/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/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 15:17:02,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 15:17:02,163 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 15:17:02,191 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 15:17:02,191 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 15:17:02,192 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 15:17:02,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 15:17:02,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 15:17:02,195 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 15:17:02,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 15:17:02,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 15:17:02,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 15:17:02,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 15:17:02,198 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 15:17:02,199 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 15:17:02,200 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 15:17:02,200 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 15:17:02,201 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 15:17:02,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 15:17:02,203 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 15:17:02,204 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 15:17:02,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 15:17:02,206 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 15:17:02,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 15:17:02,208 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 15:17:02,209 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 15:17:02,209 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 15:17:02,209 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 15:17:02,210 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 15:17:02,210 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 15:17:02,211 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 15:17:02,219 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 15:17:02,220 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 15:17:02,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 15:17:02,224 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 15:17:02,224 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 15:17:02,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 15:17:02,224 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 15:17:02,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 15:17:02,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 15:17:02,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 15:17:02,230 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 15:17:02,254 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 15:17:02,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 15:17:02,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 15:17:02,257 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 15:17:02,257 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 15:17:02,257 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 15:17:02,257 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 15:17:02,258 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 15:17:02,258 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 15:17:02,258 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 15:17:02,258 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 15:17:02,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 15:17:02,259 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 15:17:02,259 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 15:17:02,259 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 15:17:02,259 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 15:17:02,259 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 15:17:02,259 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 15:17:02,259 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 15:17:02,259 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 15:17:02,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 15:17:02,260 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 15:17:02,260 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 15:17:02,260 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 15:17:02,260 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 15:17:02,260 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 15:17:02,260 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 15:17:02,260 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 15:17:02,261 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 15:17:02,496 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 15:17:02,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 15:17:02,521 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 15:17:02,522 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 15:17:02,522 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 15:17:02,523 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound20.c [2021-05-02 15:17:02,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bc572a1e/b8b1fd5ccc364585998c70b1acce6e42/FLAGee9504126 [2021-05-02 15:17:02,898 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 15:17:02,898 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/fermat2-ll_valuebound20.c [2021-05-02 15:17:02,902 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bc572a1e/b8b1fd5ccc364585998c70b1acce6e42/FLAGee9504126 [2021-05-02 15:17:03,325 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bc572a1e/b8b1fd5ccc364585998c70b1acce6e42 [2021-05-02 15:17:03,327 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 15:17:03,328 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 15:17:03,329 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 15:17:03,329 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 15:17:03,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 15:17:03,347 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:17:03" (1/1) ... [2021-05-02 15:17:03,348 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3061c2c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:17:03, skipping insertion in model container [2021-05-02 15:17:03,348 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 03:17:03" (1/1) ... [2021-05-02 15:17:03,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 15:17:03,363 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 15:17:03,467 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_valuebound20.c[524,537] [2021-05-02 15:17:03,486 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:17:03,491 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 15:17:03,499 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_valuebound20.c[524,537] [2021-05-02 15:17:03,514 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 15:17:03,523 INFO L208 MainTranslator]: Completed translation [2021-05-02 15:17:03,524 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:17:03 WrapperNode [2021-05-02 15:17:03,524 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 15:17:03,525 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 15:17:03,525 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 15:17:03,526 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 15:17:03,538 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:17:03" (1/1) ... [2021-05-02 15:17:03,539 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:17:03" (1/1) ... [2021-05-02 15:17:03,544 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:17:03" (1/1) ... [2021-05-02 15:17:03,545 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:17:03" (1/1) ... [2021-05-02 15:17:03,559 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:17:03" (1/1) ... [2021-05-02 15:17:03,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:17:03" (1/1) ... [2021-05-02 15:17:03,565 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:17:03" (1/1) ... [2021-05-02 15:17:03,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 15:17:03,568 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 15:17:03,568 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 15:17:03,569 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 15:17:03,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:17:03" (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 15:17:03,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 15:17:03,637 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 15:17:03,637 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 15:17:03,637 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 15:17:03,637 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 15:17:03,637 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 15:17:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 15:17:03,637 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 15:17:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 15:17:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 15:17:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 15:17:03,638 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 15:17:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 15:17:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 15:17:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 15:17:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 15:17:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 15:17:03,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 15:17:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 15:17:03,640 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 15:17:03,897 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 15:17:03,897 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 15:17:03,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:17:03 BoogieIcfgContainer [2021-05-02 15:17:03,898 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 15:17:03,899 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 15:17:03,899 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 15:17:03,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 15:17:03,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 03:17:03" (1/3) ... [2021-05-02 15:17:03,901 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6798fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:17:03, skipping insertion in model container [2021-05-02 15:17:03,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 03:17:03" (2/3) ... [2021-05-02 15:17:03,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b6798fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 03:17:03, skipping insertion in model container [2021-05-02 15:17:03,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 03:17:03" (3/3) ... [2021-05-02 15:17:03,903 INFO L111 eAbstractionObserver]: Analyzing ICFG fermat2-ll_valuebound20.c [2021-05-02 15:17:03,908 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 15:17:03,910 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 15:17:03,921 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 15:17:03,945 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 15:17:03,946 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 15:17:03,946 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 15:17:03,946 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 15:17:03,946 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 15:17:03,946 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 15:17:03,946 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 15:17:03,946 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 15:17:03,958 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:17:03,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:17:03,962 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:17:03,963 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:17:03,963 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:17:03,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:17:03,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1790211013, now seen corresponding path program 1 times [2021-05-02 15:17:03,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:17:03,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416546124] [2021-05-02 15:17:03,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:17:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:17:04,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 15:17:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:17:04,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 15:17:04,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:17:04,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 15:17:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:17:04,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 15:17:04,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:17:04,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-05-02 15:17:04,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:17:04,167 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-02 15:17:04,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:17:04,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416546124] [2021-05-02 15:17:04,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416546124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 15:17:04,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 15:17:04,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 15:17:04,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211532936] [2021-05-02 15:17:04,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 15:17:04,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:17:04,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 15:17:04,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:17:04,180 INFO L87 Difference]: Start difference. First operand has 32 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 8 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:17:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:17:04,296 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2021-05-02 15:17:04,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 15:17:04,297 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:17:04,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:17:04,302 INFO L225 Difference]: With dead ends: 57 [2021-05-02 15:17:04,302 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 15:17:04,304 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 15:17:04,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 15:17:04,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 15:17:04,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 15 states have (on average 1.2) internal successors, (18), 16 states have internal predecessors, (18), 8 states have call successors, (8), 4 states have call predecessors, (8), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 15:17:04,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2021-05-02 15:17:04,353 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 33 [2021-05-02 15:17:04,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:17:04,353 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2021-05-02 15:17:04,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:17:04,354 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2021-05-02 15:17:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-05-02 15:17:04,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:17:04,355 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:17:04,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 15:17:04,355 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:17:04,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:17:04,356 INFO L82 PathProgramCache]: Analyzing trace with hash -102231875, now seen corresponding path program 1 times [2021-05-02 15:17:04,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:17:04,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101206813] [2021-05-02 15:17:04,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:17:04,386 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:17:04,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1228661564] [2021-05-02 15:17:04,387 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 15:17:04,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:17:04,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 15:17:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:17:04,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:04,570 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:04,596 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:04,598 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:04,620 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:04,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:04,708 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:04,718 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:04,744 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:17:04,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:17:04,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101206813] [2021-05-02 15:17:04,745 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:17:04,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228661564] [2021-05-02 15:17:04,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228661564] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:17:04,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:17:04,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 15:17:04,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834342681] [2021-05-02 15:17:04,746 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 15:17:04,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:17:04,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 15:17:04,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 15:17:04,747 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:17:04,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:17:04,889 INFO L93 Difference]: Finished difference Result 38 states and 45 transitions. [2021-05-02 15:17:04,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 15:17:04,892 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 33 [2021-05-02 15:17:04,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:17:04,893 INFO L225 Difference]: With dead ends: 38 [2021-05-02 15:17:04,893 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 15:17:04,894 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:17:04,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 15:17:04,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 15:17:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 22 states have internal predecessors, (26), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:17:04,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-05-02 15:17:04,900 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 33 [2021-05-02 15:17:04,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:17:04,901 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-05-02 15:17:04,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 7 states have internal predecessors, (15), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-02 15:17:04,902 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-05-02 15:17:04,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-02 15:17:04,902 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:17:04,902 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:17:05,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 15:17:05,103 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:17:05,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:17:05,104 INFO L82 PathProgramCache]: Analyzing trace with hash -453872510, now seen corresponding path program 1 times [2021-05-02 15:17:05,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:17:05,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100470621] [2021-05-02 15:17:05,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:17:05,114 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:17:05,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1019115977] [2021-05-02 15:17:05,115 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 15:17:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:17:05,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 15:17:05,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:17:05,249 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:05,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:05,262 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:05,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:05,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:05,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:05,315 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:05,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:06,267 WARN L205 SmtUtils]: Spent 903.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2021-05-02 15:17:06,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:06,279 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:06,303 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:17:06,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:17:06,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100470621] [2021-05-02 15:17:06,303 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:17:06,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019115977] [2021-05-02 15:17:06,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019115977] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:17:06,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:17:06,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 15:17:06,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974800401] [2021-05-02 15:17:06,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 15:17:06,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:17:06,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 15:17:06,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 15:17:06,305 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:17:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:17:22,758 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2021-05-02 15:17:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 15:17:22,761 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 39 [2021-05-02 15:17:22,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:17:22,761 INFO L225 Difference]: With dead ends: 41 [2021-05-02 15:17:22,761 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 15:17:22,762 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 1011.5ms TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:17:22,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 15:17:22,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-05-02 15:17:22,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 15:17:22,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2021-05-02 15:17:22,768 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 39 [2021-05-02 15:17:22,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:17:22,768 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2021-05-02 15:17:22,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-05-02 15:17:22,768 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2021-05-02 15:17:22,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 15:17:22,769 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:17:22,769 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:17:22,969 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:17:22,970 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:17:22,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:17:22,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1657118275, now seen corresponding path program 1 times [2021-05-02 15:17:22,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:17:22,971 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607850523] [2021-05-02 15:17:22,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:17:22,979 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:17:22,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [879457123] [2021-05-02 15:17:22,979 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 15:17:23,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:17:23,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:17:23,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:17:23,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:23,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:23,096 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:23,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:23,110 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:23,111 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:23,137 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:23,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:23,219 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:23,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-05-02 15:17:23,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:17:23,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607850523] [2021-05-02 15:17:23,247 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:17:23,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879457123] [2021-05-02 15:17:23,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879457123] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:17:23,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:17:23,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 15:17:23,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839336352] [2021-05-02 15:17:23,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 15:17:23,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:17:23,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 15:17:23,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 15:17:23,249 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:17:26,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:17:26,361 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-05-02 15:17:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 15:17:26,361 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-05-02 15:17:26,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:17:26,363 INFO L225 Difference]: With dead ends: 50 [2021-05-02 15:17:26,363 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 15:17:26,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-05-02 15:17:26,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 15:17:26,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2021-05-02 15:17:26,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 15:17:26,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2021-05-02 15:17:26,372 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 41 [2021-05-02 15:17:26,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:17:26,374 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2021-05-02 15:17:26,374 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 4 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-02 15:17:26,374 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2021-05-02 15:17:26,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 15:17:26,376 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:17:26,377 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:17:26,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:17:26,595 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:17:26,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:17:26,598 INFO L82 PathProgramCache]: Analyzing trace with hash 1974186685, now seen corresponding path program 2 times [2021-05-02 15:17:26,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:17:26,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126085354] [2021-05-02 15:17:26,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:17:26,606 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:17:26,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1799735589] [2021-05-02 15:17:26,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:17:26,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:17:26,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:17:26,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 15:17:26,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:17:26,731 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:26,732 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:26,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:26,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:26,750 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:26,751 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:26,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:26,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:26,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:26,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:26,880 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:26,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:26,905 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 15:17:26,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:17:26,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126085354] [2021-05-02 15:17:26,906 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:17:26,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799735589] [2021-05-02 15:17:26,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799735589] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:17:26,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:17:26,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 15:17:26,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889123671] [2021-05-02 15:17:26,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 15:17:26,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:17:26,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 15:17:26,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:17:26,907 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:17:29,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:17:29,292 INFO L93 Difference]: Finished difference Result 58 states and 65 transitions. [2021-05-02 15:17:29,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 15:17:29,292 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 49 [2021-05-02 15:17:29,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:17:29,293 INFO L225 Difference]: With dead ends: 58 [2021-05-02 15:17:29,293 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 15:17:29,293 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:17:29,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 15:17:29,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2021-05-02 15:17:29,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 15:17:29,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2021-05-02 15:17:29,309 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 49 [2021-05-02 15:17:29,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:17:29,309 INFO L480 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2021-05-02 15:17:29,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 5 states have call successors, (9), 2 states have call predecessors, (9), 3 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 15:17:29,310 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2021-05-02 15:17:29,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-05-02 15:17:29,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:17:29,315 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:17:29,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:17:29,529 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:17:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:17:29,529 INFO L82 PathProgramCache]: Analyzing trace with hash -197393475, now seen corresponding path program 3 times [2021-05-02 15:17:29,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:17:29,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716572102] [2021-05-02 15:17:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:17:29,536 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:17:29,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968618541] [2021-05-02 15:17:29,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:17:29,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:17:29,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:17:29,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 15:17:29,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:17:29,661 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:29,663 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 21 proven. 1 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-05-02 15:17:29,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:17:29,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716572102] [2021-05-02 15:17:29,690 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:17:29,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968618541] [2021-05-02 15:17:29,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968618541] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:17:29,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:17:29,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 15:17:29,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436569109] [2021-05-02 15:17:29,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 15:17:29,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:17:29,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 15:17:29,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 15:17:29,692 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 15:17:33,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:17:33,766 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2021-05-02 15:17:33,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 15:17:33,767 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 57 [2021-05-02 15:17:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:17:33,768 INFO L225 Difference]: With dead ends: 70 [2021-05-02 15:17:33,768 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 15:17:33,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 15:17:33,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 15:17:33,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 56. [2021-05-02 15:17:33,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 11 states have call successors, (11), 8 states have call predecessors, (11), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 15:17:33,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 63 transitions. [2021-05-02 15:17:33,774 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 63 transitions. Word has length 57 [2021-05-02 15:17:33,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:17:33,775 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 63 transitions. [2021-05-02 15:17:33,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-05-02 15:17:33,775 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 63 transitions. [2021-05-02 15:17:33,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-05-02 15:17:33,775 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:17:33,775 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:17:34,003 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 15:17:34,003 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:17:34,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:17:34,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1923807749, now seen corresponding path program 1 times [2021-05-02 15:17:34,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:17:34,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784451667] [2021-05-02 15:17:34,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:17:34,016 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:17:34,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694393305] [2021-05-02 15:17:34,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:17:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 15:17:34,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 52 conjunts are in the unsatisfiable core [2021-05-02 15:17:34,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:17:34,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,197 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,198 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,258 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,301 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,303 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,424 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,430 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,490 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,506 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,542 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,544 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:34,937 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 12 proven. 49 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-05-02 15:17:34,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:17:34,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784451667] [2021-05-02 15:17:34,937 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:17:34,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694393305] [2021-05-02 15:17:34,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694393305] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:17:34,937 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:17:34,937 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-05-02 15:17:34,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028750955] [2021-05-02 15:17:34,938 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 15:17:34,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:17:34,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 15:17:34,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-05-02 15:17:34,938 INFO L87 Difference]: Start difference. First operand 56 states and 63 transitions. Second operand has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 15:17:40,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:17:40,324 INFO L93 Difference]: Finished difference Result 108 states and 131 transitions. [2021-05-02 15:17:40,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 15:17:40,325 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 65 [2021-05-02 15:17:40,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:17:40,326 INFO L225 Difference]: With dead ends: 108 [2021-05-02 15:17:40,326 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 15:17:40,327 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 659.1ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-05-02 15:17:40,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 15:17:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 82. [2021-05-02 15:17:40,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 58 states have internal predecessors, (65), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 15:17:40,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2021-05-02 15:17:40,340 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 65 [2021-05-02 15:17:40,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:17:40,340 INFO L480 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2021-05-02 15:17:40,341 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 2.0625) internal successors, (33), 14 states have internal predecessors, (33), 9 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 15:17:40,341 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2021-05-02 15:17:40,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 15:17:40,342 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:17:40,342 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:17:40,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:17:40,545 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:17:40,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:17:40,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1860102713, now seen corresponding path program 2 times [2021-05-02 15:17:40,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:17:40,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839398707] [2021-05-02 15:17:40,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:17:40,561 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:17:40,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250615187] [2021-05-02 15:17:40,561 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:17:40,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 15:17:40,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:17:40,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 16 conjunts are in the unsatisfiable core [2021-05-02 15:17:40,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:17:40,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,698 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,706 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,726 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,727 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,740 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,742 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,755 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,756 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,757 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,758 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,770 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,772 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,788 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,789 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,790 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,791 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,802 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,821 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,824 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,835 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,837 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 26 proven. 43 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-05-02 15:17:40,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:17:40,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839398707] [2021-05-02 15:17:40,908 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:17:40,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250615187] [2021-05-02 15:17:40,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250615187] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:17:40,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:17:40,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:17:40,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526325048] [2021-05-02 15:17:40,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:17:40,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:17:40,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:17:40,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:17:40,910 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 15:17:50,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:17:50,875 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2021-05-02 15:17:50,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:17:50,876 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 73 [2021-05-02 15:17:50,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:17:50,877 INFO L225 Difference]: With dead ends: 120 [2021-05-02 15:17:50,877 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 15:17:50,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-05-02 15:17:50,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 15:17:50,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-05-02 15:17:50,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 62 states have internal predecessors, (70), 17 states have call successors, (17), 10 states have call predecessors, (17), 9 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-02 15:17:50,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 103 transitions. [2021-05-02 15:17:50,887 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 103 transitions. Word has length 73 [2021-05-02 15:17:50,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:17:50,887 INFO L480 AbstractCegarLoop]: Abstraction has 88 states and 103 transitions. [2021-05-02 15:17:50,887 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 8 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2021-05-02 15:17:50,887 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 103 transitions. [2021-05-02 15:17:50,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-02 15:17:50,888 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 15:17:50,888 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 15:17:51,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:17:51,089 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 15:17:51,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 15:17:51,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1204892615, now seen corresponding path program 3 times [2021-05-02 15:17:51,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 15:17:51,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223280661] [2021-05-02 15:17:51,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 15:17:51,099 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 15:17:51,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894706576] [2021-05-02 15:17:51,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 15:17:51,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 15:17:51,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 15:17:51,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 15:17:51,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 15:17:51,235 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:51,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:51,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:51,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:51,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:51,266 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:51,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:51,281 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:51,294 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:51,295 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:51,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:51,343 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 15:17:51,363 INFO L134 CoverageAnalysis]: Checked inductivity of 124 backedges. 48 proven. 1 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-05-02 15:17:51,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 15:17:51,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223280661] [2021-05-02 15:17:51,364 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 15:17:51,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894706576] [2021-05-02 15:17:51,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894706576] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 15:17:51,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 15:17:51,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 15:17:51,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980172716] [2021-05-02 15:17:51,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 15:17:51,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 15:17:51,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 15:17:51,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 15:17:51,366 INFO L87 Difference]: Start difference. First operand 88 states and 103 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:18:01,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 15:18:01,541 INFO L93 Difference]: Finished difference Result 100 states and 115 transitions. [2021-05-02 15:18:01,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 15:18:01,542 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 73 [2021-05-02 15:18:01,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 15:18:01,542 INFO L225 Difference]: With dead ends: 100 [2021-05-02 15:18:01,542 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 15:18:01,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 77.1ms TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-05-02 15:18:01,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 15:18:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 15:18:01,543 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) [2021-05-02 15:18:01,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 15:18:01,543 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 73 [2021-05-02 15:18:01,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 15:18:01,543 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 15:18:01,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 3 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2021-05-02 15:18:01,543 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 15:18:01,543 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 15:18:01,744 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 15:18:01,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 15:18:15,692 WARN L205 SmtUtils]: Spent 13.72 s on a formula simplification. DAG size of input: 83 DAG size of output: 29 [2021-05-02 15:18:31,468 WARN L205 SmtUtils]: Spent 15.78 s on a formula simplification. DAG size of input: 83 DAG size of output: 29 [2021-05-02 15:18:31,499 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-02 15:18:31,500 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-02 15:18:31,500 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-02 15:18:31,500 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:18:31,500 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 15:18:31,500 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:18:31,500 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 15:18:31,500 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 15:18:31,500 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 15:18:31,500 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 15:18:31,500 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2021-05-02 15:18:31,500 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-02 15:18:31,500 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-02 15:18:31,500 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-02 15:18:31,500 INFO L194 CegarLoopUtils]: At program point L35-2(lines 35 46) the Hoare annotation is: (let ((.cse1 (* main_~v~0 main_~v~0)) (.cse2 (* main_~A~0 4)) (.cse3 (* main_~u~0 2)) (.cse0 (+ (* main_~u~0 main_~u~0) (* main_~v~0 2)))) (and (= .cse0 (+ .cse1 .cse2 (* main_~r~0 4) .cse3)) (= (+ .cse1 .cse2 .cse3) .cse0) (<= 0 main_~A~0) (<= main_~A~0 20))) [2021-05-02 15:18:31,500 INFO L198 CegarLoopUtils]: For program point L29(line 29) no Hoare annotation was computed. [2021-05-02 15:18:31,501 INFO L194 CegarLoopUtils]: At program point L27(line 27) the Hoare annotation is: (and (< (+ (* main_~R~0 main_~R~0) 1) (+ main_~A~0 (* 2 main_~R~0))) (<= main_~A~0 20) (<= 0 main_~R~0)) [2021-05-02 15:18:31,501 INFO L194 CegarLoopUtils]: At program point L25(line 25) the Hoare annotation is: (and (<= 0 main_~A~0) (<= main_~A~0 20)) [2021-05-02 15:18:31,501 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 19 51) no Hoare annotation was computed. [2021-05-02 15:18:31,501 INFO L194 CegarLoopUtils]: At program point L25-1(line 25) the Hoare annotation is: (and (<= main_~R~0 20) (<= 0 main_~A~0) (<= main_~A~0 20) (<= 0 main_~R~0)) [2021-05-02 15:18:31,501 INFO L201 CegarLoopUtils]: At program point L23(line 23) the Hoare annotation is: true [2021-05-02 15:18:31,501 INFO L198 CegarLoopUtils]: For program point L23-1(line 23) no Hoare annotation was computed. [2021-05-02 15:18:31,501 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 19 51) no Hoare annotation was computed. [2021-05-02 15:18:31,501 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (and (< (+ (* main_~R~0 main_~R~0) 1) (+ main_~A~0 (* 2 main_~R~0))) (= (+ (* main_~u~0 main_~u~0) (* main_~v~0 2)) (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2))) (<= 0 main_~A~0) (<= main_~A~0 20) (= (mod main_~A~0 2) 1)) [2021-05-02 15:18:31,501 INFO L198 CegarLoopUtils]: For program point L36-1(lines 35 46) no Hoare annotation was computed. [2021-05-02 15:18:31,501 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 19 51) the Hoare annotation is: true [2021-05-02 15:18:31,501 INFO L198 CegarLoopUtils]: For program point L49(line 49) no Hoare annotation was computed. [2021-05-02 15:18:31,501 INFO L198 CegarLoopUtils]: For program point L39(lines 39 45) no Hoare annotation was computed. [2021-05-02 15:18:31,501 INFO L194 CegarLoopUtils]: At program point L39-2(lines 35 46) the Hoare annotation is: (and (< (+ (* main_~R~0 main_~R~0) 1) (+ main_~A~0 (* 2 main_~R~0))) (= (+ (* main_~u~0 main_~u~0) (* main_~v~0 2)) (+ (* main_~v~0 main_~v~0) (* main_~A~0 4) (* main_~r~0 4) (* main_~u~0 2))) (<= 0 main_~A~0) (<= main_~A~0 20) (= (mod main_~A~0 2) 1)) [2021-05-02 15:18:31,501 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-02 15:18:31,501 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-02 15:18:31,501 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-02 15:18:31,502 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-02 15:18:31,502 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-02 15:18:31,502 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-02 15:18:31,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 03:18:31 BoogieIcfgContainer [2021-05-02 15:18:31,512 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 15:18:31,512 INFO L168 Benchmark]: Toolchain (without parser) took 88184.81 ms. Allocated memory was 217.1 MB in the beginning and 261.1 MB in the end (delta: 44.0 MB). Free memory was 181.1 MB in the beginning and 165.5 MB in the end (delta: 15.6 MB). Peak memory consumption was 132.9 MB. Max. memory is 8.0 GB. [2021-05-02 15:18:31,512 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 217.1 MB. Free memory is still 197.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 15:18:31,512 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.31 ms. Allocated memory is still 217.1 MB. Free memory was 181.0 MB in the beginning and 171.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:18:31,512 INFO L168 Benchmark]: Boogie Preprocessor took 42.54 ms. Allocated memory is still 217.1 MB. Free memory was 171.1 MB in the beginning and 200.2 MB in the end (delta: -29.1 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-02 15:18:31,513 INFO L168 Benchmark]: RCFGBuilder took 329.60 ms. Allocated memory is still 217.1 MB. Free memory was 200.2 MB in the beginning and 184.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-02 15:18:31,513 INFO L168 Benchmark]: TraceAbstraction took 87613.02 ms. Allocated memory was 217.1 MB in the beginning and 261.1 MB in the end (delta: 44.0 MB). Free memory was 183.9 MB in the beginning and 165.5 MB in the end (delta: 18.4 MB). Peak memory consumption was 135.8 MB. Max. memory is 8.0 GB. [2021-05-02 15:18:31,513 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 217.1 MB. Free memory is still 197.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 195.31 ms. Allocated memory is still 217.1 MB. Free memory was 181.0 MB in the beginning and 171.1 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 42.54 ms. Allocated memory is still 217.1 MB. Free memory was 171.1 MB in the beginning and 200.2 MB in the end (delta: -29.1 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 329.60 ms. Allocated memory is still 217.1 MB. Free memory was 200.2 MB in the beginning and 184.4 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 87613.02 ms. Allocated memory was 217.1 MB in the beginning and 261.1 MB in the end (delta: 44.0 MB). Free memory was 183.9 MB in the beginning and 165.5 MB in the end (delta: 18.4 MB). Peak memory consumption was 135.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: 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 6 procedures, 35 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 57800.6ms, OverallIterations: 9, TraceHistogramMax: 6, EmptinessCheckTime: 18.0ms, AutomataDifference: 51851.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 29754.6ms, InitialAbstractionConstructionTime: 9.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 226 SDtfs, 167 SDslu, 1207 SDs, 0 SdLazy, 1367 SolverSat, 83 SolverUnsat, 20 SolverUnknown, 0 SolverNotchecked, 50962.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 466 GetRequests, 363 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2267.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=8, InterpolantAutomatonStates: 92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 105.5ms AutomataMinimizationTime, 9 MinimizatonAttempts, 49 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 13 LocationsWithAnnotation, 38 PreInvPairs, 68 NumberOfFragments, 209 HoareAnnotationTreeSize, 38 FomulaSimplifications, 7596 FormulaSimplificationTreeSizeReduction, 137.9ms HoareSimplificationTime, 13 FomulaSimplificationsInter, 875 FormulaSimplificationTreeSizeReductionInter, 29608.2ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 70.1ms SsaConstructionTime, 325.0ms SatisfiabilityAnalysisTime, 3280.9ms InterpolantComputationTime, 463 NumberOfCodeBlocks, 393 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 454 ConstructedInterpolants, 0 QuantifiedInterpolants, 3051 SizeOfPredicates, 28 NumberOfNonLiveVariables, 1255 ConjunctsInSsa, 192 ConjunctsInUnsatCore, 9 InterpolantComputations, 1 PerfectInterpolantSequences, 392/538 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 - InvariantResult [Line: 35]: Loop Invariant Derived loop invariant: (((R * R + 1 < A + 2 * R && u * u + v * 2 == v * v + A * 4 + r * 4 + u * 2) && 0 <= A) && A <= 20) && A % 2 == 1 RESULT: Ultimate proved your program to be correct! Received shutdown request...