/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/ps6-ll_valuebound5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 17:19:25,902 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 17:19:25,904 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 17:19:25,948 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 17:19:25,966 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 17:19:25,967 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 17:19:25,968 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 17:19:25,969 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 17:19:25,971 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 17:19:25,972 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 17:19:25,982 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 17:19:25,986 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 17:19:25,987 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 17:19:25,987 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 17:19:25,988 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 17:19:25,990 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 17:19:25,994 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 17:19:26,016 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 17:19:26,017 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 17:19:26,018 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 17:19:26,021 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 17:19:26,078 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 17:19:26,078 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 17:19:26,080 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 17:19:26,080 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 17:19:26,081 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 17:19:26,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 17:19:26,081 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 17:19:26,081 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 17:19:26,081 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 17:19:26,081 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 17:19:26,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 17:19:26,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 17:19:26,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 17:19:26,082 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 17:19:26,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 17:19:26,083 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 17:19:26,083 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 17:19:26,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 17:19:26,083 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 17:19:26,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 17:19:26,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 17:19:26,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 17:19:26,084 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 17:19:26,084 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 17:19:26,084 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 17:19:26,084 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 17:19:26,084 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 17:19:26,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 17:19:26,084 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 17:19:26,500 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 17:19:26,530 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 17:19:26,532 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 17:19:26,532 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 17:19:26,538 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 17:19:26,538 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-05-02 17:19:26,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/405dff3dc/e2fa838c561e41b3ac6a5a95924f0939/FLAGb72ae6833 [2021-05-02 17:19:27,151 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 17:19:27,151 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-05-02 17:19:27,156 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/405dff3dc/e2fa838c561e41b3ac6a5a95924f0939/FLAGb72ae6833 [2021-05-02 17:19:27,569 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/405dff3dc/e2fa838c561e41b3ac6a5a95924f0939 [2021-05-02 17:19:27,571 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 17:19:27,572 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 17:19:27,575 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 17:19:27,575 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 17:19:27,577 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 17:19:27,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:19:27" (1/1) ... [2021-05-02 17:19:27,578 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e812dfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:27, skipping insertion in model container [2021-05-02 17:19:27,579 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 05:19:27" (1/1) ... [2021-05-02 17:19:27,588 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 17:19:27,612 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 17:19:27,778 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/ps6-ll_valuebound5.c[458,471] [2021-05-02 17:19:27,817 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:19:27,822 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 17:19:27,881 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/ps6-ll_valuebound5.c[458,471] [2021-05-02 17:19:27,898 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 17:19:27,923 INFO L208 MainTranslator]: Completed translation [2021-05-02 17:19:27,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:27 WrapperNode [2021-05-02 17:19:27,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 17:19:27,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 17:19:27,925 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 17:19:27,926 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 17:19:27,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:27" (1/1) ... [2021-05-02 17:19:27,933 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:27" (1/1) ... [2021-05-02 17:19:27,943 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:27" (1/1) ... [2021-05-02 17:19:27,943 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:27" (1/1) ... [2021-05-02 17:19:27,965 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:27" (1/1) ... [2021-05-02 17:19:27,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:27" (1/1) ... [2021-05-02 17:19:27,972 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:27" (1/1) ... [2021-05-02 17:19:27,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 17:19:27,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 17:19:27,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 17:19:27,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 17:19:27,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:27" (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 17:19:28,034 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 17:19:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 17:19:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 17:19:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 17:19:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 17:19:28,035 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 17:19:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 17:19:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 17:19:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 17:19:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 17:19:28,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_short [2021-05-02 17:19:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 17:19:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 17:19:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 17:19:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 17:19:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 17:19:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 17:19:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 17:19:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 17:19:28,036 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 17:19:28,177 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 17:19:28,177 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 17:19:28,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:19:28 BoogieIcfgContainer [2021-05-02 17:19:28,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 17:19:28,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 17:19:28,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 17:19:28,180 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 17:19:28,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 05:19:27" (1/3) ... [2021-05-02 17:19:28,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb6096d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:19:28, skipping insertion in model container [2021-05-02 17:19:28,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 05:19:27" (2/3) ... [2021-05-02 17:19:28,181 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7cb6096d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 05:19:28, skipping insertion in model container [2021-05-02 17:19:28,181 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 05:19:28" (3/3) ... [2021-05-02 17:19:28,182 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound5.c [2021-05-02 17:19:28,185 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 17:19:28,187 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 17:19:28,197 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 17:19:28,224 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 17:19:28,224 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 17:19:28,224 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 17:19:28,224 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 17:19:28,224 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 17:19:28,224 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 17:19:28,225 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 17:19:28,225 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 17:19:28,243 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:19:28,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:19:28,245 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:28,246 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:28,246 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:28,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:28,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1098891495, now seen corresponding path program 1 times [2021-05-02 17:19:28,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:28,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096733145] [2021-05-02 17:19:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:28,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 17:19:28,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:28,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 17:19:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:28,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 17:19:28,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:28,387 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 17:19:28,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:28,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096733145] [2021-05-02 17:19:28,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096733145] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 17:19:28,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 17:19:28,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 17:19:28,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926735049] [2021-05-02 17:19:28,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 17:19:28,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:28,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 17:19:28,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:19:28,400 INFO L87 Difference]: Start difference. First operand has 29 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:19:30,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:30,543 INFO L93 Difference]: Finished difference Result 51 states and 69 transitions. [2021-05-02 17:19:30,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 17:19:30,545 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 17:19:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:30,550 INFO L225 Difference]: With dead ends: 51 [2021-05-02 17:19:30,550 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 17:19:30,552 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 17:19:30,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 17:19:30,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-02 17:19:30,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 7 states have call successors, (7), 4 states have call predecessors, (7), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 17:19:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-05-02 17:19:30,574 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 22 [2021-05-02 17:19:30,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:30,575 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-05-02 17:19:30,575 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 17:19:30,575 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-05-02 17:19:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 17:19:30,576 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:30,576 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:30,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 17:19:30,576 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:30,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:30,577 INFO L82 PathProgramCache]: Analyzing trace with hash 769620075, now seen corresponding path program 1 times [2021-05-02 17:19:30,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:30,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327532756] [2021-05-02 17:19:30,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:30,588 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:30,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665653476] [2021-05-02 17:19:30,588 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 17:19:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:30,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:19:30,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:30,728 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:30,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:19:30,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:30,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327532756] [2021-05-02 17:19:30,792 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:30,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665653476] [2021-05-02 17:19:30,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665653476] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:30,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:30,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:19:30,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388094836] [2021-05-02 17:19:30,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:19:30,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:30,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:19:30,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:19:30,794 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 17:19:30,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:30,876 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2021-05-02 17:19:30,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:19:30,877 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 22 [2021-05-02 17:19:30,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:30,877 INFO L225 Difference]: With dead ends: 35 [2021-05-02 17:19:30,877 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 17:19:30,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.2ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:19:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 17:19:30,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 17:19:30,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 19 states have internal predecessors, (20), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 17:19:30,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2021-05-02 17:19:30,885 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 22 [2021-05-02 17:19:30,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:30,886 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2021-05-02 17:19:30,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-05-02 17:19:30,886 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2021-05-02 17:19:30,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 17:19:30,886 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:30,887 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:31,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 17:19:31,105 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash 645812411, now seen corresponding path program 1 times [2021-05-02 17:19:31,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:31,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038980758] [2021-05-02 17:19:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:31,130 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:31,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1809102456] [2021-05-02 17:19:31,131 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 17:19:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:31,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 17:19:31,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:31,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:31,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 17:19:31,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:31,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038980758] [2021-05-02 17:19:31,347 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:31,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809102456] [2021-05-02 17:19:31,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809102456] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:31,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:31,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 17:19:31,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054965624] [2021-05-02 17:19:31,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 17:19:31,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:31,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 17:19:31,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-02 17:19:31,349 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 17:19:31,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:31,447 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2021-05-02 17:19:31,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 17:19:31,448 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2021-05-02 17:19:31,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:31,449 INFO L225 Difference]: With dead ends: 42 [2021-05-02 17:19:31,449 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 17:19:31,449 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 63.0ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:19:31,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 17:19:31,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 17:19:31,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 25 states have internal predecessors, (26), 10 states have call successors, (10), 6 states have call predecessors, (10), 5 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:19:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-05-02 17:19:31,455 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2021-05-02 17:19:31,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:31,455 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-05-02 17:19:31,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-02 17:19:31,456 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-05-02 17:19:31,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 17:19:31,456 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:31,456 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:31,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:31,671 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:31,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:31,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1415216747, now seen corresponding path program 2 times [2021-05-02 17:19:31,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:31,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260571725] [2021-05-02 17:19:31,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:31,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:31,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119586262] [2021-05-02 17:19:31,682 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 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 17:19:31,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:19:31,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:19:31,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 17:19:31,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:31,818 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:31,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:31,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:31,961 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 17:19:31,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:31,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260571725] [2021-05-02 17:19:31,962 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:31,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119586262] [2021-05-02 17:19:31,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119586262] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:31,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:31,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 17:19:31,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809955665] [2021-05-02 17:19:31,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 17:19:31,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:31,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 17:19:31,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:19:31,963 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:19:32,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:32,091 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-05-02 17:19:32,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 17:19:32,091 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 36 [2021-05-02 17:19:32,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:32,092 INFO L225 Difference]: With dead ends: 51 [2021-05-02 17:19:32,092 INFO L226 Difference]: Without dead ends: 49 [2021-05-02 17:19:32,092 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:19:32,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-05-02 17:19:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-05-02 17:19:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:19:32,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2021-05-02 17:19:32,099 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 36 [2021-05-02 17:19:32,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:32,104 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2021-05-02 17:19:32,104 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 4 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 17:19:32,104 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2021-05-02 17:19:32,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 17:19:32,105 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:32,105 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 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 17:19:32,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:32,321 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:32,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:32,322 INFO L82 PathProgramCache]: Analyzing trace with hash 463554397, now seen corresponding path program 1 times [2021-05-02 17:19:32,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:32,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938308523] [2021-05-02 17:19:32,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:32,330 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:32,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457177692] [2021-05-02 17:19:32,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:32,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 17:19:32,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-02 17:19:32,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:32,399 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,420 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,455 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,468 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,469 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,480 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,487 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-05-02 17:19:32,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:32,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938308523] [2021-05-02 17:19:32,505 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:32,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457177692] [2021-05-02 17:19:32,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457177692] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:32,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:32,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 17:19:32,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073213287] [2021-05-02 17:19:32,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 17:19:32,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:32,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 17:19:32,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 17:19:32,507 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 17:19:32,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:32,616 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2021-05-02 17:19:32,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 17:19:32,616 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 40 [2021-05-02 17:19:32,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:32,618 INFO L225 Difference]: With dead ends: 56 [2021-05-02 17:19:32,618 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:19:32,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:19:32,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:19:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 17:19:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 30 states have internal predecessors, (31), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:19:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 51 transitions. [2021-05-02 17:19:32,625 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 51 transitions. Word has length 40 [2021-05-02 17:19:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:32,625 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 51 transitions. [2021-05-02 17:19:32,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 5 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 17:19:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 51 transitions. [2021-05-02 17:19:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 17:19:32,626 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:32,626 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:32,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:32,842 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:32,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:32,842 INFO L82 PathProgramCache]: Analyzing trace with hash 380668603, now seen corresponding path program 3 times [2021-05-02 17:19:32,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:32,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323758269] [2021-05-02 17:19:32,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:32,861 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:32,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120676719] [2021-05-02 17:19:32,861 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 17:19:32,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 17:19:32,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:19:32,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 17:19:32,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:33,056 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:33,071 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:33,107 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-05-02 17:19:33,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:33,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323758269] [2021-05-02 17:19:33,107 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:33,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120676719] [2021-05-02 17:19:33,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120676719] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:33,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:33,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 17:19:33,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764856795] [2021-05-02 17:19:33,108 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 17:19:33,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:33,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 17:19:33,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-05-02 17:19:33,108 INFO L87 Difference]: Start difference. First operand 46 states and 51 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 17:19:51,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:51,563 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-02 17:19:51,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 17:19:51,564 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 43 [2021-05-02 17:19:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:51,564 INFO L225 Difference]: With dead ends: 52 [2021-05-02 17:19:51,564 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:19:51,565 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 123.8ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 17:19:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:19:51,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 40. [2021-05-02 17:19:51,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 17:19:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-05-02 17:19:51,571 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 43 [2021-05-02 17:19:51,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:51,571 INFO L480 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-05-02 17:19:51,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2021-05-02 17:19:51,571 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-05-02 17:19:51,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 17:19:51,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:51,572 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:51,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 17:19:51,788 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1886956461, now seen corresponding path program 2 times [2021-05-02 17:19:51,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:51,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503363854] [2021-05-02 17:19:51,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:51,795 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:51,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050934785] [2021-05-02 17:19:51,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:51,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 17:19:51,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:19:51,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-02 17:19:51,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:51,898 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,899 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,918 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,941 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,949 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,961 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,962 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,971 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-05-02 17:19:51,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:51,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503363854] [2021-05-02 17:19:51,990 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:51,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050934785] [2021-05-02 17:19:51,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050934785] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:51,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:51,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 17:19:51,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551782959] [2021-05-02 17:19:51,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:19:51,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:51,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:19:51,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:19:51,991 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 17:19:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:52,088 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2021-05-02 17:19:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 17:19:52,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 47 [2021-05-02 17:19:52,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:52,089 INFO L225 Difference]: With dead ends: 51 [2021-05-02 17:19:52,089 INFO L226 Difference]: Without dead ends: 45 [2021-05-02 17:19:52,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-05-02 17:19:52,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-05-02 17:19:52,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2021-05-02 17:19:52,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 10 states have call successors, (10), 7 states have call predecessors, (10), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 17:19:52,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-05-02 17:19:52,095 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 47 [2021-05-02 17:19:52,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:52,095 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-05-02 17:19:52,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 5 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-05-02 17:19:52,095 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-05-02 17:19:52,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 17:19:52,096 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:52,096 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:52,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:52,312 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:52,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:52,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1213805219, now seen corresponding path program 3 times [2021-05-02 17:19:52,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:52,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943227504] [2021-05-02 17:19:52,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:52,320 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:52,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [903892857] [2021-05-02 17:19:52,320 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 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 17:19:52,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 17:19:52,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:19:52,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 30 conjunts are in the unsatisfiable core [2021-05-02 17:19:52,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:52,512 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,513 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,548 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,585 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,610 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,618 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,630 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:52,659 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2021-05-02 17:19:52,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:52,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943227504] [2021-05-02 17:19:52,659 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:52,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903892857] [2021-05-02 17:19:52,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903892857] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:52,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:52,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 17:19:52,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472556171] [2021-05-02 17:19:52,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 17:19:52,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:52,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 17:19:52,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:19:52,661 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 17:19:54,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:54,848 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2021-05-02 17:19:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 17:19:54,848 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) Word has length 54 [2021-05-02 17:19:54,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:54,849 INFO L225 Difference]: With dead ends: 54 [2021-05-02 17:19:54,849 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 17:19:54,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:19:54,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 17:19:54,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 46. [2021-05-02 17:19:54,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 11 states have call successors, (11), 7 states have call predecessors, (11), 5 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 17:19:54,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-05-02 17:19:54,855 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 54 [2021-05-02 17:19:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:54,856 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-05-02 17:19:54,856 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 10 states have internal predecessors, (24), 6 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-05-02 17:19:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-05-02 17:19:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-02 17:19:54,856 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:54,856 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:55,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 17:19:55,060 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:55,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:55,061 INFO L82 PathProgramCache]: Analyzing trace with hash 307258797, now seen corresponding path program 4 times [2021-05-02 17:19:55,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:55,061 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410247880] [2021-05-02 17:19:55,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:55,067 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:55,067 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [445453015] [2021-05-02 17:19:55,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:19:55,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 17:19:55,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:19:55,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 17:19:55,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:55,182 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,183 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,217 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,264 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,265 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,286 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,310 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,338 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 12 proven. 33 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-05-02 17:19:55,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:55,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410247880] [2021-05-02 17:19:55,358 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:55,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445453015] [2021-05-02 17:19:55,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445453015] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:55,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:55,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 17:19:55,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476423511] [2021-05-02 17:19:55,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 17:19:55,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:55,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 17:19:55,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-05-02 17:19:55,360 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 8 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 17:19:55,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:55,477 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-05-02 17:19:55,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 17:19:55,478 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 8 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 61 [2021-05-02 17:19:55,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:55,478 INFO L225 Difference]: With dead ends: 57 [2021-05-02 17:19:55,478 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 17:19:55,479 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 121.3ms TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-05-02 17:19:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 17:19:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2021-05-02 17:19:55,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 12 states have call successors, (12), 7 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 17:19:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2021-05-02 17:19:55,485 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 61 [2021-05-02 17:19:55,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:55,485 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2021-05-02 17:19:55,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 8 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 17:19:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2021-05-02 17:19:55,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 17:19:55,486 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:55,486 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:55,701 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 17:19:55,701 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:55,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:55,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1082774365, now seen corresponding path program 5 times [2021-05-02 17:19:55,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:55,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817962050] [2021-05-02 17:19:55,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:55,707 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:55,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1539398961] [2021-05-02 17:19:55,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:56,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 17:19:56,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:19:56,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 34 conjunts are in the unsatisfiable core [2021-05-02 17:19:56,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:56,368 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,397 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,409 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,410 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,411 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,436 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,474 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,475 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,500 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,509 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,524 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,525 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,533 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,558 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,566 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,567 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,569 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-05-02 17:19:56,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:56,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817962050] [2021-05-02 17:19:56,588 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:56,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539398961] [2021-05-02 17:19:56,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539398961] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:56,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:56,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-05-02 17:19:56,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254813416] [2021-05-02 17:19:56,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 17:19:56,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:56,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 17:19:56,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-05-02 17:19:56,590 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-02 17:19:56,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:56,739 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2021-05-02 17:19:56,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 17:19:56,739 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 68 [2021-05-02 17:19:56,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:56,740 INFO L225 Difference]: With dead ends: 60 [2021-05-02 17:19:56,740 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 17:19:56,740 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-05-02 17:19:56,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 17:19:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2021-05-02 17:19:56,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 13 states have call successors, (13), 7 states have call predecessors, (13), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 17:19:56,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2021-05-02 17:19:56,746 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 68 [2021-05-02 17:19:56,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:56,747 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2021-05-02 17:19:56,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 13 states have internal predecessors, (31), 8 states have call successors, (12), 2 states have call predecessors, (12), 3 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2021-05-02 17:19:56,747 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2021-05-02 17:19:56,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 17:19:56,747 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 17:19:56,748 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 17:19:56,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:56,954 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 17:19:56,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 17:19:56,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1692754003, now seen corresponding path program 6 times [2021-05-02 17:19:56,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 17:19:56,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141548184] [2021-05-02 17:19:56,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 17:19:56,960 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 17:19:56,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [394846102] [2021-05-02 17:19:56,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 17:19:57,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 17:19:57,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 17:19:57,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjunts are in the unsatisfiable core [2021-05-02 17:19:57,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 17:19:57,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,290 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,307 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,309 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,317 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,327 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,328 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,336 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,348 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,392 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,393 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,394 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,400 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,401 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,414 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,415 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,422 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,437 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,445 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,446 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,447 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 17:19:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 123 proven. 3 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-05-02 17:19:57,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 17:19:57,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141548184] [2021-05-02 17:19:57,461 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 17:19:57,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394846102] [2021-05-02 17:19:57,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394846102] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 17:19:57,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 17:19:57,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 17:19:57,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397047736] [2021-05-02 17:19:57,462 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 17:19:57,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 17:19:57,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 17:19:57,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-02 17:19:57,463 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 9 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-02 17:19:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 17:19:57,515 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2021-05-02 17:19:57,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 17:19:57,515 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 9 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 75 [2021-05-02 17:19:57,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 17:19:57,516 INFO L225 Difference]: With dead ends: 58 [2021-05-02 17:19:57,516 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 17:19:57,516 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 62.7ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-05-02 17:19:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 17:19:57,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 17:19:57,516 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 17:19:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 17:19:57,517 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 75 [2021-05-02 17:19:57,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 17:19:57,517 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 17:19:57,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 9 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2021-05-02 17:19:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 17:19:57,517 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 17:19:57,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-05-02 17:19:57,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 17:21:56,231 WARN L205 SmtUtils]: Spent 1.97 m on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2021-05-02 17:21:56,494 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2021-05-02 17:22:00,692 WARN L205 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2021-05-02 17:22:07,118 WARN L205 SmtUtils]: Spent 6.41 s on a formula simplification. DAG size of input: 85 DAG size of output: 53 [2021-05-02 17:22:07,123 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 17:22:07,123 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 17:22:07,123 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 17:22:07,123 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:22:07,123 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 17:22:07,123 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:22:07,123 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 17:22:07,123 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 17:22:07,124 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 17:22:07,124 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 17:22:07,124 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 6 8) the Hoare annotation is: true [2021-05-02 17:22:07,124 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-02 17:22:07,124 INFO L198 CegarLoopUtils]: For program point L7-2(lines 6 8) no Hoare annotation was computed. [2021-05-02 17:22:07,124 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 6 8) no Hoare annotation was computed. [2021-05-02 17:22:07,124 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 17 42) the Hoare annotation is: true [2021-05-02 17:22:07,124 INFO L194 CegarLoopUtils]: At program point L29(line 29) the Hoare annotation is: (let ((.cse2 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse2 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2)))) (.cse1 (<= main_~k~0 5))) (or (and (= 5 main_~y~0) .cse0 (<= 5 main_~c~0) (< 4 main_~k~0) .cse1) (and .cse0 (= main_~y~0 2) (< 1 main_~k~0) .cse1 (= main_~c~0 2)) (and (= main_~c~0 0) (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0) .cse1) (and (= main_~c~0 1) (= main_~y~0 1) (= main_~x~0 .cse2) .cse1 (< main_~c~0 (+ main_~k~0 1))) (and (<= main_~c~0 4) .cse0 (< 3 main_~k~0) (= main_~y~0 4) .cse1 (<= 4 main_~c~0)) (and .cse0 (< 2 main_~k~0) .cse1 (= main_~c~0 3) (= main_~y~0 3))))) [2021-05-02 17:22:07,124 INFO L198 CegarLoopUtils]: For program point L29-1(lines 28 37) no Hoare annotation was computed. [2021-05-02 17:22:07,124 INFO L194 CegarLoopUtils]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse2 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (let ((.cse0 (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse2 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2)))) (.cse1 (<= main_~k~0 5))) (or (and (= 5 main_~y~0) .cse0 (<= 5 main_~c~0) (< 4 main_~k~0) .cse1) (and .cse0 (= main_~y~0 2) (< 1 main_~k~0) .cse1 (= main_~c~0 2)) (and (= main_~c~0 0) (<= 0 main_~k~0) (= main_~y~0 0) (= main_~x~0 0) .cse1) (and (= main_~c~0 1) (= main_~y~0 1) (= main_~x~0 .cse2) .cse1 (< main_~c~0 (+ main_~k~0 1))) (and (<= main_~c~0 4) .cse0 (< 3 main_~k~0) (= main_~y~0 4) .cse1 (<= 4 main_~c~0)) (and .cse0 (< 2 main_~k~0) .cse1 (= main_~c~0 3) (= main_~y~0 3))))) [2021-05-02 17:22:07,124 INFO L194 CegarLoopUtils]: At program point L28-3(lines 28 37) the Hoare annotation is: (let ((.cse0 (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0))) (let ((.cse1 (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* .cse0 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2))))) (or (and (<= main_~k~0 1) (= main_~y~0 1) (= main_~x~0 .cse0) (<= main_~c~0 1) (< 0 main_~k~0)) (and (<= main_~c~0 4) .cse1 (<= main_~k~0 4) (< 3 main_~k~0) (= main_~y~0 4)) (and (= 5 main_~y~0) .cse1 (< 4 main_~k~0) (<= main_~k~0 5)) (and .cse1 (<= main_~c~0 3) (< 2 main_~k~0) (<= main_~k~0 3) (= main_~y~0 3)) (and (= main_~y~0 0) (= main_~x~0 0)) (and .cse1 (<= main_~c~0 2) (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2))))) [2021-05-02 17:22:07,125 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 17 42) no Hoare annotation was computed. [2021-05-02 17:22:07,125 INFO L198 CegarLoopUtils]: For program point L22(line 22) no Hoare annotation was computed. [2021-05-02 17:22:07,125 INFO L201 CegarLoopUtils]: At program point L21(line 21) the Hoare annotation is: true [2021-05-02 17:22:07,125 INFO L194 CegarLoopUtils]: At program point L21-1(line 21) the Hoare annotation is: (and (<= 0 main_~k~0) (<= main_~k~0 5)) [2021-05-02 17:22:07,125 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 17 42) no Hoare annotation was computed. [2021-05-02 17:22:07,125 INFO L198 CegarLoopUtils]: For program point L40(line 40) no Hoare annotation was computed. [2021-05-02 17:22:07,125 INFO L194 CegarLoopUtils]: At program point L39(line 39) the Hoare annotation is: (let ((.cse0 (= (+ (* main_~x~0 12) (* main_~y~0 main_~y~0)) (+ (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0) 5) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 6) (* (* main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0 main_~y~0) 2))))) (or (and (<= main_~c~0 4) .cse0 (<= main_~k~0 4) (< 3 main_~k~0) (= main_~y~0 4)) (and (<= main_~k~0 1) (= main_~y~0 1) (< 0 main_~k~0) (<= main_~c~0 1)) (and .cse0 (<= main_~c~0 3) (< 2 main_~k~0) (<= main_~k~0 3) (= main_~y~0 3)) (and (= 5 main_~y~0) .cse0 (< 4 main_~k~0) (<= main_~k~0 5)) (and (= main_~y~0 0) (= main_~x~0 0)) (and .cse0 (<= main_~c~0 2) (= main_~y~0 2) (< 1 main_~k~0) (<= main_~k~0 2)))) [2021-05-02 17:22:07,125 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 9 15) the Hoare annotation is: true [2021-05-02 17:22:07,125 INFO L198 CegarLoopUtils]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-05-02 17:22:07,125 INFO L198 CegarLoopUtils]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-05-02 17:22:07,125 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 9 15) no Hoare annotation was computed. [2021-05-02 17:22:07,125 INFO L198 CegarLoopUtils]: For program point L10-2(lines 9 15) no Hoare annotation was computed. [2021-05-02 17:22:07,125 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-05-02 17:22:07,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 05:22:07 BoogieIcfgContainer [2021-05-02 17:22:07,137 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 17:22:07,137 INFO L168 Benchmark]: Toolchain (without parser) took 159564.91 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 144.8 MB in the beginning and 188.7 MB in the end (delta: -43.9 MB). Peak memory consumption was 108.5 MB. Max. memory is 8.0 GB. [2021-05-02 17:22:07,137 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 180.4 MB. Free memory is still 161.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 17:22:07,137 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.48 ms. Allocated memory is still 180.4 MB. Free memory was 144.6 MB in the beginning and 162.9 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:22:07,137 INFO L168 Benchmark]: Boogie Preprocessor took 50.75 ms. Allocated memory is still 180.4 MB. Free memory was 162.9 MB in the beginning and 161.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 17:22:07,137 INFO L168 Benchmark]: RCFGBuilder took 201.62 ms. Allocated memory is still 180.4 MB. Free memory was 161.5 MB in the beginning and 147.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 17:22:07,137 INFO L168 Benchmark]: TraceAbstraction took 158957.85 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 146.8 MB in the beginning and 188.7 MB in the end (delta: -41.9 MB). Peak memory consumption was 110.5 MB. Max. memory is 8.0 GB. [2021-05-02 17:22:07,138 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 180.4 MB. Free memory is still 161.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 348.48 ms. Allocated memory is still 180.4 MB. Free memory was 144.6 MB in the beginning and 162.9 MB in the end (delta: -18.3 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 50.75 ms. Allocated memory is still 180.4 MB. Free memory was 162.9 MB in the beginning and 161.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 201.62 ms. Allocated memory is still 180.4 MB. Free memory was 161.5 MB in the beginning and 147.2 MB in the end (delta: 14.3 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 158957.85 ms. Allocated memory was 180.4 MB in the beginning and 217.1 MB in the end (delta: 36.7 MB). Free memory was 146.8 MB in the beginning and 188.7 MB in the end (delta: -41.9 MB). Peak memory consumption was 110.5 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 12]: 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, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 29498.9ms, OverallIterations: 11, TraceHistogramMax: 9, EmptinessCheckTime: 20.7ms, AutomataDifference: 23655.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 129401.0ms, InitialAbstractionConstructionTime: 6.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 307 SDtfs, 134 SDslu, 1426 SDs, 0 SdLazy, 1110 SolverSat, 83 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 23130.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 499 GetRequests, 390 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 907.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=10, InterpolantAutomatonStates: 112, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 70.5ms AutomataMinimizationTime, 11 MinimizatonAttempts, 21 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 37 PreInvPairs, 62 NumberOfFragments, 910 HoareAnnotationTreeSize, 37 FomulaSimplifications, 3307 FormulaSimplificationTreeSizeReduction, 68.2ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 1062 FormulaSimplificationTreeSizeReductionInter, 129324.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 84.7ms SsaConstructionTime, 1252.7ms SatisfiabilityAnalysisTime, 1745.7ms InterpolantComputationTime, 497 NumberOfCodeBlocks, 474 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 486 ConstructedInterpolants, 0 QuantifiedInterpolants, 1847 SizeOfPredicates, 31 NumberOfNonLiveVariables, 1588 ConjunctsInSsa, 227 ConjunctsInUnsatCore, 11 InterpolantComputations, 1 PerfectInterpolantSequences, 510/662 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: 28]: Loop Invariant Derived loop invariant: ((((((((5 == y && x * 12 + y * y == y * y * y * y * 5 + y * y * y * y * y * 6 + y * y * y * y * y * y * 2) && 5 <= c) && 4 < k) && k <= 5) || ((((x * 12 + y * y == y * y * y * y * 5 + y * y * y * y * y * 6 + y * y * y * y * y * y * 2 && y == 2) && 1 < k) && k <= 5) && c == 2)) || ((((c == 0 && 0 <= k) && y == 0) && x == 0) && k <= 5)) || ((((c == 1 && y == 1) && x == y * y * y * y * y) && k <= 5) && c < k + 1)) || (((((c <= 4 && x * 12 + y * y == y * y * y * y * 5 + y * y * y * y * y * 6 + y * y * y * y * y * y * 2) && 3 < k) && y == 4) && k <= 5) && 4 <= c)) || ((((x * 12 + y * y == y * y * y * y * 5 + y * y * y * y * y * 6 + y * y * y * y * y * y * 2 && 2 < k) && k <= 5) && c == 3) && y == 3) RESULT: Ultimate proved your program to be correct! Received shutdown request...