/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/fermat2-ll_unwindbound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 20:37:07,503 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 20:37:07,505 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 20:37:07,535 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 20:37:07,536 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 20:37:07,538 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 20:37:07,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 20:37:07,544 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 20:37:07,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 20:37:07,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 20:37:07,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 20:37:07,554 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 20:37:07,555 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 20:37:07,555 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 20:37:07,556 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 20:37:07,556 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 20:37:07,557 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 20:37:07,557 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 20:37:07,558 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 20:37:07,575 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 20:37:07,576 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 20:37:07,579 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 20:37:07,579 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 20:37:07,580 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 20:37:07,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 20:37:07,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 20:37:07,581 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 20:37:07,582 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 20:37:07,582 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 20:37:07,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 20:37:07,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 20:37:07,583 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 20:37:07,584 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 20:37:07,584 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 20:37:07,585 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 20:37:07,585 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 20:37:07,586 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 20:37:07,586 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 20:37:07,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 20:37:07,587 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 20:37:07,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 20:37:07,593 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/LoopAccelerationJordanC.epf [2021-05-02 20:37:07,605 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 20:37:07,605 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 20:37:07,607 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 20:37:07,607 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 20:37:07,607 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 20:37:07,608 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 20:37:07,608 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 20:37:07,608 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 20:37:07,608 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 20:37:07,608 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 20:37:07,609 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 20:37:07,609 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 20:37:07,609 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 20:37:07,609 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 20:37:07,609 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 20:37:07,609 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 20:37:07,609 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 20:37:07,610 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 20:37:07,610 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:37:07,610 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 20:37:07,610 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 20:37:07,611 INFO L136 SettingsManager]: Preferences of IcfgTransformer differ from their defaults: [2021-05-02 20:37:07,611 INFO L138 SettingsManager]: * TransformationType=LOOP_ACCELERATION_JORDAN WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 20:37:07,874 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 20:37:07,894 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 20:37:07,896 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 20:37:07,897 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 20:37:07,897 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 20:37:07,898 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c [2021-05-02 20:37:07,939 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c7aec685/4fae5318724f4adbb81a73df5a0ad997/FLAG616df00af [2021-05-02 20:37:08,259 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 20:37:08,259 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_unwindbound1.c [2021-05-02 20:37:08,263 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c7aec685/4fae5318724f4adbb81a73df5a0ad997/FLAG616df00af [2021-05-02 20:37:08,687 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c7aec685/4fae5318724f4adbb81a73df5a0ad997 [2021-05-02 20:37:08,689 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 20:37:08,690 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-05-02 20:37:08,691 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 20:37:08,691 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 20:37:08,701 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 20:37:08,701 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:37:08" (1/1) ... [2021-05-02 20:37:08,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d14367 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:08, skipping insertion in model container [2021-05-02 20:37:08,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 08:37:08" (1/1) ... [2021-05-02 20:37:08,709 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 20:37:08,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 20:37:08,793 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/fermat2-ll_unwindbound1.c[524,537] [2021-05-02 20:37:08,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:37:08,811 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 20:37:08,849 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/fermat2-ll_unwindbound1.c[524,537] [2021-05-02 20:37:08,853 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 20:37:08,862 INFO L208 MainTranslator]: Completed translation [2021-05-02 20:37:08,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:08 WrapperNode [2021-05-02 20:37:08,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 20:37:08,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 20:37:08,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 20:37:08,865 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 20:37:08,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:08" (1/1) ... [2021-05-02 20:37:08,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:08" (1/1) ... [2021-05-02 20:37:08,877 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:08" (1/1) ... [2021-05-02 20:37:08,877 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:08" (1/1) ... [2021-05-02 20:37:08,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:08" (1/1) ... [2021-05-02 20:37:08,891 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:08" (1/1) ... [2021-05-02 20:37:08,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:08" (1/1) ... [2021-05-02 20:37:08,897 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 20:37:08,898 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 20:37:08,898 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 20:37:08,898 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 20:37:08,899 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:08" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 20:37:08,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 20:37:08,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 20:37:08,959 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 20:37:08,959 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 20:37:08,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 20:37:08,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 20:37:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 20:37:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 20:37:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 20:37:08,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 20:37:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 20:37:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 20:37:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 20:37:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 20:37:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 20:37:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 20:37:08,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 20:37:08,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 20:37:08,961 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 20:37:08,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 20:37:09,189 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 20:37:09,189 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 20:37:09,190 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:37:09 BoogieIcfgContainer [2021-05-02 20:37:09,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 20:37:09,190 INFO L113 PluginConnector]: ------------------------IcfgTransformer---------------------------- [2021-05-02 20:37:09,191 INFO L271 PluginConnector]: Initializing IcfgTransformer... [2021-05-02 20:37:09,191 INFO L275 PluginConnector]: IcfgTransformer initialized [2021-05-02 20:37:09,198 INFO L185 PluginConnector]: Executing the observer IcfgTransformationObserver from plugin IcfgTransformer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:37:09" (1/1) ... [2021-05-02 20:37:09,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:37:09 BasicIcfg [2021-05-02 20:37:09,213 INFO L132 PluginConnector]: ------------------------ END IcfgTransformer---------------------------- [2021-05-02 20:37:09,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 20:37:09,215 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 20:37:09,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 20:37:09,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 08:37:08" (1/4) ... [2021-05-02 20:37:09,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4f4c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:37:09, skipping insertion in model container [2021-05-02 20:37:09,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 08:37:08" (2/4) ... [2021-05-02 20:37:09,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4f4c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 08:37:09, skipping insertion in model container [2021-05-02 20:37:09,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 08:37:09" (3/4) ... [2021-05-02 20:37:09,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e4f4c1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:37:09, skipping insertion in model container [2021-05-02 20:37:09,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.icfgtransformation CFG 02.05 08:37:09" (4/4) ... [2021-05-02 20:37:09,221 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_unwindbound1.cJordan [2021-05-02 20:37:09,225 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:ForwardPredicates Determinization: PREDICATE_ABSTRACTION [2021-05-02 20:37:09,228 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 20:37:09,240 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 20:37:09,259 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 20:37:09,259 INFO L377 AbstractCegarLoop]: Hoare is false [2021-05-02 20:37:09,259 INFO L378 AbstractCegarLoop]: Compute interpolants for ForwardPredicates [2021-05-02 20:37:09,259 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 20:37:09,259 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 20:37:09,260 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 20:37:09,260 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 20:37:09,260 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 20:37:09,269 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:37:09,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 20:37:09,278 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:09,279 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:09,279 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:09,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:09,286 INFO L82 PathProgramCache]: Analyzing trace with hash 734203501, now seen corresponding path program 1 times [2021-05-02 20:37:09,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:09,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175374181] [2021-05-02 20:37:09,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:09,377 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:09,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1606751848] [2021-05-02 20:37:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:37:09,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 1 conjunts are in the unsatisfiable core [2021-05-02 20:37:09,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:09,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 20:37:09,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:09,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175374181] [2021-05-02 20:37:09,539 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:09,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606751848] [2021-05-02 20:37:09,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606751848] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:37:09,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:37:09,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-02 20:37:09,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565321293] [2021-05-02 20:37:09,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 2 states [2021-05-02 20:37:09,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:09,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-05-02 20:37:09,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:37:09,552 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:37:09,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:09,561 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-05-02 20:37:09,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-05-02 20:37:09,562 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 20:37:09,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:09,566 INFO L225 Difference]: With dead ends: 30 [2021-05-02 20:37:09,566 INFO L226 Difference]: Without dead ends: 25 [2021-05-02 20:37:09,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-05-02 20:37:09,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-05-02 20:37:09,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-05-02 20:37:09,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:37:09,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 20:37:09,588 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 20:37:09,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:09,588 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 20:37:09,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:37:09,588 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 20:37:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:37:09,589 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:09,589 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:09,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-05-02 20:37:09,806 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:09,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:09,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1669026344, now seen corresponding path program 1 times [2021-05-02 20:37:09,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:09,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259247898] [2021-05-02 20:37:09,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:09,816 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:09,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [934423076] [2021-05-02 20:37:09,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:09,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:37:09,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 20:37:09,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:09,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:09,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:09,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:09,931 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:09,933 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:09,945 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 20:37:09,945 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:09,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259247898] [2021-05-02 20:37:09,945 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:09,945 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934423076] [2021-05-02 20:37:09,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934423076] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 20:37:09,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 20:37:09,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 20:37:09,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716639043] [2021-05-02 20:37:09,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 20:37:09,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:09,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 20:37:09,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:37:09,947 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:37:09,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:09,955 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2021-05-02 20:37:09,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 20:37:09,956 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:37:09,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:09,956 INFO L225 Difference]: With dead ends: 27 [2021-05-02 20:37:09,956 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 20:37:09,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 20:37:09,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 20:37:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 20:37:09,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 20:37:09,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 20:37:09,960 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 20:37:09,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:09,961 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 20:37:09,961 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:37:09,961 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 20:37:09,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 20:37:09,961 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:09,962 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:10,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:10,177 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:10,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:10,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1667953868, now seen corresponding path program 1 times [2021-05-02 20:37:10,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:10,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693916693] [2021-05-02 20:37:10,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:10,186 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:10,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [871695689] [2021-05-02 20:37:10,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:37:10,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 20:37:10,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:10,291 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:10,297 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:10,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:10,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:37:10,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:10,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693916693] [2021-05-02 20:37:10,393 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:10,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871695689] [2021-05-02 20:37:10,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871695689] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:37:10,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:37:10,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 20:37:10,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768823301] [2021-05-02 20:37:10,394 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 20:37:10,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:10,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 20:37:10,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 20:37:10,394 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:37:14,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:14,535 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2021-05-02 20:37:14,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 20:37:14,535 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 20:37:14,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:14,536 INFO L225 Difference]: With dead ends: 35 [2021-05-02 20:37:14,537 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 20:37:14,537 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 67.2ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:37:14,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 20:37:14,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 20:37:14,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 20:37:14,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 20:37:14,541 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 20:37:14,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:14,541 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 20:37:14,541 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 20:37:14,541 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 20:37:14,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 20:37:14,542 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:14,542 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:14,746 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:14,746 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:14,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:14,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1179905874, now seen corresponding path program 1 times [2021-05-02 20:37:14,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:14,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005136288] [2021-05-02 20:37:14,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:14,756 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:14,757 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200355652] [2021-05-02 20:37:14,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:14,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 20:37:14,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 20:37:14,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 20:37:14,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,893 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,897 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,901 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,907 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,909 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,919 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,920 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,923 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,926 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,934 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,981 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,987 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,989 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,992 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:14,997 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,019 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,022 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,032 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,034 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,075 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,079 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,085 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,088 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 20:37:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 20:37:15,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 20:37:15,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005136288] [2021-05-02 20:37:15,126 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 20:37:15,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200355652] [2021-05-02 20:37:15,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200355652] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 20:37:15,127 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 20:37:15,127 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 20:37:15,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340776330] [2021-05-02 20:37:15,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 20:37:15,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 20:37:15,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 20:37:15,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 20:37:15,130 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:37:19,765 WARN L205 SmtUtils]: Spent 2.53 s on a formula simplification that was a NOOP. DAG size: 26 [2021-05-02 20:37:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 20:37:35,401 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2021-05-02 20:37:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 20:37:35,402 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 20:37:35,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 20:37:35,404 INFO L225 Difference]: With dead ends: 43 [2021-05-02 20:37:35,404 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 20:37:35,405 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 2677.4ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 20:37:35,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 20:37:35,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 20:37:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.25) internal successors, (30), 26 states have internal predecessors, (30), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 20:37:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-05-02 20:37:35,414 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 29 [2021-05-02 20:37:35,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 20:37:35,414 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-05-02 20:37:35,414 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 20:37:35,414 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-05-02 20:37:35,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 20:37:35,415 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 20:37:35,415 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 20:37:35,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:35,616 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 20:37:35,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 20:37:35,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1668946595, now seen corresponding path program 1 times [2021-05-02 20:37:35,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 20:37:35,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999304679] [2021-05-02 20:37:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 20:37:35,624 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 20:37:35,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981803799] [2021-05-02 20:37:35,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:35,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:37:35,723 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:37:35,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 20:37:35,737 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 20:37:35,765 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 20:37:35,765 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 20:37:35,965 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 20:37:35,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 08:37:35 BasicIcfg [2021-05-02 20:37:35,989 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 20:37:35,990 INFO L168 Benchmark]: Toolchain (without parser) took 27299.75 ms. Allocated memory was 219.2 MB in the beginning and 280.0 MB in the end (delta: 60.8 MB). Free memory was 183.5 MB in the beginning and 177.8 MB in the end (delta: 5.7 MB). Peak memory consumption was 65.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:37:35,990 INFO L168 Benchmark]: CDTParser took 0.09 ms. Allocated memory is still 219.2 MB. Free memory is still 200.2 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 20:37:35,990 INFO L168 Benchmark]: CACSL2BoogieTranslator took 171.91 ms. Allocated memory is still 219.2 MB. Free memory was 183.3 MB in the beginning and 201.7 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. [2021-05-02 20:37:35,990 INFO L168 Benchmark]: Boogie Preprocessor took 32.19 ms. Allocated memory is still 219.2 MB. Free memory was 201.7 MB in the beginning and 200.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:37:35,990 INFO L168 Benchmark]: RCFGBuilder took 292.29 ms. Allocated memory is still 219.2 MB. Free memory was 200.0 MB in the beginning and 185.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 20:37:35,990 INFO L168 Benchmark]: IcfgTransformer took 23.03 ms. Allocated memory is still 219.2 MB. Free memory was 185.3 MB in the beginning and 183.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 20:37:35,990 INFO L168 Benchmark]: TraceAbstraction took 26774.27 ms. Allocated memory was 219.2 MB in the beginning and 280.0 MB in the end (delta: 60.8 MB). Free memory was 183.6 MB in the beginning and 177.8 MB in the end (delta: 5.8 MB). Peak memory consumption was 66.6 MB. Max. memory is 8.0 GB. [2021-05-02 20:37:35,991 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 219.2 MB. Free memory is still 200.2 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 171.91 ms. Allocated memory is still 219.2 MB. Free memory was 183.3 MB in the beginning and 201.7 MB in the end (delta: -18.4 MB). Peak memory consumption was 11.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.19 ms. Allocated memory is still 219.2 MB. Free memory was 201.7 MB in the beginning and 200.4 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 292.29 ms. Allocated memory is still 219.2 MB. Free memory was 200.0 MB in the beginning and 185.3 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * IcfgTransformer took 23.03 ms. Allocated memory is still 219.2 MB. Free memory was 185.3 MB in the beginning and 183.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 26774.27 ms. Allocated memory was 219.2 MB in the beginning and 280.0 MB in the end (delta: 60.8 MB). Free memory was 183.6 MB in the beginning and 177.8 MB in the end (delta: 5.8 MB). Peak memory consumption was 66.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 14]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int counter = 0; VAL [\old(counter)=19, counter=0] [L21] int A, R; [L22] long long u, v, r; [L23] A = __VERIFIER_nondet_int() [L24] R = __VERIFIER_nondet_int() [L26] CALL assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L26] RET assume_abort_if_not(((long long) R - 1) * ((long long) R - 1) < A) VAL [\old(counter)=0, A=7, counter=0, R=3] [L28] CALL assume_abort_if_not(A % 2 == 1) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L9] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L28] RET assume_abort_if_not(A % 2 == 1) VAL [\old(counter)=0, A=7, counter=0, R=3] [L30] u = ((long long) 2 * R) + 1 [L31] v = 1 [L32] r = ((long long) R * R) - A VAL [\old(counter)=0, A=7, counter=0, R=3, r=2, u=7, v=1] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=1, counter++=0, r=2, R=3, u=7, v=1] [L34] COND TRUE counter++<1 [L35] CALL __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L12] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L35] RET __VERIFIER_assert(4*(A+r) == u*u - v*v - 2*u + 2*v) VAL [\old(counter)=0, A=7, counter=1, R=3, r=2, u=7, v=1] [L36] COND FALSE !(!(r != 0)) VAL [\old(counter)=0, A=7, counter=1, r=2, R=3, u=7, v=1] [L38] COND TRUE r > 0 [L39] r = r - v [L40] v = v + 2 VAL [\old(counter)=0, A=7, counter=1, R=3, r=1, u=7, v=3] [L34] EXPR counter++ VAL [\old(counter)=0, A=7, counter=2, counter++=1, R=3, r=1, u=7, v=3] [L34] COND FALSE !(counter++<1) [L48] CALL __VERIFIER_assert(((long long) 4*A) == u*u - v*v - 2*u + 2*v) VAL [\old(cond)=0, \old(counter)=0, counter=2] [L12] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] [L14] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=2] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 26708.3ms, OverallIterations: 5, TraceHistogramMax: 2, EmptinessCheckTime: 13.5ms, AutomataDifference: 24453.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 7.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 99 SDtfs, 35 SDslu, 286 SDs, 0 SdLazy, 214 SolverSat, 6 SolverUnsat, 7 SolverUnknown, 0 SolverNotchecked, 21709.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 100 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 2752.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=37occurred in iteration=4, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 28.1ms AutomataMinimizationTime, 4 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 44.3ms SsaConstructionTime, 184.3ms SatisfiabilityAnalysisTime, 582.1ms InterpolantComputationTime, 129 NumberOfCodeBlocks, 129 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 93 ConstructedInterpolants, 7 QuantifiedInterpolants, 441 SizeOfPredicates, 9 NumberOfNonLiveVariables, 515 ConjunctsInSsa, 43 ConjunctsInUnsatCore, 4 InterpolantComputations, 2 PerfectInterpolantSequences, 11/18 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 RESULT: Ultimate proved your program to be incorrect! Received shutdown request...