/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerCTransformed.xml -s ../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 08:16:46,398 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 08:16:46,400 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 08:16:46,426 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-06 08:16:46,426 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-06 08:16:46,429 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-06 08:16:46,431 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-06 08:16:46,433 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-06 08:16:46,434 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-06 08:16:46,435 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-06 08:16:46,436 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-06 08:16:46,437 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-06 08:16:46,437 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 08:16:46,438 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 08:16:46,438 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 08:16:46,439 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 08:16:46,440 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 08:16:46,440 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 08:16:46,442 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 08:16:46,458 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 08:16:46,459 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 08:16:46,461 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 08:16:46,462 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 08:16:46,462 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 08:16:46,464 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-06 08:16:46,464 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-06 08:16:46,464 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-06 08:16:46,465 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-06 08:16:46,465 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-06 08:16:46,466 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-06 08:16:46,466 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-06 08:16:46,467 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-06 08:16:46,467 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-06 08:16:46,468 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-06 08:16:46,468 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-06 08:16:46,468 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-06 08:16:46,469 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-06 08:16:46,469 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-06 08:16:46,469 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 08:16:46,470 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 08:16:46,470 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 08:16:46,473 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-06 08:16:46,488 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 08:16:46,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 08:16:46,490 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 08:16:46,490 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 08:16:46,490 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 08:16:46,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 08:16:46,491 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 08:16:46,491 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 08:16:46,491 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 08:16:46,491 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 08:16:46,492 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 08:16:46,492 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 08:16:46,492 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 08:16:46,492 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 08:16:46,492 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 08:16:46,492 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 08:16:46,492 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-06 08:16:46,493 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 08:16:46,493 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 08:16:46,493 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 08:16:46,493 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 08:16:46,494 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-06 08:16:46,494 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 08:16:46,754 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 08:16:46,767 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 08:16:46,768 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 08:16:46,769 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 08:16:46,769 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 08:16:46,770 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c [2021-05-06 08:16:46,816 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91b5d7086/780c64adbb7546458c8caad5ae239038/FLAG9e8d19236 [2021-05-06 08:16:47,162 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 08:16:47,163 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c [2021-05-06 08:16:47,173 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91b5d7086/780c64adbb7546458c8caad5ae239038/FLAG9e8d19236 [2021-05-06 08:16:47,599 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/91b5d7086/780c64adbb7546458c8caad5ae239038 [2021-05-06 08:16:47,601 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 08:16:47,603 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-06 08:16:47,606 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 08:16:47,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 08:16:47,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 08:16:47,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:16:47" (1/1) ... [2021-05-06 08:16:47,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@344a3afa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:47, skipping insertion in model container [2021-05-06 08:16:47,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 08:16:47" (1/1) ... [2021-05-06 08:16:47,616 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 08:16:47,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 08:16:47,704 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c[490,503] [2021-05-06 08:16:47,715 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:16:47,720 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 08:16:47,727 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/egcd2-ll_valuebound1.c[490,503] [2021-05-06 08:16:47,733 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 08:16:47,741 INFO L208 MainTranslator]: Completed translation [2021-05-06 08:16:47,742 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:47 WrapperNode [2021-05-06 08:16:47,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 08:16:47,742 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 08:16:47,742 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 08:16:47,743 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 08:16:47,749 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:47" (1/1) ... [2021-05-06 08:16:47,749 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:47" (1/1) ... [2021-05-06 08:16:47,754 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:47" (1/1) ... [2021-05-06 08:16:47,754 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:47" (1/1) ... [2021-05-06 08:16:47,774 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:47" (1/1) ... [2021-05-06 08:16:47,793 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:47" (1/1) ... [2021-05-06 08:16:47,794 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:47" (1/1) ... [2021-05-06 08:16:47,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 08:16:47,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 08:16:47,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 08:16:47,796 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 08:16:47,797 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:47" (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 [2021-05-06 08:16:47,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 08:16:47,867 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 08:16:47,867 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 08:16:47,867 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 08:16:47,867 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 08:16:47,867 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 08:16:47,867 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 08:16:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 08:16:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 08:16:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 08:16:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 08:16:47,868 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 08:16:47,869 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 08:16:47,869 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 08:16:47,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 08:16:47,869 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 08:16:47,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 08:16:47,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 08:16:47,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 08:16:47,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 08:16:48,070 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 08:16:48,070 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-06 08:16:48,071 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:16:48 BoogieIcfgContainer [2021-05-06 08:16:48,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 08:16:48,071 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-06 08:16:48,072 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-06 08:16:48,072 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-06 08:16:48,074 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:16:48" (1/1) ... [2021-05-06 08:16:48,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:16:48 BasicIcfg [2021-05-06 08:16:48,097 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-06 08:16:48,098 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 08:16:48,098 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 08:16:48,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 08:16:48,100 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 08:16:47" (1/4) ... [2021-05-06 08:16:48,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365a7318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:16:48, skipping insertion in model container [2021-05-06 08:16:48,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 08:16:47" (2/4) ... [2021-05-06 08:16:48,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365a7318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 08:16:48, skipping insertion in model container [2021-05-06 08:16:48,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 08:16:48" (3/4) ... [2021-05-06 08:16:48,101 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@365a7318 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:16:48, skipping insertion in model container [2021-05-06 08:16:48,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 06.05 08:16:48" (4/4) ... [2021-05-06 08:16:48,102 INFO L111 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound1.cJordan [2021-05-06 08:16:48,105 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-06 08:16:48,108 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 08:16:48,118 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 08:16:48,143 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 08:16:48,144 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-06 08:16:48,144 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-06 08:16:48,144 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 08:16:48,144 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 08:16:48,144 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 08:16:48,144 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 08:16:48,144 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 08:16:48,154 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 08:16:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-06 08:16:48,159 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:48,159 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-06 08:16:48,160 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:48,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:48,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1630657446, now seen corresponding path program 1 times [2021-05-06 08:16:48,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:48,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578493938] [2021-05-06 08:16:48,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:48,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 08:16:48,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:48,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 08:16:48,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:48,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-06 08:16:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:48,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-06 08:16:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:48,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-06 08:16:48,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:48,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-05-06 08:16:48,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:48,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-06 08:16:48,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:48,463 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:16:48,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:48,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578493938] [2021-05-06 08:16:48,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578493938] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 08:16:48,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 08:16:48,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 08:16:48,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116011774] [2021-05-06 08:16:48,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 08:16:48,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:48,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 08:16:48,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:16:48,483 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 1.45) internal successors, (29), 22 states have internal predecessors, (29), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:16:48,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:48,636 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2021-05-06 08:16:48,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 08:16:48,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 43 [2021-05-06 08:16:48,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:48,643 INFO L225 Difference]: With dead ends: 40 [2021-05-06 08:16:48,643 INFO L226 Difference]: Without dead ends: 35 [2021-05-06 08:16:48,644 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 08:16:48,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-06 08:16:48,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-06 08:16:48,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:16:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 46 transitions. [2021-05-06 08:16:48,672 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 46 transitions. Word has length 43 [2021-05-06 08:16:48,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:48,672 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 46 transitions. [2021-05-06 08:16:48,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:16:48,673 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 46 transitions. [2021-05-06 08:16:48,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 08:16:48,674 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:48,674 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-06 08:16:48,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 08:16:48,675 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:48,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:48,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1790145708, now seen corresponding path program 1 times [2021-05-06 08:16:48,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:48,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186877114] [2021-05-06 08:16:48,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:48,691 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:48,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1371473484] [2021-05-06 08:16:48,692 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 [2021-05-06 08:16:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:48,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 08:16:48,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:48,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:48,954 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:48,956 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:48,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:48,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:48,997 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:16:48,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:48,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186877114] [2021-05-06 08:16:48,998 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:48,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371473484] [2021-05-06 08:16:48,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371473484] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:48,998 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:48,998 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 08:16:48,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96578213] [2021-05-06 08:16:48,999 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 08:16:48,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:48,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 08:16:49,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 08:16:49,000 INFO L87 Difference]: Start difference. First operand 35 states and 46 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:16:49,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:49,091 INFO L93 Difference]: Finished difference Result 44 states and 60 transitions. [2021-05-06 08:16:49,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 08:16:49,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 44 [2021-05-06 08:16:49,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:49,094 INFO L225 Difference]: With dead ends: 44 [2021-05-06 08:16:49,094 INFO L226 Difference]: Without dead ends: 44 [2021-05-06 08:16:49,094 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 24.2ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:16:49,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-06 08:16:49,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 37. [2021-05-06 08:16:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 08:16:49,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 48 transitions. [2021-05-06 08:16:49,100 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 48 transitions. Word has length 44 [2021-05-06 08:16:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:49,100 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 48 transitions. [2021-05-06 08:16:49,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:16:49,101 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 48 transitions. [2021-05-06 08:16:49,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-05-06 08:16:49,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:49,101 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-06 08:16:49,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-06 08:16:49,317 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:49,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:49,317 INFO L82 PathProgramCache]: Analyzing trace with hash 375385207, now seen corresponding path program 1 times [2021-05-06 08:16:49,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:49,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784738049] [2021-05-06 08:16:49,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:49,328 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:49,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532347453] [2021-05-06 08:16:49,328 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 [2021-05-06 08:16:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:49,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:16:49,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:49,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:49,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:49,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:49,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:49,501 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:49,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:49,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:49,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:49,545 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-06 08:16:49,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:49,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784738049] [2021-05-06 08:16:49,545 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:49,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532347453] [2021-05-06 08:16:49,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532347453] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:49,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:49,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:16:49,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172049787] [2021-05-06 08:16:49,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:16:49,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:49,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:16:49,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:16:49,547 INFO L87 Difference]: Start difference. First operand 37 states and 48 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:16:49,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:49,698 INFO L93 Difference]: Finished difference Result 55 states and 75 transitions. [2021-05-06 08:16:49,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:16:49,698 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 45 [2021-05-06 08:16:49,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:49,709 INFO L225 Difference]: With dead ends: 55 [2021-05-06 08:16:49,710 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 08:16:49,710 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 71.2ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:16:49,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 08:16:49,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-05-06 08:16:49,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 15 states have call successors, (15), 5 states have call predecessors, (15), 4 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 08:16:49,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 54 transitions. [2021-05-06 08:16:49,726 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 54 transitions. Word has length 45 [2021-05-06 08:16:49,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:49,726 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 54 transitions. [2021-05-06 08:16:49,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 7 states have internal predecessors, (17), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-06 08:16:49,727 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 54 transitions. [2021-05-06 08:16:49,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-06 08:16:49,729 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:49,729 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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] [2021-05-06 08:16:49,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:49,945 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:49,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:49,945 INFO L82 PathProgramCache]: Analyzing trace with hash -788787523, now seen corresponding path program 1 times [2021-05-06 08:16:49,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:49,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082906211] [2021-05-06 08:16:49,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:49,956 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:49,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1756156742] [2021-05-06 08:16:49,957 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 [2021-05-06 08:16:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:50,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-06 08:16:50,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:50,054 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,057 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,091 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,125 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,130 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,185 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,205 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,232 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,237 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,263 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,275 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,286 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 2 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-05-06 08:16:50,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:50,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082906211] [2021-05-06 08:16:50,287 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:50,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756156742] [2021-05-06 08:16:50,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756156742] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:50,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:50,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:16:50,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649261585] [2021-05-06 08:16:50,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:16:50,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:50,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:16:50,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:16:50,291 INFO L87 Difference]: Start difference. First operand 43 states and 54 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-06 08:16:50,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:50,403 INFO L93 Difference]: Finished difference Result 54 states and 69 transitions. [2021-05-06 08:16:50,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 08:16:50,404 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) Word has length 50 [2021-05-06 08:16:50,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:50,406 INFO L225 Difference]: With dead ends: 54 [2021-05-06 08:16:50,406 INFO L226 Difference]: Without dead ends: 54 [2021-05-06 08:16:50,406 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-05-06 08:16:50,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-06 08:16:50,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-06 08:16:50,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 30 states have internal predecessors, (32), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:16:50,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 68 transitions. [2021-05-06 08:16:50,411 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 68 transitions. Word has length 50 [2021-05-06 08:16:50,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:50,411 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 68 transitions. [2021-05-06 08:16:50,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 6 states have call predecessors, (8), 5 states have call successors, (8) [2021-05-06 08:16:50,411 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 68 transitions. [2021-05-06 08:16:50,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-06 08:16:50,412 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:50,412 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1] [2021-05-06 08:16:50,617 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:50,617 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:50,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:50,618 INFO L82 PathProgramCache]: Analyzing trace with hash -735644649, now seen corresponding path program 1 times [2021-05-06 08:16:50,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:50,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100808609] [2021-05-06 08:16:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:50,659 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:50,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2136169919] [2021-05-06 08:16:50,659 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 [2021-05-06 08:16:50,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:50,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:16:50,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:50,808 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,809 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,912 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,927 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,940 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,948 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:50,957 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 13 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 08:16:50,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:50,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100808609] [2021-05-06 08:16:50,958 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:50,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136169919] [2021-05-06 08:16:50,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136169919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:50,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:50,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:16:50,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712614563] [2021-05-06 08:16:50,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:16:50,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:50,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:16:50,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:16:50,960 INFO L87 Difference]: Start difference. First operand 53 states and 68 transitions. Second operand has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:16:51,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:51,054 INFO L93 Difference]: Finished difference Result 58 states and 72 transitions. [2021-05-06 08:16:51,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-06 08:16:51,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 55 [2021-05-06 08:16:51,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:51,058 INFO L225 Difference]: With dead ends: 58 [2021-05-06 08:16:51,058 INFO L226 Difference]: Without dead ends: 58 [2021-05-06 08:16:51,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 44.3ms TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:16:51,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-06 08:16:51,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-06 08:16:51,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 33 states have internal predecessors, (35), 19 states have call successors, (19), 7 states have call predecessors, (19), 6 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:16:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 71 transitions. [2021-05-06 08:16:51,062 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 71 transitions. Word has length 55 [2021-05-06 08:16:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:51,062 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 71 transitions. [2021-05-06 08:16:51,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.5) internal successors, (20), 6 states have internal predecessors, (20), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-06 08:16:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 71 transitions. [2021-05-06 08:16:51,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-06 08:16:51,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:51,063 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 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, 1, 1, 1, 1, 1] [2021-05-06 08:16:51,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:51,264 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:51,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:51,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1700404515, now seen corresponding path program 1 times [2021-05-06 08:16:51,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:51,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478478988] [2021-05-06 08:16:51,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:51,274 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:51,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1754299895] [2021-05-06 08:16:51,274 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 [2021-05-06 08:16:51,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:51,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-06 08:16:51,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:51,356 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,357 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,364 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,386 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-05-06 08:16:51,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:51,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478478988] [2021-05-06 08:16:51,493 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:51,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754299895] [2021-05-06 08:16:51,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754299895] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:51,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:51,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 08:16:51,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598870819] [2021-05-06 08:16:51,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 08:16:51,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:51,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 08:16:51,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:16:51,495 INFO L87 Difference]: Start difference. First operand 57 states and 71 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-05-06 08:16:51,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:51,661 INFO L93 Difference]: Finished difference Result 64 states and 77 transitions. [2021-05-06 08:16:51,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:16:51,661 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 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 60 [2021-05-06 08:16:51,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:51,665 INFO L225 Difference]: With dead ends: 64 [2021-05-06 08:16:51,665 INFO L226 Difference]: Without dead ends: 64 [2021-05-06 08:16:51,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-06 08:16:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-06 08:16:51,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-05-06 08:16:51,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 36 states have internal predecessors, (38), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 08:16:51,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2021-05-06 08:16:51,676 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 60 [2021-05-06 08:16:51,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:51,676 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2021-05-06 08:16:51,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 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) [2021-05-06 08:16:51,676 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2021-05-06 08:16:51,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-05-06 08:16:51,677 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:51,677 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1] [2021-05-06 08:16:51,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-06 08:16:51,893 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:51,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:51,893 INFO L82 PathProgramCache]: Analyzing trace with hash 14033329, now seen corresponding path program 1 times [2021-05-06 08:16:51,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:51,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834449390] [2021-05-06 08:16:51,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:51,909 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:51,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642557424] [2021-05-06 08:16:51,909 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 [2021-05-06 08:16:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:51,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 08:16:51,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:52,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,010 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,025 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,026 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,064 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,066 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,076 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,077 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,086 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,093 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,121 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,141 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-06 08:16:52,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:52,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834449390] [2021-05-06 08:16:52,141 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:52,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642557424] [2021-05-06 08:16:52,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642557424] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:52,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:52,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:16:52,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174110233] [2021-05-06 08:16:52,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:16:52,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:52,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:16:52,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:16:52,144 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 8 states have internal predecessors, (22), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:16:52,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:52,319 INFO L93 Difference]: Finished difference Result 78 states and 99 transitions. [2021-05-06 08:16:52,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:16:52,319 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 67 [2021-05-06 08:16:52,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:52,320 INFO L225 Difference]: With dead ends: 78 [2021-05-06 08:16:52,320 INFO L226 Difference]: Without dead ends: 78 [2021-05-06 08:16:52,321 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-05-06 08:16:52,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-06 08:16:52,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 71. [2021-05-06 08:16:52,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 41 states have internal predecessors, (44), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:16:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2021-05-06 08:16:52,333 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 67 [2021-05-06 08:16:52,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:52,334 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2021-05-06 08:16:52,334 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), 5 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 08:16:52,334 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2021-05-06 08:16:52,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-05-06 08:16:52,336 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:52,336 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 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, 1, 1, 1, 1, 1] [2021-05-06 08:16:52,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:52,550 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:52,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:52,550 INFO L82 PathProgramCache]: Analyzing trace with hash 2004479621, now seen corresponding path program 1 times [2021-05-06 08:16:52,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:52,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727523402] [2021-05-06 08:16:52,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:52,558 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:52,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680401676] [2021-05-06 08:16:52,558 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 [2021-05-06 08:16:52,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:52,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:16:52,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:52,642 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,685 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,686 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,705 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,714 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,735 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,736 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,743 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 08:16:52,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:52,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727523402] [2021-05-06 08:16:52,750 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:52,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680401676] [2021-05-06 08:16:52,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680401676] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:52,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:52,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 08:16:52,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735773320] [2021-05-06 08:16:52,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 08:16:52,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:52,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 08:16:52,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-06 08:16:52,751 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 08:16:52,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:52,837 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2021-05-06 08:16:52,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:16:52,838 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) Word has length 69 [2021-05-06 08:16:52,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:52,839 INFO L225 Difference]: With dead ends: 72 [2021-05-06 08:16:52,839 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 08:16:52,839 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 45.4ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-05-06 08:16:52,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 08:16:52,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-06 08:16:52,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 41 states have internal predecessors, (43), 23 states have call successors, (23), 9 states have call predecessors, (23), 8 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:16:52,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2021-05-06 08:16:52,842 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 69 [2021-05-06 08:16:52,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:52,843 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2021-05-06 08:16:52,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 6 states have call successors, (13), 2 states have call predecessors, (13), 2 states have return successors, (11), 5 states have call predecessors, (11), 5 states have call successors, (11) [2021-05-06 08:16:52,843 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2021-05-06 08:16:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-06 08:16:52,844 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:52,844 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2021-05-06 08:16:53,057 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:53,057 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:53,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:53,057 INFO L82 PathProgramCache]: Analyzing trace with hash 583225195, now seen corresponding path program 2 times [2021-05-06 08:16:53,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:53,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941401302] [2021-05-06 08:16:53,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:53,064 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:53,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281293377] [2021-05-06 08:16:53,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:53,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 08:16:53,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 08:16:53,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-06 08:16:53,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:53,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,169 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,195 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,203 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,204 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,210 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,229 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,230 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,231 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,238 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,239 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,240 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,246 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,247 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,248 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,254 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,255 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,256 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,284 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,292 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,298 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,300 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,322 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-05-06 08:16:53,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:53,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941401302] [2021-05-06 08:16:53,323 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:53,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281293377] [2021-05-06 08:16:53,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281293377] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:53,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:53,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 08:16:53,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180659452] [2021-05-06 08:16:53,323 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 08:16:53,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:53,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 08:16:53,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 08:16:53,324 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:16:53,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:53,423 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2021-05-06 08:16:53,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 08:16:53,424 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) Word has length 89 [2021-05-06 08:16:53,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:53,425 INFO L225 Difference]: With dead ends: 70 [2021-05-06 08:16:53,425 INFO L226 Difference]: Without dead ends: 70 [2021-05-06 08:16:53,425 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:16:53,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-06 08:16:53,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-06 08:16:53,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 08:16:53,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 83 transitions. [2021-05-06 08:16:53,428 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 83 transitions. Word has length 89 [2021-05-06 08:16:53,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:53,428 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 83 transitions. [2021-05-06 08:16:53,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 6 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:16:53,429 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 83 transitions. [2021-05-06 08:16:53,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-05-06 08:16:53,429 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:53,429 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 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, 1, 1, 1, 1, 1] [2021-05-06 08:16:53,644 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-06 08:16:53,645 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:53,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:53,645 INFO L82 PathProgramCache]: Analyzing trace with hash -757951041, now seen corresponding path program 1 times [2021-05-06 08:16:53,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:53,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833701469] [2021-05-06 08:16:53,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:53,663 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:53,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1460821684] [2021-05-06 08:16:53,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:53,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:53,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 35 conjunts are in the unsatisfiable core [2021-05-06 08:16:53,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:53,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,828 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,851 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,882 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,891 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,900 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,908 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:53,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,003 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,029 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,040 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,054 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 16 proven. 23 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 08:16:54,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:54,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833701469] [2021-05-06 08:16:54,054 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:54,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460821684] [2021-05-06 08:16:54,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460821684] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:54,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:54,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-06 08:16:54,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989744403] [2021-05-06 08:16:54,055 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-06 08:16:54,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:54,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-06 08:16:54,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-06 08:16:54,056 INFO L87 Difference]: Start difference. First operand 69 states and 83 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:16:54,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:54,362 INFO L93 Difference]: Finished difference Result 85 states and 105 transitions. [2021-05-06 08:16:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-06 08:16:54,363 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 91 [2021-05-06 08:16:54,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:54,363 INFO L225 Difference]: With dead ends: 85 [2021-05-06 08:16:54,364 INFO L226 Difference]: Without dead ends: 85 [2021-05-06 08:16:54,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 193.5ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-05-06 08:16:54,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-05-06 08:16:54,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 77. [2021-05-06 08:16:54,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 46 states have internal predecessors, (48), 23 states have call successors, (23), 10 states have call predecessors, (23), 9 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 08:16:54,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2021-05-06 08:16:54,368 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 91 [2021-05-06 08:16:54,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:54,368 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2021-05-06 08:16:54,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:16:54,368 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2021-05-06 08:16:54,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-06 08:16:54,369 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:54,369 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 6, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:54,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:54,586 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:54,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1986318484, now seen corresponding path program 1 times [2021-05-06 08:16:54,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:54,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104554333] [2021-05-06 08:16:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:54,594 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:54,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [813186616] [2021-05-06 08:16:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:16:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:54,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-06 08:16:54,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:54,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,702 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,710 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,717 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,722 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,723 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,737 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,744 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,745 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,763 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,764 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,797 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,805 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:54,841 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 23 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-05-06 08:16:54,841 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:54,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104554333] [2021-05-06 08:16:54,841 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:54,841 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813186616] [2021-05-06 08:16:54,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813186616] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:54,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:54,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 08:16:54,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510977663] [2021-05-06 08:16:54,842 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 08:16:54,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:54,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 08:16:54,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 08:16:54,843 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:16:54,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:54,983 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2021-05-06 08:16:54,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 08:16:54,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 92 [2021-05-06 08:16:54,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:54,984 INFO L225 Difference]: With dead ends: 67 [2021-05-06 08:16:54,984 INFO L226 Difference]: Without dead ends: 65 [2021-05-06 08:16:54,984 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:16:54,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-06 08:16:54,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-06 08:16:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 38 states have (on average 1.0) internal successors, (38), 38 states have internal predecessors, (38), 18 states have call successors, (18), 10 states have call predecessors, (18), 8 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 08:16:54,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 72 transitions. [2021-05-06 08:16:54,987 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 72 transitions. Word has length 92 [2021-05-06 08:16:54,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:54,987 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 72 transitions. [2021-05-06 08:16:54,987 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 10 states have internal predecessors, (27), 6 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-06 08:16:54,987 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 72 transitions. [2021-05-06 08:16:54,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-06 08:16:54,988 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 08:16:54,988 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 6, 6, 6, 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, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 08:16:55,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 08:16:55,197 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 08:16:55,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 08:16:55,198 INFO L82 PathProgramCache]: Analyzing trace with hash -371592377, now seen corresponding path program 1 times [2021-05-06 08:16:55,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 08:16:55,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515444962] [2021-05-06 08:16:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 08:16:55,205 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 08:16:55,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101588655] [2021-05-06 08:16:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-05-06 08:16:55,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 08:16:55,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 32 conjunts are in the unsatisfiable core [2021-05-06 08:16:55,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 08:16:55,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,323 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,344 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,352 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,354 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,363 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,379 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,391 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,402 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,412 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,419 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,454 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,456 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,463 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,464 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,465 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,466 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,514 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,519 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,529 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,611 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,613 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 08:16:55,637 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 41 proven. 33 refuted. 0 times theorem prover too weak. 156 trivial. 0 not checked. [2021-05-06 08:16:55,637 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 08:16:55,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515444962] [2021-05-06 08:16:55,637 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 08:16:55,637 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101588655] [2021-05-06 08:16:55,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101588655] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 08:16:55,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 08:16:55,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-05-06 08:16:55,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929377575] [2021-05-06 08:16:55,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-06 08:16:55,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 08:16:55,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-06 08:16:55,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-06 08:16:55,639 INFO L87 Difference]: Start difference. First operand 65 states and 72 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 08:16:55,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 08:16:55,929 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2021-05-06 08:16:55,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-06 08:16:55,929 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) Word has length 96 [2021-05-06 08:16:55,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 08:16:55,929 INFO L225 Difference]: With dead ends: 63 [2021-05-06 08:16:55,929 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 08:16:55,929 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-05-06 08:16:55,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 08:16:55,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 08:16:55,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 08:16:55,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 08:16:55,930 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 96 [2021-05-06 08:16:55,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 08:16:55,930 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 08:16:55,930 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 12 states have internal predecessors, (29), 8 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2021-05-06 08:16:55,930 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 08:16:55,930 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 08:16:56,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-06 08:16:56,134 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 08:16:56 BasicIcfg [2021-05-06 08:16:56,134 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 08:16:56,134 INFO L168 Benchmark]: Toolchain (without parser) took 8532.46 ms. Allocated memory was 223.3 MB in the beginning and 352.3 MB in the end (delta: 129.0 MB). Free memory was 189.3 MB in the beginning and 158.1 MB in the end (delta: 31.2 MB). Peak memory consumption was 160.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:16:56,134 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 223.3 MB. Free memory is still 205.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 08:16:56,134 INFO L168 Benchmark]: CACSL2BoogieTranslator took 136.19 ms. Allocated memory is still 223.3 MB. Free memory was 189.1 MB in the beginning and 178.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:16:56,134 INFO L168 Benchmark]: Boogie Preprocessor took 52.88 ms. Allocated memory is still 223.3 MB. Free memory was 178.8 MB in the beginning and 207.2 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:16:56,134 INFO L168 Benchmark]: RCFGBuilder took 274.98 ms. Allocated memory is still 223.3 MB. Free memory was 207.2 MB in the beginning and 190.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-06 08:16:56,134 INFO L168 Benchmark]: IcfgTransformer took 25.99 ms. Allocated memory is still 223.3 MB. Free memory was 190.4 MB in the beginning and 188.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 08:16:56,135 INFO L168 Benchmark]: TraceAbstraction took 8035.48 ms. Allocated memory was 223.3 MB in the beginning and 352.3 MB in the end (delta: 129.0 MB). Free memory was 188.3 MB in the beginning and 158.1 MB in the end (delta: 30.2 MB). Peak memory consumption was 160.5 MB. Max. memory is 8.0 GB. [2021-05-06 08:16:56,135 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.09 ms. Allocated memory is still 223.3 MB. Free memory is still 205.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 136.19 ms. Allocated memory is still 223.3 MB. Free memory was 189.1 MB in the beginning and 178.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 52.88 ms. Allocated memory is still 223.3 MB. Free memory was 178.8 MB in the beginning and 207.2 MB in the end (delta: -28.4 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 274.98 ms. Allocated memory is still 223.3 MB. Free memory was 207.2 MB in the beginning and 190.4 MB in the end (delta: 16.8 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 25.99 ms. Allocated memory is still 223.3 MB. Free memory was 190.4 MB in the beginning and 188.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8035.48 ms. Allocated memory was 223.3 MB in the beginning and 352.3 MB in the end (delta: 129.0 MB). Free memory was 188.3 MB in the beginning and 158.1 MB in the end (delta: 30.2 MB). Peak memory consumption was 160.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 13]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 40 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7989.2ms, OverallIterations: 12, TraceHistogramMax: 10, EmptinessCheckTime: 18.7ms, AutomataDifference: 1928.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 485 SDtfs, 327 SDslu, 2251 SDs, 0 SdLazy, 1656 SolverSat, 325 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1050.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 812 GetRequests, 678 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 1078.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=77occurred in iteration=10, InterpolantAutomatonStates: 114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 78.2ms AutomataMinimizationTime, 12 MinimizatonAttempts, 41 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 104.2ms SsaConstructionTime, 339.8ms SatisfiabilityAnalysisTime, 2580.5ms InterpolantComputationTime, 801 NumberOfCodeBlocks, 801 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 789 ConstructedInterpolants, 0 QuantifiedInterpolants, 3178 SizeOfPredicates, 51 NumberOfNonLiveVariables, 2412 ConjunctsInSsa, 221 ConjunctsInUnsatCore, 12 InterpolantComputations, 1 PerfectInterpolantSequences, 1207/1400 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...