (12), 5 states have call predecessors, (12), 5 states have call successors, (12) [2021-05-02 19:16:34,217 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 207 transitions. [2021-05-02 19:16:34,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 19:16:34,218 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:34,218 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:34,432 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:34,433 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:34,433 INFO L82 PathProgramCache]: Analyzing trace with hash -686920602, now seen corresponding path program 2 times [2021-05-02 19:16:34,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:34,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289032126] [2021-05-02 19:16:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:34,451 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:34,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1976064411] [2021-05-02 19:16:34,451 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 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 19:16:34,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:16:34,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:34,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 19:16:34,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:34,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,574 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,575 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,623 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,634 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,645 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,671 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,719 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,720 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:34,789 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 27 proven. 32 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2021-05-02 19:16:34,790 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:34,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289032126] [2021-05-02 19:16:34,790 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:34,790 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976064411] [2021-05-02 19:16:34,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976064411] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:34,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:34,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 19:16:34,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960999390] [2021-05-02 19:16:34,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 19:16:34,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:34,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 19:16:34,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-02 19:16:34,792 INFO L87 Difference]: Start difference. First operand 149 states and 207 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 19:16:35,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:35,210 INFO L93 Difference]: Finished difference Result 169 states and 234 transitions. [2021-05-02 19:16:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 19:16:35,211 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 78 [2021-05-02 19:16:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:35,212 INFO L225 Difference]: With dead ends: 169 [2021-05-02 19:16:35,212 INFO L226 Difference]: Without dead ends: 169 [2021-05-02 19:16:35,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 157.5ms TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-05-02 19:16:35,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-02 19:16:35,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 163. [2021-05-02 19:16:35,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 87 states have (on average 1.1839080459770115) internal successors, (103), 94 states have internal predecessors, (103), 62 states have call successors, (62), 14 states have call predecessors, (62), 13 states have return successors, (59), 54 states have call predecessors, (59), 59 states have call successors, (59) [2021-05-02 19:16:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 224 transitions. [2021-05-02 19:16:35,221 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 224 transitions. Word has length 78 [2021-05-02 19:16:35,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:35,221 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 224 transitions. [2021-05-02 19:16:35,221 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, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 19:16:35,221 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 224 transitions. [2021-05-02 19:16:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 19:16:35,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:35,222 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:35,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 19:16:35,437 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:35,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:35,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1568721063, now seen corresponding path program 1 times [2021-05-02 19:16:35,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:35,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477965858] [2021-05-02 19:16:35,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:35,445 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:35,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809995283] [2021-05-02 19:16:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 19:16:35,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:35,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 61 conjunts are in the unsatisfiable core [2021-05-02 19:16:35,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:35,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,540 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,578 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,641 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,785 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:35,981 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 44 proven. 25 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-02 19:16:35,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:35,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477965858] [2021-05-02 19:16:35,981 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:35,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809995283] [2021-05-02 19:16:35,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809995283] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:35,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:35,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-02 19:16:35,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100239249] [2021-05-02 19:16:35,982 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 19:16:35,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:35,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 19:16:35,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=200, Unknown=0, NotChecked=0, Total=240 [2021-05-02 19:16:35,983 INFO L87 Difference]: Start difference. First operand 163 states and 224 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 19:16:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:36,523 INFO L93 Difference]: Finished difference Result 186 states and 258 transitions. [2021-05-02 19:16:36,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:16:36,524 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) Word has length 80 [2021-05-02 19:16:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:36,525 INFO L225 Difference]: With dead ends: 186 [2021-05-02 19:16:36,525 INFO L226 Difference]: Without dead ends: 185 [2021-05-02 19:16:36,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 369.4ms TimeCoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:16:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2021-05-02 19:16:36,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2021-05-02 19:16:36,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 98 states have (on average 1.183673469387755) internal successors, (116), 106 states have internal predecessors, (116), 71 states have call successors, (71), 15 states have call predecessors, (71), 14 states have return successors, (68), 62 states have call predecessors, (68), 68 states have call successors, (68) [2021-05-02 19:16:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 255 transitions. [2021-05-02 19:16:36,533 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 255 transitions. Word has length 80 [2021-05-02 19:16:36,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:36,534 INFO L480 AbstractCegarLoop]: Abstraction has 184 states and 255 transitions. [2021-05-02 19:16:36,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 7 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (13), 6 states have call predecessors, (13), 6 states have call successors, (13) [2021-05-02 19:16:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 255 transitions. [2021-05-02 19:16:36,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 19:16:36,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:36,535 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:36,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 19:16:36,749 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:36,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:36,750 INFO L82 PathProgramCache]: Analyzing trace with hash 35322646, now seen corresponding path program 4 times [2021-05-02 19:16:36,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:36,750 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045739054] [2021-05-02 19:16:36,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:36,756 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:36,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460775399] [2021-05-02 19:16:36,757 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 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 19:16:36,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:16:36,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:36,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 19:16:36,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:36,896 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:36,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:36,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:36,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:36,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:36,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:36,924 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:36,925 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:36,932 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:36,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:36,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:36,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:36,962 INFO L134 CoverageAnalysis]: Checked inductivity of 205 backedges. 67 proven. 0 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-05-02 19:16:36,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:36,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045739054] [2021-05-02 19:16:36,962 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:36,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460775399] [2021-05-02 19:16:36,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460775399] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 19:16:36,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 19:16:36,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 19:16:36,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117906539] [2021-05-02 19:16:36,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 19:16:36,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:36,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 19:16:36,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-02 19:16:36,964 INFO L87 Difference]: Start difference. First operand 184 states and 255 transitions. Second operand has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 19:16:37,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:37,025 INFO L93 Difference]: Finished difference Result 167 states and 222 transitions. [2021-05-02 19:16:37,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 19:16:37,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 89 [2021-05-02 19:16:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:37,027 INFO L225 Difference]: With dead ends: 167 [2021-05-02 19:16:37,028 INFO L226 Difference]: Without dead ends: 167 [2021-05-02 19:16:37,028 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:16:37,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2021-05-02 19:16:37,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 158. [2021-05-02 19:16:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 92 states have internal predecessors, (95), 58 states have call successors, (58), 15 states have call predecessors, (58), 14 states have return successors, (55), 50 states have call predecessors, (55), 55 states have call successors, (55) [2021-05-02 19:16:37,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 208 transitions. [2021-05-02 19:16:37,035 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 208 transitions. Word has length 89 [2021-05-02 19:16:37,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:37,036 INFO L480 AbstractCegarLoop]: Abstraction has 158 states and 208 transitions. [2021-05-02 19:16:37,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.6) internal successors, (28), 5 states have internal predecessors, (28), 3 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-05-02 19:16:37,036 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 208 transitions. [2021-05-02 19:16:37,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 19:16:37,038 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:37,038 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:37,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 19:16:37,263 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:37,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:37,264 INFO L82 PathProgramCache]: Analyzing trace with hash 17347872, now seen corresponding path program 1 times [2021-05-02 19:16:37,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:37,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270604791] [2021-05-02 19:16:37,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:37,271 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:37,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [630518022] [2021-05-02 19:16:37,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:37,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 19:16:37,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 80 conjunts are in the unsatisfiable core [2021-05-02 19:16:37,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:37,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,440 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,511 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,523 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,627 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,885 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,953 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,964 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,973 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,979 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:37,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:38,029 INFO L134 CoverageAnalysis]: Checked inductivity of 284 backedges. 83 proven. 56 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-05-02 19:16:38,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:38,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270604791] [2021-05-02 19:16:38,030 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:38,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630518022] [2021-05-02 19:16:38,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630518022] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:38,030 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:38,030 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 19:16:38,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964761880] [2021-05-02 19:16:38,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 19:16:38,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:38,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 19:16:38,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:16:38,032 INFO L87 Difference]: Start difference. First operand 158 states and 208 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 19:16:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:44,616 INFO L93 Difference]: Finished difference Result 163 states and 212 transitions. [2021-05-02 19:16:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 19:16:44,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) Word has length 96 [2021-05-02 19:16:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:44,618 INFO L225 Difference]: With dead ends: 163 [2021-05-02 19:16:44,618 INFO L226 Difference]: Without dead ends: 163 [2021-05-02 19:16:44,619 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-05-02 19:16:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-05-02 19:16:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 137. [2021-05-02 19:16:44,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 80 states have internal predecessors, (83), 49 states have call successors, (49), 14 states have call predecessors, (49), 13 states have return successors, (46), 42 states have call predecessors, (46), 46 states have call successors, (46) [2021-05-02 19:16:44,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2021-05-02 19:16:44,625 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 96 [2021-05-02 19:16:44,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:44,625 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2021-05-02 19:16:44,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 7 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 7 states have call predecessors, (16), 7 states have call successors, (16) [2021-05-02 19:16:44,626 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2021-05-02 19:16:44,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 19:16:44,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:44,627 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:44,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:44,849 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:44,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:44,849 INFO L82 PathProgramCache]: Analyzing trace with hash -547052512, now seen corresponding path program 3 times [2021-05-02 19:16:44,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:44,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455852606] [2021-05-02 19:16:44,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:44,856 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:44,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092412013] [2021-05-02 19:16:44,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:44,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 19:16:44,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:44,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 19:16:44,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:44,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:44,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 336 backedges. 61 proven. 10 refuted. 0 times theorem prover too weak. 265 trivial. 0 not checked. [2021-05-02 19:16:45,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:45,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455852606] [2021-05-02 19:16:45,111 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:45,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092412013] [2021-05-02 19:16:45,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092412013] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:45,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:45,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:16:45,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366918009] [2021-05-02 19:16:45,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:16:45,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:45,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:16:45,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:16:45,112 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 19:16:45,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:45,199 INFO L93 Difference]: Finished difference Result 141 states and 181 transitions. [2021-05-02 19:16:45,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 19:16:45,201 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) Word has length 100 [2021-05-02 19:16:45,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:45,202 INFO L225 Difference]: With dead ends: 141 [2021-05-02 19:16:45,202 INFO L226 Difference]: Without dead ends: 141 [2021-05-02 19:16:45,203 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 19:16:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-02 19:16:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2021-05-02 19:16:45,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 83 states have internal predecessors, (86), 49 states have call successors, (49), 15 states have call predecessors, (49), 14 states have return successors, (46), 42 states have call predecessors, (46), 46 states have call successors, (46) [2021-05-02 19:16:45,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 181 transitions. [2021-05-02 19:16:45,211 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 181 transitions. Word has length 100 [2021-05-02 19:16:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:45,211 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 181 transitions. [2021-05-02 19:16:45,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 2 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 2 states have call predecessors, (13), 2 states have call successors, (13) [2021-05-02 19:16:45,211 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 181 transitions. [2021-05-02 19:16:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 19:16:45,212 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:45,212 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 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 19:16:45,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:45,413 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:45,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:45,413 INFO L82 PathProgramCache]: Analyzing trace with hash -299472749, now seen corresponding path program 2 times [2021-05-02 19:16:45,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:45,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651291300] [2021-05-02 19:16:45,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:45,421 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:45,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1176723976] [2021-05-02 19:16:45,421 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:45,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:16:45,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:45,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 54 conjunts are in the unsatisfiable core [2021-05-02 19:16:45,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:45,522 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,687 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,825 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,827 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,856 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:45,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 332 backedges. 47 proven. 39 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2021-05-02 19:16:46,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:46,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651291300] [2021-05-02 19:16:46,034 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:46,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176723976] [2021-05-02 19:16:46,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176723976] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:46,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:46,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 19:16:46,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566146766] [2021-05-02 19:16:46,038 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 19:16:46,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:46,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 19:16:46,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:16:46,039 INFO L87 Difference]: Start difference. First operand 141 states and 181 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-05-02 19:16:46,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:46,674 INFO L93 Difference]: Finished difference Result 169 states and 223 transitions. [2021-05-02 19:16:46,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 19:16:46,675 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) Word has length 102 [2021-05-02 19:16:46,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:46,676 INFO L225 Difference]: With dead ends: 169 [2021-05-02 19:16:46,676 INFO L226 Difference]: Without dead ends: 168 [2021-05-02 19:16:46,677 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 419.2ms TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2021-05-02 19:16:46,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-02 19:16:46,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 166. [2021-05-02 19:16:46,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 89 states have (on average 1.1235955056179776) internal successors, (100), 95 states have internal predecessors, (100), 61 states have call successors, (61), 16 states have call predecessors, (61), 15 states have return successors, (58), 54 states have call predecessors, (58), 58 states have call successors, (58) [2021-05-02 19:16:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 219 transitions. [2021-05-02 19:16:46,683 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 219 transitions. Word has length 102 [2021-05-02 19:16:46,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:46,683 INFO L480 AbstractCegarLoop]: Abstraction has 166 states and 219 transitions. [2021-05-02 19:16:46,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 8 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (17), 6 states have call predecessors, (17), 7 states have call successors, (17) [2021-05-02 19:16:46,684 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 219 transitions. [2021-05-02 19:16:46,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-05-02 19:16:46,685 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:46,685 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:46,901 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:46,901 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:46,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2029103255, now seen corresponding path program 3 times [2021-05-02 19:16:46,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:46,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125008659] [2021-05-02 19:16:46,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:46,909 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:46,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1593627112] [2021-05-02 19:16:46,909 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:46,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:16:46,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:46,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 19:16:46,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:47,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,058 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,113 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,115 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,126 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,127 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,136 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,158 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,159 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,168 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 337 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 19:16:47,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:47,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125008659] [2021-05-02 19:16:47,193 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:47,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593627112] [2021-05-02 19:16:47,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593627112] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:47,193 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:47,193 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 19:16:47,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007931626] [2021-05-02 19:16:47,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 19:16:47,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:47,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 19:16:47,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 19:16:47,194 INFO L87 Difference]: Start difference. First operand 166 states and 219 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-02 19:16:47,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:47,411 INFO L93 Difference]: Finished difference Result 204 states and 287 transitions. [2021-05-02 19:16:47,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 19:16:47,411 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) Word has length 105 [2021-05-02 19:16:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:47,413 INFO L225 Difference]: With dead ends: 204 [2021-05-02 19:16:47,413 INFO L226 Difference]: Without dead ends: 204 [2021-05-02 19:16:47,413 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:16:47,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-02 19:16:47,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 185. [2021-05-02 19:16:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 96 states have (on average 1.15625) internal successors, (111), 98 states have internal predecessors, (111), 73 states have call successors, (73), 16 states have call predecessors, (73), 15 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2021-05-02 19:16:47,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 254 transitions. [2021-05-02 19:16:47,420 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 254 transitions. Word has length 105 [2021-05-02 19:16:47,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:47,421 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 254 transitions. [2021-05-02 19:16:47,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 4 states have call successors, (19), 2 states have call predecessors, (19), 1 states have return successors, (17), 3 states have call predecessors, (17), 3 states have call successors, (17) [2021-05-02 19:16:47,421 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 254 transitions. [2021-05-02 19:16:47,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-05-02 19:16:47,422 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:47,422 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:47,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-05-02 19:16:47,629 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:47,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:47,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1784247376, now seen corresponding path program 2 times [2021-05-02 19:16:47,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:47,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940146353] [2021-05-02 19:16:47,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:47,638 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:47,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090150468] [2021-05-02 19:16:47,638 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:47,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 19:16:47,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:47,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 36 conjunts are in the unsatisfiable core [2021-05-02 19:16:47,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:47,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,831 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,892 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,913 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,947 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,955 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,977 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,988 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:47,993 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,004 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,005 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,006 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,065 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,067 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,068 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,080 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,161 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:48,232 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 57 proven. 48 refuted. 0 times theorem prover too weak. 291 trivial. 0 not checked. [2021-05-02 19:16:48,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:48,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940146353] [2021-05-02 19:16:48,233 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:48,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090150468] [2021-05-02 19:16:48,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090150468] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:48,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:48,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-05-02 19:16:48,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385460258] [2021-05-02 19:16:48,234 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 19:16:48,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:48,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 19:16:48,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-02 19:16:48,234 INFO L87 Difference]: Start difference. First operand 185 states and 254 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-02 19:16:50,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:50,244 INFO L93 Difference]: Finished difference Result 258 states and 370 transitions. [2021-05-02 19:16:50,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 19:16:50,244 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) Word has length 111 [2021-05-02 19:16:50,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:50,246 INFO L225 Difference]: With dead ends: 258 [2021-05-02 19:16:50,246 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 19:16:50,247 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 852.9ms TimeCoverageRelationStatistics Valid=318, Invalid=1488, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 19:16:50,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 19:16:50,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 252. [2021-05-02 19:16:50,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 126 states have (on average 1.1746031746031746) internal successors, (148), 128 states have internal predecessors, (148), 109 states have call successors, (109), 17 states have call predecessors, (109), 16 states have return successors, (106), 106 states have call predecessors, (106), 106 states have call successors, (106) [2021-05-02 19:16:50,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 363 transitions. [2021-05-02 19:16:50,256 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 363 transitions. Word has length 111 [2021-05-02 19:16:50,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:50,257 INFO L480 AbstractCegarLoop]: Abstraction has 252 states and 363 transitions. [2021-05-02 19:16:50,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 15 states have internal predecessors, (34), 8 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 8 states have call predecessors, (18), 8 states have call successors, (18) [2021-05-02 19:16:50,257 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 363 transitions. [2021-05-02 19:16:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 19:16:50,258 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:50,258 INFO L523 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:50,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-05-02 19:16:50,473 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:50,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:50,473 INFO L82 PathProgramCache]: Analyzing trace with hash -527743528, now seen corresponding path program 3 times [2021-05-02 19:16:50,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:50,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536501134] [2021-05-02 19:16:50,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:50,480 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:50,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2139235417] [2021-05-02 19:16:50,481 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:50,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 19:16:50,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:50,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 68 conjunts are in the unsatisfiable core [2021-05-02 19:16:50,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:50,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,829 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,967 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:50,986 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:51,003 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 66 proven. 38 refuted. 0 times theorem prover too weak. 349 trivial. 0 not checked. [2021-05-02 19:16:51,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:51,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536501134] [2021-05-02 19:16:51,003 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:51,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139235417] [2021-05-02 19:16:51,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139235417] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:51,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:51,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 19:16:51,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557433453] [2021-05-02 19:16:51,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 19:16:51,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:51,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 19:16:51,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-05-02 19:16:51,005 INFO L87 Difference]: Start difference. First operand 252 states and 363 transitions. Second operand has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 19:16:51,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:51,677 INFO L93 Difference]: Finished difference Result 292 states and 413 transitions. [2021-05-02 19:16:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 19:16:51,678 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) Word has length 116 [2021-05-02 19:16:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:51,679 INFO L225 Difference]: With dead ends: 292 [2021-05-02 19:16:51,680 INFO L226 Difference]: Without dead ends: 292 [2021-05-02 19:16:51,680 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 406.1ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-05-02 19:16:51,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-02 19:16:51,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 289. [2021-05-02 19:16:51,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 147 states have (on average 1.163265306122449) internal successors, (171), 149 states have internal predecessors, (171), 121 states have call successors, (121), 21 states have call predecessors, (121), 20 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2021-05-02 19:16:51,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 410 transitions. [2021-05-02 19:16:51,691 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 410 transitions. Word has length 116 [2021-05-02 19:16:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:51,691 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 410 transitions. [2021-05-02 19:16:51,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 2.2142857142857144) internal successors, (31), 13 states have internal predecessors, (31), 7 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 6 states have call successors, (19) [2021-05-02 19:16:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 410 transitions. [2021-05-02 19:16:51,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 19:16:51,693 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:51,693 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 19:16:51,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-02 19:16:51,917 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:51,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:51,917 INFO L82 PathProgramCache]: Analyzing trace with hash -391499174, now seen corresponding path program 4 times [2021-05-02 19:16:51,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:51,918 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372638801] [2021-05-02 19:16:51,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:51,924 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:51,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988828282] [2021-05-02 19:16:51,924 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 19:16:52,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 19:16:52,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 19:16:52,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 83 conjunts are in the unsatisfiable core [2021-05-02 19:16:52,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 19:16:52,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,030 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,072 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,073 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,082 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,131 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,142 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,143 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,153 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,154 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,227 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,228 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,382 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,449 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,461 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,476 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,662 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 19:16:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 509 backedges. 111 proven. 125 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2021-05-02 19:16:52,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 19:16:52,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372638801] [2021-05-02 19:16:52,694 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 19:16:52,694 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988828282] [2021-05-02 19:16:52,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988828282] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 19:16:52,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 19:16:52,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 19:16:52,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435753726] [2021-05-02 19:16:52,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 19:16:52,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 19:16:52,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 19:16:52,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-05-02 19:16:52,696 INFO L87 Difference]: Start difference. First operand 289 states and 410 transitions. Second operand has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-05-02 19:16:57,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 19:16:57,520 INFO L93 Difference]: Finished difference Result 303 states and 421 transitions. [2021-05-02 19:16:57,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 19:16:57,521 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) Word has length 118 [2021-05-02 19:16:57,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 19:16:57,523 INFO L225 Difference]: With dead ends: 303 [2021-05-02 19:16:57,523 INFO L226 Difference]: Without dead ends: 303 [2021-05-02 19:16:57,523 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 98 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 496.1ms TimeCoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2021-05-02 19:16:57,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-05-02 19:16:57,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 301. [2021-05-02 19:16:57,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 156 states have (on average 1.1538461538461537) internal successors, (180), 158 states have internal predecessors, (180), 121 states have call successors, (121), 24 states have call predecessors, (121), 23 states have return successors, (118), 118 states have call predecessors, (118), 118 states have call successors, (118) [2021-05-02 19:16:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 419 transitions. [2021-05-02 19:16:57,533 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 419 transitions. Word has length 118 [2021-05-02 19:16:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 19:16:57,534 INFO L480 AbstractCegarLoop]: Abstraction has 301 states and 419 transitions. [2021-05-02 19:16:57,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 13 states have internal predecessors, (31), 9 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (20), 8 states have call predecessors, (20), 9 states have call successors, (20) [2021-05-02 19:16:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 419 transitions. [2021-05-02 19:16:57,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-05-02 19:16:57,535 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 19:16:57,536 INFO L523 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 4, 4, 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] [2021-05-02 19:16:57,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-05-02 19:16:57,736 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 19:16:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 19:16:57,737 INFO L82 PathProgramCache]: Analyzing trace with hash 771077424, now seen corresponding path program 5 times [2021-05-02 19:16:57,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 19:16:57,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992880396] [2021-05-02 19:16:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 19:16:57,743 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 19:16:57,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1048033176] [2021-05-02 19:16:57,743 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true