/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/sqrt1-ll_valuebound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-6253b08 [2021-05-06 05:11:30,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-06 05:11:30,418 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-06 05:11:30,436 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-06 05:11:30,442 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-06 05:11:30,443 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-06 05:11:30,444 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-06 05:11:30,444 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-06 05:11:30,445 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-06 05:11:30,445 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-06 05:11:30,446 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-06 05:11:30,447 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-06 05:11:30,469 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-06 05:11:30,470 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-06 05:11:30,471 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-06 05:11:30,471 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-06 05:11:30,473 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-06 05:11:30,477 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-06 05:11:30,478 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-06 05:11:30,478 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-06 05:11:30,479 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 [2021-05-06 05:11:30,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-06 05:11:30,494 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-06 05:11:30,495 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-06 05:11:30,495 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-06 05:11:30,495 INFO L138 SettingsManager]: * Use SBE=true [2021-05-06 05:11:30,495 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-06 05:11:30,495 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-06 05:11:30,495 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-06 05:11:30,495 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-06 05:11:30,495 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-06 05:11:30,495 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-06 05:11:30,496 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-06 05:11:30,496 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-06 05:11:30,496 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-06 05:11:30,496 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-06 05:11:30,496 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-06 05:11:30,496 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-06 05:11:30,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-06 05:11:30,496 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-06 05:11:30,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-06 05:11:30,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:11:30,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-06 05:11:30,497 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-06 05:11:30,497 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-06 05:11:30,497 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-06 05:11:30,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-06 05:11:30,497 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-06 05:11:30,497 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-06 05:11:30,497 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-06 05:11:30,714 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-06 05:11:30,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-06 05:11:30,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-06 05:11:30,729 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-06 05:11:30,730 INFO L275 PluginConnector]: CDTParser initialized [2021-05-06 05:11:30,731 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2021-05-06 05:11:30,772 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c94b6519/929a6bacb0b24b61859d606bb8a80415/FLAG4da607c92 [2021-05-06 05:11:31,332 INFO L306 CDTParser]: Found 1 translation units. [2021-05-06 05:11:31,332 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/sqrt1-ll_valuebound10.c [2021-05-06 05:11:31,338 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c94b6519/929a6bacb0b24b61859d606bb8a80415/FLAG4da607c92 [2021-05-06 05:11:31,799 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5c94b6519/929a6bacb0b24b61859d606bb8a80415 [2021-05-06 05:11:31,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-06 05:11:31,803 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-06 05:11:31,804 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-06 05:11:31,804 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-06 05:11:31,807 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-06 05:11:31,807 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:11:31" (1/1) ... [2021-05-06 05:11:31,808 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d75c61f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:31, skipping insertion in model container [2021-05-06 05:11:31,808 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.05 05:11:31" (1/1) ... [2021-05-06 05:11:31,815 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-06 05:11:31,826 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-06 05:11:31,904 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/sqrt1-ll_valuebound10.c[520,533] [2021-05-06 05:11:31,913 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:11:31,921 INFO L203 MainTranslator]: Completed pre-run [2021-05-06 05:11:31,949 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/sqrt1-ll_valuebound10.c[520,533] [2021-05-06 05:11:31,953 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-06 05:11:31,964 INFO L208 MainTranslator]: Completed translation [2021-05-06 05:11:31,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:31 WrapperNode [2021-05-06 05:11:31,964 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-06 05:11:31,965 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-06 05:11:31,965 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-06 05:11:31,965 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-06 05:11:31,971 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:31" (1/1) ... [2021-05-06 05:11:31,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:31" (1/1) ... [2021-05-06 05:11:31,975 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:31" (1/1) ... [2021-05-06 05:11:31,975 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:31" (1/1) ... [2021-05-06 05:11:31,978 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:31" (1/1) ... [2021-05-06 05:11:31,980 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:31" (1/1) ... [2021-05-06 05:11:31,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:31" (1/1) ... [2021-05-06 05:11:31,982 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-06 05:11:31,982 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-06 05:11:31,983 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-06 05:11:31,983 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-06 05:11:31,983 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-06 05:11:32,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-06 05:11:32,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-06 05:11:32,038 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-06 05:11:32,038 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-06 05:11:32,038 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-06 05:11:32,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-06 05:11:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-06 05:11:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-06 05:11:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-06 05:11:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-06 05:11:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-06 05:11:32,039 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-06 05:11:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-06 05:11:32,040 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-06 05:11:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-06 05:11:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-06 05:11:32,041 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-06 05:11:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-06 05:11:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-06 05:11:32,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-06 05:11:32,178 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-06 05:11:32,179 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-06 05:11:32,180 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:11:32 BoogieIcfgContainer [2021-05-06 05:11:32,180 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-06 05:11:32,181 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-06 05:11:32,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-06 05:11:32,182 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-06 05:11:32,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.05 05:11:31" (1/3) ... [2021-05-06 05:11:32,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1878b419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:11:32, skipping insertion in model container [2021-05-06 05:11:32,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.05 05:11:31" (2/3) ... [2021-05-06 05:11:32,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1878b419 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.05 05:11:32, skipping insertion in model container [2021-05-06 05:11:32,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.05 05:11:32" (3/3) ... [2021-05-06 05:11:32,184 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll_valuebound10.c [2021-05-06 05:11:32,188 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-06 05:11:32,190 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-06 05:11:32,200 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-06 05:11:32,225 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-06 05:11:32,226 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-06 05:11:32,226 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-06 05:11:32,226 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-06 05:11:32,226 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-06 05:11:32,226 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-06 05:11:32,226 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-06 05:11:32,226 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-06 05:11:32,253 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-06 05:11:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:11:32,256 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:32,257 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:32,257 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:32,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:32,260 INFO L82 PathProgramCache]: Analyzing trace with hash 326851384, now seen corresponding path program 1 times [2021-05-06 05:11:32,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:32,268 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060615361] [2021-05-06 05:11:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:32,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:32,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:11:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:32,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 05:11:32,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:32,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:11:32,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:32,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060615361] [2021-05-06 05:11:32,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060615361] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:32,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:32,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-06 05:11:32,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574806106] [2021-05-06 05:11:32,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-06 05:11:32,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:32,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-06 05:11:32,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:11:32,459 INFO L87 Difference]: Start difference. First operand has 31 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 05:11:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:32,557 INFO L93 Difference]: Finished difference Result 53 states and 76 transitions. [2021-05-06 05:11:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-06 05:11:32,559 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 05:11:32,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:32,564 INFO L225 Difference]: With dead ends: 53 [2021-05-06 05:11:32,565 INFO L226 Difference]: Without dead ends: 26 [2021-05-06 05:11:32,567 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-06 05:11:32,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-06 05:11:32,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-05-06 05:11:32,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-06 05:11:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-05-06 05:11:32,605 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 17 [2021-05-06 05:11:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:32,606 INFO L480 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-05-06 05:11:32,606 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, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 05:11:32,606 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-05-06 05:11:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-06 05:11:32,608 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:32,609 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:32,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-06 05:11:32,609 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:32,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:32,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1008578050, now seen corresponding path program 1 times [2021-05-06 05:11:32,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:32,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423170887] [2021-05-06 05:11:32,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:32,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-06 05:11:32,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:32,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-06 05:11:32,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:32,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:11:32,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:32,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423170887] [2021-05-06 05:11:32,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423170887] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:32,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:32,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-06 05:11:32,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449723640] [2021-05-06 05:11:32,751 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:32,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:32,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:32,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:32,752 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 05:11:32,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:32,997 INFO L93 Difference]: Finished difference Result 40 states and 50 transitions. [2021-05-06 05:11:32,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:11:32,997 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 17 [2021-05-06 05:11:32,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:32,999 INFO L225 Difference]: With dead ends: 40 [2021-05-06 05:11:33,000 INFO L226 Difference]: Without dead ends: 38 [2021-05-06 05:11:33,000 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:11:33,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-06 05:11:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2021-05-06 05:11:33,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 20 states have internal predecessors, (21), 13 states have call successors, (13), 5 states have call predecessors, (13), 4 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-06 05:11:33,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2021-05-06 05:11:33,018 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 17 [2021-05-06 05:11:33,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:33,018 INFO L480 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2021-05-06 05:11:33,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-05-06 05:11:33,019 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2021-05-06 05:11:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-06 05:11:33,019 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:33,020 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:33,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-06 05:11:33,021 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:33,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:33,023 INFO L82 PathProgramCache]: Analyzing trace with hash -789682422, now seen corresponding path program 1 times [2021-05-06 05:11:33,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:33,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731610609] [2021-05-06 05:11:33,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:33,040 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:33,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1417523490] [2021-05-06 05:11:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:33,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:33,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:11:33,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:33,170 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-06 05:11:33,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:33,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731610609] [2021-05-06 05:11:33,186 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:33,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417523490] [2021-05-06 05:11:33,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417523490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:33,186 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:33,186 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:11:33,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550771357] [2021-05-06 05:11:33,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:11:33,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:33,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:11:33,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:11:33,187 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:11:33,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:33,219 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-05-06 05:11:33,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:11:33,219 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-06 05:11:33,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:33,220 INFO L225 Difference]: With dead ends: 44 [2021-05-06 05:11:33,220 INFO L226 Difference]: Without dead ends: 42 [2021-05-06 05:11:33,220 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-06 05:11:33,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-06 05:11:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 23 states have internal predecessors, (24), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-06 05:11:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 50 transitions. [2021-05-06 05:11:33,226 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 50 transitions. Word has length 22 [2021-05-06 05:11:33,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:33,226 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 50 transitions. [2021-05-06 05:11:33,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-06 05:11:33,226 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 50 transitions. [2021-05-06 05:11:33,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-06 05:11:33,227 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:33,227 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:33,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-06 05:11:33,441 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:33,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:33,441 INFO L82 PathProgramCache]: Analyzing trace with hash 2087529154, now seen corresponding path program 1 times [2021-05-06 05:11:33,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:33,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111672138] [2021-05-06 05:11:33,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:33,448 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:33,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2092320783] [2021-05-06 05:11:33,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:33,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:33,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-06 05:11:33,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:33,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-06 05:11:33,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:33,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111672138] [2021-05-06 05:11:33,557 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:33,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092320783] [2021-05-06 05:11:33,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092320783] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-06 05:11:33,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-06 05:11:33,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-06 05:11:33,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642238735] [2021-05-06 05:11:33,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-06 05:11:33,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:33,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-06 05:11:33,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-06 05:11:33,559 INFO L87 Difference]: Start difference. First operand 41 states and 50 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:11:33,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:33,591 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2021-05-06 05:11:33,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:11:33,591 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2021-05-06 05:11:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:33,593 INFO L225 Difference]: With dead ends: 48 [2021-05-06 05:11:33,593 INFO L226 Difference]: Without dead ends: 43 [2021-05-06 05:11:33,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.1ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:33,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-05-06 05:11:33,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-05-06 05:11:33,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 12 states have call successors, (12), 7 states have call predecessors, (12), 6 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-06 05:11:33,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 48 transitions. [2021-05-06 05:11:33,604 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 48 transitions. Word has length 27 [2021-05-06 05:11:33,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:33,604 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 48 transitions. [2021-05-06 05:11:33,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-05-06 05:11:33,604 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 48 transitions. [2021-05-06 05:11:33,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-06 05:11:33,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:33,605 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:33,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:33,821 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:33,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:33,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2092280728, now seen corresponding path program 1 times [2021-05-06 05:11:33,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:33,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687004372] [2021-05-06 05:11:33,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:33,828 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:33,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1010033065] [2021-05-06 05:11:33,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:33,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:33,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-06 05:11:33,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:33,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:33,976 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-05-06 05:11:33,976 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:33,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687004372] [2021-05-06 05:11:33,976 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:33,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010033065] [2021-05-06 05:11:33,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010033065] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:33,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:33,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:33,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230936345] [2021-05-06 05:11:33,978 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:33,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:33,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:33,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:33,981 INFO L87 Difference]: Start difference. First operand 43 states and 48 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 05:11:34,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:34,056 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-05-06 05:11:34,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:34,056 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2021-05-06 05:11:34,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:34,058 INFO L225 Difference]: With dead ends: 57 [2021-05-06 05:11:34,058 INFO L226 Difference]: Without dead ends: 55 [2021-05-06 05:11:34,058 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.2ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:34,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-05-06 05:11:34,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2021-05-06 05:11:34,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.103448275862069) internal successors, (32), 31 states have internal predecessors, (32), 16 states have call successors, (16), 8 states have call predecessors, (16), 7 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-06 05:11:34,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 62 transitions. [2021-05-06 05:11:34,071 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 62 transitions. Word has length 34 [2021-05-06 05:11:34,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:34,071 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 62 transitions. [2021-05-06 05:11:34,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-05-06 05:11:34,071 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 62 transitions. [2021-05-06 05:11:34,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-05-06 05:11:34,072 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:34,073 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:34,284 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:34,285 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:34,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:34,285 INFO L82 PathProgramCache]: Analyzing trace with hash 398970980, now seen corresponding path program 2 times [2021-05-06 05:11:34,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:34,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623315216] [2021-05-06 05:11:34,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:34,292 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:34,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928315270] [2021-05-06 05:11:34,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:34,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:11:34,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:34,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:11:34,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:34,444 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:34,452 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-05-06 05:11:34,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:34,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623315216] [2021-05-06 05:11:34,452 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:34,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928315270] [2021-05-06 05:11:34,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928315270] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:34,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:34,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:34,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750045607] [2021-05-06 05:11:34,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:34,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:34,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:34,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:34,454 INFO L87 Difference]: Start difference. First operand 53 states and 62 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:11:34,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:34,516 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-05-06 05:11:34,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:34,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 39 [2021-05-06 05:11:34,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:34,517 INFO L225 Difference]: With dead ends: 61 [2021-05-06 05:11:34,517 INFO L226 Difference]: Without dead ends: 59 [2021-05-06 05:11:34,517 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:34,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-05-06 05:11:34,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2021-05-06 05:11:34,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-06 05:11:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 67 transitions. [2021-05-06 05:11:34,523 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 67 transitions. Word has length 39 [2021-05-06 05:11:34,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:34,524 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 67 transitions. [2021-05-06 05:11:34,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-05-06 05:11:34,524 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 67 transitions. [2021-05-06 05:11:34,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-06 05:11:34,525 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:34,525 INFO L523 BasicCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:34,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:34,741 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:34,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:34,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1537313192, now seen corresponding path program 3 times [2021-05-06 05:11:34,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:34,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273954554] [2021-05-06 05:11:34,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:34,748 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:34,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2025161622] [2021-05-06 05:11:34,748 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 [2021-05-06 05:11:34,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-06 05:11:34,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:34,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:11:34,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:34,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:34,894 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-05-06 05:11:34,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:34,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273954554] [2021-05-06 05:11:34,895 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:34,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025161622] [2021-05-06 05:11:34,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025161622] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:34,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:34,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-06 05:11:34,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102464506] [2021-05-06 05:11:34,896 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-06 05:11:34,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:34,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-06 05:11:34,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-06 05:11:34,897 INFO L87 Difference]: Start difference. First operand 58 states and 67 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:11:34,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:34,954 INFO L93 Difference]: Finished difference Result 65 states and 73 transitions. [2021-05-06 05:11:34,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-06 05:11:34,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 44 [2021-05-06 05:11:34,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:34,957 INFO L225 Difference]: With dead ends: 65 [2021-05-06 05:11:34,957 INFO L226 Difference]: Without dead ends: 60 [2021-05-06 05:11:34,957 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:34,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-06 05:11:34,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-05-06 05:11:34,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 36 states have internal predecessors, (37), 15 states have call successors, (15), 10 states have call predecessors, (15), 9 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-06 05:11:34,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2021-05-06 05:11:34,968 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 44 [2021-05-06 05:11:34,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:34,968 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2021-05-06 05:11:34,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-05-06 05:11:34,968 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2021-05-06 05:11:34,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-06 05:11:34,973 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:34,973 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:35,180 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-06 05:11:35,181 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:35,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:35,181 INFO L82 PathProgramCache]: Analyzing trace with hash -463567166, now seen corresponding path program 4 times [2021-05-06 05:11:35,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:35,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901997987] [2021-05-06 05:11:35,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:35,190 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:35,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1752191350] [2021-05-06 05:11:35,190 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:35,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-06 05:11:35,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:35,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-06 05:11:35,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:35,353 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2021-05-06 05:11:35,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:35,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901997987] [2021-05-06 05:11:35,361 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:35,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752191350] [2021-05-06 05:11:35,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752191350] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:35,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:35,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:11:35,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520730503] [2021-05-06 05:11:35,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:11:35,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:35,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:11:35,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:35,363 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 05:11:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:35,434 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-05-06 05:11:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:11:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 51 [2021-05-06 05:11:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:35,435 INFO L225 Difference]: With dead ends: 74 [2021-05-06 05:11:35,435 INFO L226 Difference]: Without dead ends: 72 [2021-05-06 05:11:35,435 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 23.5ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:35,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-06 05:11:35,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2021-05-06 05:11:35,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 40 states have (on average 1.075) internal successors, (43), 42 states have internal predecessors, (43), 19 states have call successors, (19), 11 states have call predecessors, (19), 10 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-06 05:11:35,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2021-05-06 05:11:35,441 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 51 [2021-05-06 05:11:35,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:35,441 INFO L480 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2021-05-06 05:11:35,441 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 05:11:35,441 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2021-05-06 05:11:35,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-06 05:11:35,442 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:35,442 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:35,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:35,654 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:35,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:35,654 INFO L82 PathProgramCache]: Analyzing trace with hash 790038090, now seen corresponding path program 5 times [2021-05-06 05:11:35,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:35,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541461978] [2021-05-06 05:11:35,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:35,660 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:35,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [213339028] [2021-05-06 05:11:35,660 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 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:35,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-06 05:11:35,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:35,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-06 05:11:35,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:35,872 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-05-06 05:11:35,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:35,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541461978] [2021-05-06 05:11:35,881 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:35,881 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213339028] [2021-05-06 05:11:35,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213339028] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:35,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:35,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-06 05:11:35,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211147194] [2021-05-06 05:11:35,881 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-06 05:11:35,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:35,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-06 05:11:35,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-06 05:11:35,882 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 05:11:35,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:35,981 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-05-06 05:11:35,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-06 05:11:35,982 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 56 [2021-05-06 05:11:35,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:35,984 INFO L225 Difference]: With dead ends: 78 [2021-05-06 05:11:35,984 INFO L226 Difference]: Without dead ends: 76 [2021-05-06 05:11:35,985 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.6ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:35,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-06 05:11:35,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-06 05:11:35,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 43 states have (on average 1.069767441860465) internal successors, (46), 45 states have internal predecessors, (46), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2021-05-06 05:11:35,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 84 transitions. [2021-05-06 05:11:35,998 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 84 transitions. Word has length 56 [2021-05-06 05:11:35,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:35,998 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 84 transitions. [2021-05-06 05:11:35,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 4 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-06 05:11:35,998 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 84 transitions. [2021-05-06 05:11:35,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-05-06 05:11:35,998 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:35,999 INFO L523 BasicCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:36,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:36,201 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:36,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:36,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1996886914, now seen corresponding path program 6 times [2021-05-06 05:11:36,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:36,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351819175] [2021-05-06 05:11:36,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:36,219 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:36,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1883839966] [2021-05-06 05:11:36,219 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:36,300 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-06 05:11:36,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:36,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-06 05:11:36,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:36,330 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,380 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,381 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,390 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,427 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,429 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,438 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,479 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:36,490 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-05-06 05:11:36,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:36,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351819175] [2021-05-06 05:11:36,490 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:36,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883839966] [2021-05-06 05:11:36,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883839966] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:36,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:36,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-06 05:11:36,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584814185] [2021-05-06 05:11:36,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-06 05:11:36,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:36,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-06 05:11:36,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-05-06 05:11:36,492 INFO L87 Difference]: Start difference. First operand 75 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 05:11:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:36,664 INFO L93 Difference]: Finished difference Result 86 states and 93 transitions. [2021-05-06 05:11:36,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-06 05:11:36,665 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 61 [2021-05-06 05:11:36,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:36,665 INFO L225 Difference]: With dead ends: 86 [2021-05-06 05:11:36,665 INFO L226 Difference]: Without dead ends: 77 [2021-05-06 05:11:36,667 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-06 05:11:36,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-06 05:11:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-06 05:11:36,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 47 states have internal predecessors, (48), 18 states have call successors, (18), 13 states have call predecessors, (18), 12 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2021-05-06 05:11:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-05-06 05:11:36,674 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 61 [2021-05-06 05:11:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:36,675 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-05-06 05:11:36,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 2.3333333333333335) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2021-05-06 05:11:36,675 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-05-06 05:11:36,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-06 05:11:36,675 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:36,675 INFO L523 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:36,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-06 05:11:36,883 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:36,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:36,883 INFO L82 PathProgramCache]: Analyzing trace with hash -415362136, now seen corresponding path program 7 times [2021-05-06 05:11:36,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:36,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251869683] [2021-05-06 05:11:36,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:36,888 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:36,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [848668263] [2021-05-06 05:11:36,888 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:36,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-06 05:11:36,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-06 05:11:36,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:37,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,145 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 18 proven. 21 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-06 05:11:37,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:37,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251869683] [2021-05-06 05:11:37,145 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:37,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848668263] [2021-05-06 05:11:37,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848668263] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:37,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:37,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-06 05:11:37,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417276195] [2021-05-06 05:11:37,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-06 05:11:37,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:37,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-06 05:11:37,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-05-06 05:11:37,146 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 05:11:37,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:37,235 INFO L93 Difference]: Finished difference Result 91 states and 101 transitions. [2021-05-06 05:11:37,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-06 05:11:37,236 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) Word has length 68 [2021-05-06 05:11:37,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:37,236 INFO L225 Difference]: With dead ends: 91 [2021-05-06 05:11:37,236 INFO L226 Difference]: Without dead ends: 89 [2021-05-06 05:11:37,237 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-06 05:11:37,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-06 05:11:37,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2021-05-06 05:11:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 53 states have internal predecessors, (54), 22 states have call successors, (22), 14 states have call predecessors, (22), 13 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2021-05-06 05:11:37,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 96 transitions. [2021-05-06 05:11:37,246 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 96 transitions. Word has length 68 [2021-05-06 05:11:37,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:37,246 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 96 transitions. [2021-05-06 05:11:37,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 5 states have call successors, (13), 2 states have call predecessors, (13), 1 states have return successors, (11), 4 states have call predecessors, (11), 4 states have call successors, (11) [2021-05-06 05:11:37,246 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 96 transitions. [2021-05-06 05:11:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-05-06 05:11:37,247 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:37,247 INFO L523 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:37,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:37,461 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:37,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:37,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1903584988, now seen corresponding path program 8 times [2021-05-06 05:11:37,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:37,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638305178] [2021-05-06 05:11:37,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:37,470 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:37,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2063722631] [2021-05-06 05:11:37,470 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:37,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-06 05:11:37,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:37,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-06 05:11:37,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:37,545 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,559 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,576 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,591 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,608 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,609 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,678 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:37,688 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 40 proven. 31 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-05-06 05:11:37,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:37,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638305178] [2021-05-06 05:11:37,688 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:37,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063722631] [2021-05-06 05:11:37,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063722631] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:37,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:37,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-06 05:11:37,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143275367] [2021-05-06 05:11:37,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-06 05:11:37,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:37,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-06 05:11:37,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-05-06 05:11:37,689 INFO L87 Difference]: Start difference. First operand 87 states and 96 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 05:11:37,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:37,849 INFO L93 Difference]: Finished difference Result 95 states and 104 transitions. [2021-05-06 05:11:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-06 05:11:37,849 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) Word has length 73 [2021-05-06 05:11:37,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:37,852 INFO L225 Difference]: With dead ends: 95 [2021-05-06 05:11:37,852 INFO L226 Difference]: Without dead ends: 93 [2021-05-06 05:11:37,852 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 69.6ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-05-06 05:11:37,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-06 05:11:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-05-06 05:11:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 56 states have internal predecessors, (57), 23 states have call successors, (23), 15 states have call predecessors, (23), 14 states have return successors, (21), 20 states have call predecessors, (21), 21 states have call successors, (21) [2021-05-06 05:11:37,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-06 05:11:37,868 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 73 [2021-05-06 05:11:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:37,868 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-06 05:11:37,869 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 9 states have internal predecessors, (23), 6 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2021-05-06 05:11:37,869 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-06 05:11:37,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-06 05:11:37,870 INFO L515 BasicCegarLoop]: Found error trace [2021-05-06 05:11:37,870 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-06 05:11:38,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:38,085 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-06 05:11:38,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-06 05:11:38,085 INFO L82 PathProgramCache]: Analyzing trace with hash -2040579864, now seen corresponding path program 9 times [2021-05-06 05:11:38,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-06 05:11:38,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978240744] [2021-05-06 05:11:38,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-06 05:11:38,090 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-06 05:11:38,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1769489210] [2021-05-06 05:11:38,091 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-06 05:11:38,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-06 05:11:38,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-06 05:11:38,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-06 05:11:38,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-06 05:11:38,283 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:38,285 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:42,585 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-05-06 05:11:42,589 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:42,590 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:42,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-06 05:11:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 105 proven. 3 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2021-05-06 05:11:42,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-06 05:11:42,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978240744] [2021-05-06 05:11:42,624 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-06 05:11:42,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769489210] [2021-05-06 05:11:42,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769489210] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-06 05:11:42,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-06 05:11:42,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-06 05:11:42,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955752389] [2021-05-06 05:11:42,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-06 05:11:42,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-06 05:11:42,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-06 05:11:42,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=52, Unknown=1, NotChecked=0, Total=72 [2021-05-06 05:11:42,625 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 05:11:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-06 05:11:42,960 INFO L93 Difference]: Finished difference Result 92 states and 101 transitions. [2021-05-06 05:11:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-06 05:11:42,961 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 78 [2021-05-06 05:11:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-06 05:11:42,961 INFO L225 Difference]: With dead ends: 92 [2021-05-06 05:11:42,961 INFO L226 Difference]: Without dead ends: 0 [2021-05-06 05:11:42,962 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 4318.0ms TimeCoverageRelationStatistics Valid=25, Invalid=64, Unknown=1, NotChecked=0, Total=90 [2021-05-06 05:11:42,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-06 05:11:42,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-06 05:11:42,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-06 05:11:42,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-06 05:11:42,962 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 78 [2021-05-06 05:11:42,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-06 05:11:42,962 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-06 05:11:42,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 4 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-06 05:11:42,963 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-06 05:11:42,963 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-06 05:11:43,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-06 05:11:43,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-06 05:11:43,446 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 24 [2021-05-06 05:11:43,695 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 5) no Hoare annotation was computed. [2021-05-06 05:11:43,695 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 5) no Hoare annotation was computed. [2021-05-06 05:11:43,695 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 5) no Hoare annotation was computed. [2021-05-06 05:11:43,695 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:11:43,695 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|)) [2021-05-06 05:11:43,696 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:11:43,696 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-06 05:11:43,696 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-06 05:11:43,696 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-06 05:11:43,696 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-06 05:11:43,696 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 8 10) the Hoare annotation is: true [2021-05-06 05:11:43,696 INFO L198 CegarLoopUtils]: For program point L9(line 9) no Hoare annotation was computed. [2021-05-06 05:11:43,696 INFO L198 CegarLoopUtils]: For program point L9-2(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:11:43,696 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 8 10) no Hoare annotation was computed. [2021-05-06 05:11:43,696 INFO L198 CegarLoopUtils]: For program point L33(lines 30 42) no Hoare annotation was computed. [2021-05-06 05:11:43,696 INFO L194 CegarLoopUtils]: At program point L31(line 31) the Hoare annotation is: (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) [2021-05-06 05:11:43,696 INFO L194 CegarLoopUtils]: At program point L31-1(line 31) the Hoare annotation is: (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) [2021-05-06 05:11:43,696 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 20 49) no Hoare annotation was computed. [2021-05-06 05:11:43,696 INFO L198 CegarLoopUtils]: For program point L46(line 46) no Hoare annotation was computed. [2021-05-06 05:11:43,696 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 20 49) no Hoare annotation was computed. [2021-05-06 05:11:43,697 INFO L194 CegarLoopUtils]: At program point L44(line 44) the Hoare annotation is: (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) [2021-05-06 05:11:43,697 INFO L194 CegarLoopUtils]: At program point L32(line 32) the Hoare annotation is: (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) [2021-05-06 05:11:43,697 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 20 49) the Hoare annotation is: true [2021-05-06 05:11:43,697 INFO L194 CegarLoopUtils]: At program point L30-2(lines 30 42) the Hoare annotation is: (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) [2021-05-06 05:11:43,697 INFO L194 CegarLoopUtils]: At program point L30-3(lines 30 42) the Hoare annotation is: (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) [2021-05-06 05:11:43,697 INFO L201 CegarLoopUtils]: At program point L24(line 24) the Hoare annotation is: true [2021-05-06 05:11:43,697 INFO L198 CegarLoopUtils]: For program point L24-1(line 24) no Hoare annotation was computed. [2021-05-06 05:11:43,697 INFO L194 CegarLoopUtils]: At program point L45(line 45) the Hoare annotation is: (or (and (= (* main_~s~0 4) (+ (* main_~t~0 main_~t~0) (* main_~t~0 2) 1)) (= (+ (* main_~a~0 2) 1) main_~t~0)) (and (= main_~t~0 1) (= main_~s~0 1)) (and (= main_~t~0 3) (= main_~s~0 (+ main_~t~0 1)))) [2021-05-06 05:11:43,697 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 11 17) the Hoare annotation is: true [2021-05-06 05:11:43,697 INFO L198 CegarLoopUtils]: For program point L13(lines 13 14) no Hoare annotation was computed. [2021-05-06 05:11:43,697 INFO L198 CegarLoopUtils]: For program point L12(lines 12 15) no Hoare annotation was computed. [2021-05-06 05:11:43,697 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:11:43,697 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 11 17) no Hoare annotation was computed. [2021-05-06 05:11:43,698 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 14) no Hoare annotation was computed. [2021-05-06 05:11:43,707 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.05 05:11:43 BoogieIcfgContainer [2021-05-06 05:11:43,707 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-06 05:11:43,708 INFO L168 Benchmark]: Toolchain (without parser) took 11904.57 ms. Allocated memory was 201.3 MB in the beginning and 319.8 MB in the end (delta: 118.5 MB). Free memory was 164.5 MB in the beginning and 287.6 MB in the end (delta: -123.1 MB). Peak memory consumption was 136.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:43,708 INFO L168 Benchmark]: CDTParser took 0.12 ms. Allocated memory is still 201.3 MB. Free memory is still 181.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-06 05:11:43,708 INFO L168 Benchmark]: CACSL2BoogieTranslator took 160.19 ms. Allocated memory is still 201.3 MB. Free memory was 164.4 MB in the beginning and 183.3 MB in the end (delta: -18.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:43,708 INFO L168 Benchmark]: Boogie Preprocessor took 16.93 ms. Allocated memory is still 201.3 MB. Free memory was 183.3 MB in the beginning and 181.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:43,708 INFO L168 Benchmark]: RCFGBuilder took 197.26 ms. Allocated memory is still 201.3 MB. Free memory was 181.7 MB in the beginning and 167.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:43,708 INFO L168 Benchmark]: TraceAbstraction took 11526.59 ms. Allocated memory was 201.3 MB in the beginning and 319.8 MB in the end (delta: 118.5 MB). Free memory was 166.5 MB in the beginning and 287.6 MB in the end (delta: -121.1 MB). Peak memory consumption was 138.9 MB. Max. memory is 8.0 GB. [2021-05-06 05:11:43,708 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12 ms. Allocated memory is still 201.3 MB. Free memory is still 181.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 160.19 ms. Allocated memory is still 201.3 MB. Free memory was 164.4 MB in the beginning and 183.3 MB in the end (delta: -18.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.93 ms. Allocated memory is still 201.3 MB. Free memory was 183.3 MB in the beginning and 181.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 197.26 ms. Allocated memory is still 201.3 MB. Free memory was 181.7 MB in the beginning and 167.0 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 11526.59 ms. Allocated memory was 201.3 MB in the beginning and 319.8 MB in the end (delta: 118.5 MB). Free memory was 166.5 MB in the beginning and 287.6 MB in the end (delta: -121.1 MB). Peak memory consumption was 138.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 14]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 10939.5ms, OverallIterations: 13, TraceHistogramMax: 12, EmptinessCheckTime: 24.1ms, AutomataDifference: 1579.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 531.1ms, InitialAbstractionConstructionTime: 19.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 434 SDtfs, 125 SDslu, 1549 SDs, 0 SdLazy, 1085 SolverSat, 105 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 989.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 576 GetRequests, 494 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 4825.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=92occurred in iteration=12, InterpolantAutomatonStates: 86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 139.6ms AutomataMinimizationTime, 13 MinimizatonAttempts, 12 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 14 LocationsWithAnnotation, 48 PreInvPairs, 82 NumberOfFragments, 194 HoareAnnotationTreeSize, 48 FomulaSimplifications, 14442 FormulaSimplificationTreeSizeReduction, 117.0ms HoareSimplificationTime, 14 FomulaSimplificationsInter, 3052 FormulaSimplificationTreeSizeReductionInter, 405.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 97.8ms SsaConstructionTime, 366.8ms SatisfiabilityAnalysisTime, 5849.8ms InterpolantComputationTime, 587 NumberOfCodeBlocks, 538 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 574 ConstructedInterpolants, 0 QuantifiedInterpolants, 1673 SizeOfPredicates, 22 NumberOfNonLiveVariables, 1738 ConjunctsInSsa, 192 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 1028/1126 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: 30]: Loop Invariant Derived loop invariant: s * 4 == t * t + t * 2 + 1 && a * 2 + 1 == t RESULT: Ultimate proved your program to be correct! Received shutdown request...