/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/cohencu-ll_valuebound1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 13:58:18,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 13:58:18,084 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 13:58:18,108 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 13:58:18,125 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 13:58:18,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 13:58:18,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 13:58:18,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 13:58:18,130 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 13:58:18,130 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 13:58:18,133 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 13:58:18,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 13:58:18,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 13:58:18,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 13:58:18,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 13:58:18,153 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 13:58:18,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 13:58:18,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 13:58:18,164 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 13:58:18,164 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 13:58:18,167 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2021-05-02 13:58:18,194 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 13:58:18,194 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 13:58:18,196 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 13:58:18,196 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 13:58:18,196 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 13:58:18,196 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 13:58:18,196 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 13:58:18,196 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 13:58:18,196 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 13:58:18,197 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 13:58:18,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 13:58:18,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 13:58:18,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 13:58:18,198 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 13:58:18,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 13:58:18,198 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 13:58:18,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 13:58:18,198 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 13:58:18,198 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 13:58:18,198 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 13:58:18,198 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:58:18,198 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 13:58:18,199 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 13:58:18,199 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 13:58:18,199 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 13:58:18,199 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 13:58:18,199 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 13:58:18,199 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 13:58:18,199 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 13:58:18,434 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 13:58:18,452 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 13:58:18,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 13:58:18,454 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 13:58:18,455 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 13:58:18,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c [2021-05-02 13:58:18,500 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38b899ac4/5695f68906044b0fb81a1c5dfc450029/FLAGd09face0d [2021-05-02 13:58:18,809 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 13:58:18,809 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/cohencu-ll_valuebound1.c [2021-05-02 13:58:18,813 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38b899ac4/5695f68906044b0fb81a1c5dfc450029/FLAGd09face0d [2021-05-02 13:58:19,225 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/38b899ac4/5695f68906044b0fb81a1c5dfc450029 [2021-05-02 13:58:19,226 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 13:58:19,227 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 13:58:19,228 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 13:58:19,228 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 13:58:19,232 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 13:58:19,233 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:58:19" (1/1) ... [2021-05-02 13:58:19,233 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c0ffc4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:58:19, skipping insertion in model container [2021-05-02 13:58:19,234 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 01:58:19" (1/1) ... [2021-05-02 13:58:19,237 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 13:58:19,248 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 13:58:19,322 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/cohencu-ll_valuebound1.c[596,609] [2021-05-02 13:58:19,334 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:58:19,339 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 13:58:19,346 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/cohencu-ll_valuebound1.c[596,609] [2021-05-02 13:58:19,353 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 13:58:19,361 INFO L208 MainTranslator]: Completed translation [2021-05-02 13:58:19,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:58:19 WrapperNode [2021-05-02 13:58:19,362 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 13:58:19,362 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 13:58:19,362 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 13:58:19,362 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 13:58:19,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:58:19" (1/1) ... [2021-05-02 13:58:19,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:58:19" (1/1) ... [2021-05-02 13:58:19,373 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:58:19" (1/1) ... [2021-05-02 13:58:19,373 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:58:19" (1/1) ... [2021-05-02 13:58:19,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:58:19" (1/1) ... [2021-05-02 13:58:19,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:58:19" (1/1) ... [2021-05-02 13:58:19,379 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:58:19" (1/1) ... [2021-05-02 13:58:19,380 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 13:58:19,381 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 13:58:19,381 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 13:58:19,381 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 13:58:19,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:58:19" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 13:58:19,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 13:58:19,470 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 13:58:19,470 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 13:58:19,470 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 13:58:19,471 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 13:58:19,471 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 13:58:19,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 13:58:19,471 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 13:58:19,471 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 13:58:19,472 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 13:58:19,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_unsigned_short [2021-05-02 13:58:19,472 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 13:58:19,472 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 13:58:19,472 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 13:58:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 13:58:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 13:58:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 13:58:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 13:58:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 13:58:19,474 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 13:58:19,690 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 13:58:19,691 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 13:58:19,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:58:19 BoogieIcfgContainer [2021-05-02 13:58:19,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 13:58:19,693 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 13:58:19,693 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 13:58:19,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 13:58:19,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 01:58:19" (1/3) ... [2021-05-02 13:58:19,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd74277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:58:19, skipping insertion in model container [2021-05-02 13:58:19,695 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 01:58:19" (2/3) ... [2021-05-02 13:58:19,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2dd74277 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 01:58:19, skipping insertion in model container [2021-05-02 13:58:19,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 01:58:19" (3/3) ... [2021-05-02 13:58:19,696 INFO L111 eAbstractionObserver]: Analyzing ICFG cohencu-ll_valuebound1.c [2021-05-02 13:58:19,700 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 13:58:19,702 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 13:58:19,711 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 13:58:19,726 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 13:58:19,726 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 13:58:19,726 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 13:58:19,726 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 13:58:19,726 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 13:58:19,726 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 13:58:19,726 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 13:58:19,726 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 13:58:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2021-05-02 13:58:19,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:58:19,739 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:19,740 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:19,740 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:19,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:19,752 INFO L82 PathProgramCache]: Analyzing trace with hash 503189915, now seen corresponding path program 1 times [2021-05-02 13:58:19,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:19,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832808901] [2021-05-02 13:58:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:19,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:19,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:58:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:19,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:58:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:58:19,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:19,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832808901] [2021-05-02 13:58:19,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832808901] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:58:19,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:58:19,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 13:58:19,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886422078] [2021-05-02 13:58:19,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 13:58:19,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:19,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 13:58:19,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:58:19,951 INFO L87 Difference]: Start difference. First operand has 36 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 14 states have call successors, (14), 4 states have call predecessors, (14), 4 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Second operand has 3 states, 3 states have (on average 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) [2021-05-02 13:58:20,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:20,148 INFO L93 Difference]: Finished difference Result 63 states and 101 transitions. [2021-05-02 13:58:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 13:58:20,152 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 [2021-05-02 13:58:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:20,156 INFO L225 Difference]: With dead ends: 63 [2021-05-02 13:58:20,157 INFO L226 Difference]: Without dead ends: 31 [2021-05-02 13:58:20,163 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 13:58:20,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-05-02 13:58:20,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-05-02 13:58:20,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 14 states have internal predecessors, (15), 14 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 13:58:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 41 transitions. [2021-05-02 13:58:20,192 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 41 transitions. Word has length 17 [2021-05-02 13:58:20,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:20,192 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 41 transitions. [2021-05-02 13:58:20,192 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) [2021-05-02 13:58:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 41 transitions. [2021-05-02 13:58:20,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 13:58:20,193 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:20,193 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:20,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 13:58:20,193 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:20,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:20,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1171868123, now seen corresponding path program 1 times [2021-05-02 13:58:20,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:20,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006607093] [2021-05-02 13:58:20,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:20,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:20,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 13:58:20,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:20,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 13:58:20,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:58:20,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:20,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006607093] [2021-05-02 13:58:20,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006607093] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:58:20,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:58:20,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 13:58:20,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999037779] [2021-05-02 13:58:20,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 13:58:20,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:20,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 13:58:20,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 13:58:20,332 INFO L87 Difference]: Start difference. First operand 31 states and 41 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) [2021-05-02 13:58:20,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:20,564 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2021-05-02 13:58:20,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:58:20,565 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 [2021-05-02 13:58:20,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:20,566 INFO L225 Difference]: With dead ends: 37 [2021-05-02 13:58:20,566 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 13:58:20,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:58:20,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 13:58:20,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-05-02 13:58:20,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 14 states have call successors, (14), 5 states have call predecessors, (14), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 13:58:20,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-05-02 13:58:20,574 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 17 [2021-05-02 13:58:20,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:20,575 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-05-02 13:58:20,575 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) [2021-05-02 13:58:20,575 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-05-02 13:58:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 13:58:20,575 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:20,575 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] [2021-05-02 13:58:20,576 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 13:58:20,576 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:20,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:20,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1781524074, now seen corresponding path program 1 times [2021-05-02 13:58:20,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:20,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479714770] [2021-05-02 13:58:20,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:20,585 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:20,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [505340870] [2021-05-02 13:58:20,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:20,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:20,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:58:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 13:58:20,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:20,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479714770] [2021-05-02 13:58:20,767 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:20,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505340870] [2021-05-02 13:58:20,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505340870] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:20,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:20,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:58:20,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995282209] [2021-05-02 13:58:20,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:58:20,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:20,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:58:20,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:58:20,771 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:58:20,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:20,941 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2021-05-02 13:58:20,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:58:20,942 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 13:58:20,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:20,943 INFO L225 Difference]: With dead ends: 58 [2021-05-02 13:58:20,943 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 13:58:20,943 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:58:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 13:58:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 13:58:20,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 24 states have (on average 1.125) internal successors, (27), 26 states have internal predecessors, (27), 24 states have call successors, (24), 7 states have call predecessors, (24), 6 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 13:58:20,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2021-05-02 13:58:20,952 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 22 [2021-05-02 13:58:20,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:20,953 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2021-05-02 13:58:20,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 13:58:20,953 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2021-05-02 13:58:20,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-05-02 13:58:20,953 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:20,953 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] [2021-05-02 13:58:21,168 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 13:58:21,171 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:21,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:21,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1241120379, now seen corresponding path program 1 times [2021-05-02 13:58:21,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:21,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380801190] [2021-05-02 13:58:21,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:21,183 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:21,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [770719121] [2021-05-02 13:58:21,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:21,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:21,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 13:58:21,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:21,300 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 13:58:21,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:21,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380801190] [2021-05-02 13:58:21,300 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:21,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770719121] [2021-05-02 13:58:21,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770719121] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:21,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:21,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:58:21,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395783339] [2021-05-02 13:58:21,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:58:21,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:21,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:58:21,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:58:21,302 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:58:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:21,442 INFO L93 Difference]: Finished difference Result 62 states and 79 transitions. [2021-05-02 13:58:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:58:21,443 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-05-02 13:58:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:21,444 INFO L225 Difference]: With dead ends: 62 [2021-05-02 13:58:21,444 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 13:58:21,445 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 38.3ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:58:21,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 13:58:21,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 13:58:21,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 29 states have internal predecessors, (30), 24 states have call successors, (24), 8 states have call predecessors, (24), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-05-02 13:58:21,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 76 transitions. [2021-05-02 13:58:21,461 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 76 transitions. Word has length 27 [2021-05-02 13:58:21,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:21,461 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 76 transitions. [2021-05-02 13:58:21,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 13:58:21,461 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 76 transitions. [2021-05-02 13:58:21,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 13:58:21,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:21,462 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:21,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:21,663 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:21,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:21,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1598126198, now seen corresponding path program 1 times [2021-05-02 13:58:21,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:21,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758814028] [2021-05-02 13:58:21,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:21,682 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:21,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [217641504] [2021-05-02 13:58:21,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:21,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:21,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 13:58:21,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:21,823 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 13:58:21,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:21,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758814028] [2021-05-02 13:58:21,824 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217641504] [2021-05-02 13:58:21,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217641504] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:21,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:21,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 13:58:21,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806796678] [2021-05-02 13:58:21,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:58:21,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:21,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:58:21,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:58:21,825 INFO L87 Difference]: Start difference. First operand 59 states and 76 transitions. Second operand has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 13:58:21,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:21,989 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2021-05-02 13:58:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 13:58:21,990 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) Word has length 32 [2021-05-02 13:58:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:21,991 INFO L225 Difference]: With dead ends: 66 [2021-05-02 13:58:21,991 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 13:58:21,991 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:58:21,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 13:58:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-05-02 13:58:21,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 19 states have call successors, (19), 9 states have call predecessors, (19), 8 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-05-02 13:58:21,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 68 transitions. [2021-05-02 13:58:21,998 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 68 transitions. Word has length 32 [2021-05-02 13:58:21,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:21,999 INFO L480 AbstractCegarLoop]: Abstraction has 58 states and 68 transitions. [2021-05-02 13:58:21,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 6 states have internal predecessors, (17), 3 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 2 states have call predecessors, (5), 3 states have call successors, (5) [2021-05-02 13:58:21,999 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 68 transitions. [2021-05-02 13:58:21,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-05-02 13:58:21,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:22,000 INFO L523 BasicCegarLoop]: trace histogram [7, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:22,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:22,214 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:22,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:22,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1002403483, now seen corresponding path program 1 times [2021-05-02 13:58:22,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:22,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391994995] [2021-05-02 13:58:22,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:22,222 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:22,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [723707460] [2021-05-02 13:58:22,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:22,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:22,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 13:58:22,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:22,375 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 26 proven. 4 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-05-02 13:58:22,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:22,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391994995] [2021-05-02 13:58:22,375 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:22,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723707460] [2021-05-02 13:58:22,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723707460] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:22,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:22,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:58:22,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133859845] [2021-05-02 13:58:22,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:58:22,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:22,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:58:22,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:58:22,377 INFO L87 Difference]: Start difference. First operand 58 states and 68 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 13:58:22,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:22,549 INFO L93 Difference]: Finished difference Result 81 states and 100 transitions. [2021-05-02 13:58:22,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:58:22,554 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 49 [2021-05-02 13:58:22,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:22,555 INFO L225 Difference]: With dead ends: 81 [2021-05-02 13:58:22,555 INFO L226 Difference]: Without dead ends: 79 [2021-05-02 13:58:22,555 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.7ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:58:22,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-05-02 13:58:22,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-05-02 13:58:22,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 40 states have internal predecessors, (41), 29 states have call successors, (29), 11 states have call predecessors, (29), 10 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 13:58:22,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 97 transitions. [2021-05-02 13:58:22,563 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 97 transitions. Word has length 49 [2021-05-02 13:58:22,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:22,564 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 97 transitions. [2021-05-02 13:58:22,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-05-02 13:58:22,564 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 97 transitions. [2021-05-02 13:58:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 13:58:22,572 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:22,572 INFO L523 BasicCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:22,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:22,777 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:22,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:22,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1130038122, now seen corresponding path program 2 times [2021-05-02 13:58:22,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:22,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490323157] [2021-05-02 13:58:22,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:22,784 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:22,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548821412] [2021-05-02 13:58:22,784 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:22,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:58:22,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:58:22,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-02 13:58:22,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 28 proven. 8 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-05-02 13:58:22,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:22,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490323157] [2021-05-02 13:58:22,960 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:22,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548821412] [2021-05-02 13:58:22,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548821412] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:22,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:22,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 13:58:22,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245019178] [2021-05-02 13:58:22,961 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 13:58:22,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:22,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 13:58:22,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:58:22,961 INFO L87 Difference]: Start difference. First operand 78 states and 97 transitions. Second operand has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 13:58:23,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:23,142 INFO L93 Difference]: Finished difference Result 85 states and 103 transitions. [2021-05-02 13:58:23,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:58:23,143 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) Word has length 54 [2021-05-02 13:58:23,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:23,144 INFO L225 Difference]: With dead ends: 85 [2021-05-02 13:58:23,144 INFO L226 Difference]: Without dead ends: 81 [2021-05-02 13:58:23,144 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:58:23,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-05-02 13:58:23,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-05-02 13:58:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 43 states have internal predecessors, (44), 28 states have call successors, (28), 12 states have call predecessors, (28), 11 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 13:58:23,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2021-05-02 13:58:23,152 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 54 [2021-05-02 13:58:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:23,152 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2021-05-02 13:58:23,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 4 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (9), 3 states have call predecessors, (9), 4 states have call successors, (9) [2021-05-02 13:58:23,152 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2021-05-02 13:58:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-05-02 13:58:23,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:23,153 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:23,370 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 13:58:23,371 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:23,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:23,371 INFO L82 PathProgramCache]: Analyzing trace with hash -310331719, now seen corresponding path program 1 times [2021-05-02 13:58:23,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:23,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580923126] [2021-05-02 13:58:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:23,394 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:23,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [949271858] [2021-05-02 13:58:23,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:23,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-02 13:58:23,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:23,483 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,485 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,497 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,499 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,508 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,516 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,518 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,526 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,549 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,550 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,551 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,552 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,560 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,563 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,571 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,572 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,573 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,584 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,592 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,593 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,612 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,625 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,626 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,635 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,636 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,643 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:23,659 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 22 proven. 7 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2021-05-02 13:58:23,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:23,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580923126] [2021-05-02 13:58:23,660 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:23,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949271858] [2021-05-02 13:58:23,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949271858] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:23,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:23,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:58:23,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659014315] [2021-05-02 13:58:23,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:58:23,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:23,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:58:23,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:58:23,661 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 13:58:23,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:23,807 INFO L93 Difference]: Finished difference Result 91 states and 105 transitions. [2021-05-02 13:58:23,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:58:23,808 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) Word has length 75 [2021-05-02 13:58:23,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:23,812 INFO L225 Difference]: With dead ends: 91 [2021-05-02 13:58:23,812 INFO L226 Difference]: Without dead ends: 89 [2021-05-02 13:58:23,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-05-02 13:58:23,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-05-02 13:58:23,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-05-02 13:58:23,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 49 states have internal predecessors, (50), 28 states have call successors, (28), 14 states have call predecessors, (28), 13 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2021-05-02 13:58:23,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 103 transitions. [2021-05-02 13:58:23,828 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 103 transitions. Word has length 75 [2021-05-02 13:58:23,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:23,828 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 103 transitions. [2021-05-02 13:58:23,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 5 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 13:58:23,828 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 103 transitions. [2021-05-02 13:58:23,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 13:58:23,833 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:23,833 INFO L523 BasicCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:24,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:24,034 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:24,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:24,034 INFO L82 PathProgramCache]: Analyzing trace with hash -63758730, now seen corresponding path program 3 times [2021-05-02 13:58:24,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:24,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442590425] [2021-05-02 13:58:24,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:24,041 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:24,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110840777] [2021-05-02 13:58:24,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:24,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 13:58:24,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:58:24,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:58:24,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:24,094 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,095 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 51 proven. 14 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-05-02 13:58:24,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:24,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442590425] [2021-05-02 13:58:24,243 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:24,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110840777] [2021-05-02 13:58:24,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2110840777] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:24,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:24,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:58:24,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495507476] [2021-05-02 13:58:24,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:58:24,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:24,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:58:24,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:58:24,244 INFO L87 Difference]: Start difference. First operand 89 states and 103 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 13:58:24,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:24,464 INFO L93 Difference]: Finished difference Result 112 states and 135 transitions. [2021-05-02 13:58:24,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:58:24,464 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 76 [2021-05-02 13:58:24,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:24,465 INFO L225 Difference]: With dead ends: 112 [2021-05-02 13:58:24,465 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 13:58:24,466 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:58:24,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 13:58:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 13:58:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 58 states have internal predecessors, (59), 38 states have call successors, (38), 16 states have call predecessors, (38), 15 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 13:58:24,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2021-05-02 13:58:24,474 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 76 [2021-05-02 13:58:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:24,474 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2021-05-02 13:58:24,474 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, (15), 2 states have call predecessors, (15), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2021-05-02 13:58:24,475 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2021-05-02 13:58:24,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 13:58:24,475 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:24,475 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:24,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 13:58:24,691 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:24,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:24,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1701746168, now seen corresponding path program 1 times [2021-05-02 13:58:24,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:24,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907576166] [2021-05-02 13:58:24,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:24,697 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:24,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1802371450] [2021-05-02 13:58:24,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:24,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:24,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 13:58:24,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:24,794 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,806 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,807 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,830 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,857 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,858 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,865 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,867 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,868 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,875 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,876 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,877 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,886 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,888 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,890 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,902 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,903 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,904 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,911 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,936 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,937 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,942 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,950 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:24,967 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-05-02 13:58:24,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:24,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907576166] [2021-05-02 13:58:24,967 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:24,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802371450] [2021-05-02 13:58:24,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802371450] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:24,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:24,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:58:24,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635876598] [2021-05-02 13:58:24,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:58:24,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:24,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:58:24,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:58:24,969 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 13:58:25,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:25,106 INFO L93 Difference]: Finished difference Result 115 states and 137 transitions. [2021-05-02 13:58:25,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 13:58:25,106 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) Word has length 80 [2021-05-02 13:58:25,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:25,108 INFO L225 Difference]: With dead ends: 115 [2021-05-02 13:58:25,108 INFO L226 Difference]: Without dead ends: 113 [2021-05-02 13:58:25,108 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 77.7ms TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-05-02 13:58:25,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-05-02 13:58:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2021-05-02 13:58:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 61 states have internal predecessors, (62), 38 states have call successors, (38), 17 states have call predecessors, (38), 16 states have return successors, (35), 34 states have call predecessors, (35), 35 states have call successors, (35) [2021-05-02 13:58:25,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 135 transitions. [2021-05-02 13:58:25,117 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 135 transitions. Word has length 80 [2021-05-02 13:58:25,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:25,117 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 135 transitions. [2021-05-02 13:58:25,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 5 states have call predecessors, (14), 4 states have call successors, (14) [2021-05-02 13:58:25,117 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 135 transitions. [2021-05-02 13:58:25,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-05-02 13:58:25,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:25,118 INFO L523 BasicCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:25,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-05-02 13:58:25,335 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:25,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:25,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1156119141, now seen corresponding path program 4 times [2021-05-02 13:58:25,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:25,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137462390] [2021-05-02 13:58:25,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:25,341 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:25,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2101031493] [2021-05-02 13:58:25,342 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:25,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 13:58:25,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:58:25,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 13:58:25,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 38 proven. 34 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-05-02 13:58:25,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:25,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137462390] [2021-05-02 13:58:25,541 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:25,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101031493] [2021-05-02 13:58:25,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101031493] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:25,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:25,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:58:25,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86412045] [2021-05-02 13:58:25,541 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:58:25,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:25,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:58:25,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:58:25,542 INFO L87 Difference]: Start difference. First operand 113 states and 135 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 13:58:25,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:25,763 INFO L93 Difference]: Finished difference Result 120 states and 141 transitions. [2021-05-02 13:58:25,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:58:25,764 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) Word has length 81 [2021-05-02 13:58:25,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:25,766 INFO L225 Difference]: With dead ends: 120 [2021-05-02 13:58:25,766 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 13:58:25,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:58:25,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 13:58:25,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-02 13:58:25,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 57 states have internal predecessors, (58), 34 states have call successors, (34), 16 states have call predecessors, (34), 15 states have return successors, (32), 31 states have call predecessors, (32), 32 states have call successors, (32) [2021-05-02 13:58:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 124 transitions. [2021-05-02 13:58:25,779 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 124 transitions. Word has length 81 [2021-05-02 13:58:25,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:25,780 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 124 transitions. [2021-05-02 13:58:25,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 8 states have internal predecessors, (21), 5 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (14), 4 states have call predecessors, (14), 5 states have call successors, (14) [2021-05-02 13:58:25,780 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 124 transitions. [2021-05-02 13:58:25,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 13:58:25,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:25,781 INFO L523 BasicCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:26,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:26,000 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:26,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:26,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1087104342, now seen corresponding path program 5 times [2021-05-02 13:58:26,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:26,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339946815] [2021-05-02 13:58:26,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:26,009 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:26,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [729850124] [2021-05-02 13:58:26,010 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:26,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-02 13:58:26,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:58:26,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 45 conjunts are in the unsatisfiable core [2021-05-02 13:58:26,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:26,280 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 83 proven. 50 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-05-02 13:58:26,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:26,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339946815] [2021-05-02 13:58:26,280 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:26,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729850124] [2021-05-02 13:58:26,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729850124] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:26,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:26,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 13:58:26,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275072285] [2021-05-02 13:58:26,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 13:58:26,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:26,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 13:58:26,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-05-02 13:58:26,282 INFO L87 Difference]: Start difference. First operand 105 states and 124 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, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 13:58:26,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:26,520 INFO L93 Difference]: Finished difference Result 112 states and 130 transitions. [2021-05-02 13:58:26,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 13:58:26,521 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, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) Word has length 86 [2021-05-02 13:58:26,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:26,522 INFO L225 Difference]: With dead ends: 112 [2021-05-02 13:58:26,522 INFO L226 Difference]: Without dead ends: 107 [2021-05-02 13:58:26,522 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:58:26,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-05-02 13:58:26,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-05-02 13:58:26,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 60 states have internal predecessors, (61), 32 states have call successors, (32), 17 states have call predecessors, (32), 16 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 13:58:26,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 122 transitions. [2021-05-02 13:58:26,532 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 122 transitions. Word has length 86 [2021-05-02 13:58:26,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:26,532 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 122 transitions. [2021-05-02 13:58:26,532 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, (17), 2 states have call predecessors, (17), 2 states have return successors, (15), 4 states have call predecessors, (15), 5 states have call successors, (15) [2021-05-02 13:58:26,532 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 122 transitions. [2021-05-02 13:58:26,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 13:58:26,533 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:26,533 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:26,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:26,737 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:26,737 INFO L82 PathProgramCache]: Analyzing trace with hash 511374036, now seen corresponding path program 2 times [2021-05-02 13:58:26,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:26,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798399697] [2021-05-02 13:58:26,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:26,742 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:26,743 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [752086105] [2021-05-02 13:58:26,743 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 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 [2021-05-02 13:58:26,801 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:58:26,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:58:26,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-02 13:58:26,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:26,840 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,841 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,847 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,848 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,855 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,862 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,863 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,869 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,870 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,894 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,895 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,921 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,922 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,928 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,929 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,938 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,939 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,945 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,946 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,968 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,969 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,975 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,976 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,982 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,983 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,990 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:26,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,011 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,012 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,020 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,021 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,028 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,031 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,047 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 46 proven. 52 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-05-02 13:58:27,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:27,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798399697] [2021-05-02 13:58:27,049 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:27,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752086105] [2021-05-02 13:58:27,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752086105] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:27,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:27,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:58:27,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540887857] [2021-05-02 13:58:27,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:58:27,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:27,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:58:27,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:58:27,050 INFO L87 Difference]: Start difference. First operand 107 states and 122 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-05-02 13:58:27,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:27,271 INFO L93 Difference]: Finished difference Result 113 states and 127 transitions. [2021-05-02 13:58:27,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:58:27,272 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) Word has length 102 [2021-05-02 13:58:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:27,272 INFO L225 Difference]: With dead ends: 113 [2021-05-02 13:58:27,272 INFO L226 Difference]: Without dead ends: 111 [2021-05-02 13:58:27,273 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 84.7ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:58:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-05-02 13:58:27,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2021-05-02 13:58:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 63 states have internal predecessors, (64), 32 states have call successors, (32), 18 states have call predecessors, (32), 17 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 13:58:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 125 transitions. [2021-05-02 13:58:27,279 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 125 transitions. Word has length 102 [2021-05-02 13:58:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:27,280 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 125 transitions. [2021-05-02 13:58:27,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (18), 5 states have call predecessors, (18), 4 states have call successors, (18) [2021-05-02 13:58:27,280 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 125 transitions. [2021-05-02 13:58:27,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-05-02 13:58:27,280 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:27,281 INFO L523 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:27,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-05-02 13:58:27,498 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:27,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:27,498 INFO L82 PathProgramCache]: Analyzing trace with hash -360684101, now seen corresponding path program 6 times [2021-05-02 13:58:27,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:27,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354641083] [2021-05-02 13:58:27,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:27,503 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:27,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509153359] [2021-05-02 13:58:27,503 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:27,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-02 13:58:27,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:58:27,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 29 conjunts are in the unsatisfiable core [2021-05-02 13:58:27,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:27,594 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,595 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,601 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,647 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,648 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,761 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,762 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,769 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,780 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,781 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:27,814 INFO L134 CoverageAnalysis]: Checked inductivity of 542 backedges. 125 proven. 2 refuted. 0 times theorem prover too weak. 415 trivial. 0 not checked. [2021-05-02 13:58:27,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:27,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354641083] [2021-05-02 13:58:27,814 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:27,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509153359] [2021-05-02 13:58:27,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509153359] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:27,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:27,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 13:58:27,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093867928] [2021-05-02 13:58:27,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 13:58:27,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:27,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 13:58:27,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-05-02 13:58:27,815 INFO L87 Difference]: Start difference. First operand 111 states and 125 transitions. Second operand has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 13:58:34,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:34,205 INFO L93 Difference]: Finished difference Result 117 states and 130 transitions. [2021-05-02 13:58:34,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:58:34,205 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 103 [2021-05-02 13:58:34,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:34,206 INFO L225 Difference]: With dead ends: 117 [2021-05-02 13:58:34,206 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 13:58:34,206 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 134.0ms TimeCoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2021-05-02 13:58:34,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 13:58:34,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2021-05-02 13:58:34,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 64 states have (on average 1.046875) internal successors, (67), 66 states have internal predecessors, (67), 32 states have call successors, (32), 19 states have call predecessors, (32), 18 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-05-02 13:58:34,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 128 transitions. [2021-05-02 13:58:34,215 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 128 transitions. Word has length 103 [2021-05-02 13:58:34,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:34,215 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 128 transitions. [2021-05-02 13:58:34,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-05-02 13:58:34,215 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 128 transitions. [2021-05-02 13:58:34,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-05-02 13:58:34,216 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:34,216 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:34,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-02 13:58:34,432 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:34,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1368175293, now seen corresponding path program 2 times [2021-05-02 13:58:34,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:34,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410012462] [2021-05-02 13:58:34,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:34,437 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:34,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1641385962] [2021-05-02 13:58:34,437 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:34,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 13:58:34,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 13:58:34,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-02 13:58:34,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:34,527 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,528 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,534 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,535 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,546 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,547 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,553 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,554 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,561 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,562 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,582 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,583 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,606 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,607 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,614 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,628 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,666 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,673 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,674 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,689 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,690 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,703 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,704 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:34,724 INFO L134 CoverageAnalysis]: Checked inductivity of 599 backedges. 48 proven. 55 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2021-05-02 13:58:34,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:34,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410012462] [2021-05-02 13:58:34,724 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:34,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641385962] [2021-05-02 13:58:34,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1641385962] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 13:58:34,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 13:58:34,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 13:58:34,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576847289] [2021-05-02 13:58:34,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 13:58:34,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:34,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 13:58:34,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-02 13:58:34,727 INFO L87 Difference]: Start difference. First operand 115 states and 128 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2021-05-02 13:58:34,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:34,978 INFO L93 Difference]: Finished difference Result 125 states and 136 transitions. [2021-05-02 13:58:34,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 13:58:34,979 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) Word has length 107 [2021-05-02 13:58:34,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:34,979 INFO L225 Difference]: With dead ends: 125 [2021-05-02 13:58:34,980 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 13:58:34,983 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-05-02 13:58:34,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 13:58:34,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2021-05-02 13:58:34,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 29 states have call successors, (29), 19 states have call predecessors, (29), 18 states have return successors, (27), 27 states have call predecessors, (27), 27 states have call successors, (27) [2021-05-02 13:58:34,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 122 transitions. [2021-05-02 13:58:34,994 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 122 transitions. Word has length 107 [2021-05-02 13:58:34,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:34,996 INFO L480 AbstractCegarLoop]: Abstraction has 112 states and 122 transitions. [2021-05-02 13:58:34,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 4 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 5 states have call predecessors, (19), 4 states have call successors, (19) [2021-05-02 13:58:34,996 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 122 transitions. [2021-05-02 13:58:34,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 13:58:34,997 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 13:58:34,997 INFO L523 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 13:58:35,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-05-02 13:58:35,215 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 13:58:35,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 13:58:35,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1388085622, now seen corresponding path program 7 times [2021-05-02 13:58:35,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 13:58:35,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150740944] [2021-05-02 13:58:35,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 13:58:35,222 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 13:58:35,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45923619] [2021-05-02 13:58:35,223 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 13:58:35,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 13:58:35,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 13:58:35,304 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,305 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,313 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,314 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,322 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,331 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,339 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,340 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,341 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,349 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,360 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,361 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,362 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,369 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,370 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,377 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,378 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,387 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,388 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,395 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,396 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,403 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,405 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,416 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,417 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,418 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,425 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,426 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,433 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,434 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,435 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,441 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,442 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,443 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,450 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,451 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,458 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,459 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,460 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 13:58:35,473 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 183 proven. 0 refuted. 0 times theorem prover too weak. 428 trivial. 0 not checked. [2021-05-02 13:58:35,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 13:58:35,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150740944] [2021-05-02 13:58:35,474 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 13:58:35,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45923619] [2021-05-02 13:58:35,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45923619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 13:58:35,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 13:58:35,474 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 13:58:35,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754276330] [2021-05-02 13:58:35,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 13:58:35,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 13:58:35,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 13:58:35,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-05-02 13:58:35,475 INFO L87 Difference]: Start difference. First operand 112 states and 122 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 13:58:35,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 13:58:35,523 INFO L93 Difference]: Finished difference Result 112 states and 122 transitions. [2021-05-02 13:58:35,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 13:58:35,524 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) Word has length 108 [2021-05-02 13:58:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 13:58:35,524 INFO L225 Difference]: With dead ends: 112 [2021-05-02 13:58:35,524 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 13:58:35,525 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.7ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-05-02 13:58:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 13:58:35,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 13:58:35,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 13:58:35,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 13:58:35,526 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2021-05-02 13:58:35,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 13:58:35,526 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 13:58:35,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 5 states have call successors, (21), 2 states have call predecessors, (21), 3 states have return successors, (19), 6 states have call predecessors, (19), 5 states have call successors, (19) [2021-05-02 13:58:35,526 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 13:58:35,526 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 13:58:35,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 13:58:35,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 13:58:38,029 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 112 DAG size of output: 37 [2021-05-02 13:58:38,196 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 37 [2021-05-02 13:58:40,342 WARN L205 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 112 DAG size of output: 37 [2021-05-02 13:58:42,476 WARN L205 SmtUtils]: Spent 2.13 s on a formula simplification. DAG size of input: 112 DAG size of output: 37 [2021-05-02 13:58:44,663 WARN L205 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 112 DAG size of output: 37 [2021-05-02 13:58:44,874 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 36 [2021-05-02 13:58:45,177 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 36 [2021-05-02 13:58:45,404 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 37 [2021-05-02 13:58:45,407 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 8) no Hoare annotation was computed. [2021-05-02 13:58:45,407 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 8) no Hoare annotation was computed. [2021-05-02 13:58:45,407 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 8) no Hoare annotation was computed. [2021-05-02 13:58:45,407 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:58:45,407 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 13:58:45,407 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:58:45,407 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 13:58:45,407 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 13:58:45,407 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 13:58:45,407 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 13:58:45,408 INFO L201 CegarLoopUtils]: At program point assume_abort_if_notENTRY(lines 11 13) the Hoare annotation is: true [2021-05-02 13:58:45,408 INFO L198 CegarLoopUtils]: For program point L12(line 12) no Hoare annotation was computed. [2021-05-02 13:58:45,408 INFO L198 CegarLoopUtils]: For program point L12-2(lines 11 13) no Hoare annotation was computed. [2021-05-02 13:58:45,408 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 11 13) no Hoare annotation was computed. [2021-05-02 13:58:45,408 INFO L194 CegarLoopUtils]: At program point L33-2(lines 33 46) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse1 (<= main_~a~0 1)) (.cse2 (= (+ main_~y~0 5) main_~z~0))) (or (and .cse0 .cse1 (= main_~x~0 0) (= main_~z~0 6) .cse2 (= main_~n~0 0)) (and .cse1 (= main_~z~0 18) (= main_~z~0 (+ (* main_~n~0 6) 6)) (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ (* main_~x~0 2) 3))) (and .cse0 (= main_~n~0 1) .cse1 .cse2 (= main_~z~0 12) (= main_~x~0 1)))) [2021-05-02 13:58:45,408 INFO L194 CegarLoopUtils]: At program point L33-3(lines 33 46) the Hoare annotation is: (let ((.cse0 (= main_~z~0 (+ (* main_~n~0 6) 6)))) (or (and (<= main_~a~0 1) (= main_~z~0 18) .cse0 (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ (* main_~x~0 2) 3))) (and (< main_~a~0 1) (<= 0 main_~a~0) (= main_~n~0 1) .cse0 (= (+ main_~y~0 5) main_~z~0) (= main_~x~0 1)) (and (= main_~y~0 1) (= main_~x~0 0) .cse0 (= main_~z~0 6)))) [2021-05-02 13:58:45,408 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 22 56) no Hoare annotation was computed. [2021-05-02 13:58:45,408 INFO L194 CegarLoopUtils]: At program point L52(line 52) the Hoare annotation is: (or (and (= main_~y~0 1) (= main_~x~0 0) (= main_~z~0 6) (= main_~n~0 0)) (and (= main_~n~0 1) (= main_~z~0 12) (= main_~x~0 1)) (and (<= 0 main_~a~0) (<= main_~a~0 1) (= (+ main_~x~0 11) main_~y~0) (= main_~n~0 2) (= main_~z~0 (+ (* main_~n~0 6) 6)) (= main_~y~0 (+ (* main_~x~0 2) 3)))) [2021-05-02 13:58:45,408 INFO L194 CegarLoopUtils]: At program point L50(line 50) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse1 (= main_~z~0 (+ (* main_~n~0 6) 6)))) (or (and .cse0 (<= main_~a~0 1) (= main_~z~0 18) .cse1 (= main_~x~0 8) (= main_~y~0 (+ (* main_~x~0 2) 3))) (and (< main_~a~0 1) .cse0 (= main_~n~0 1) .cse1 (= (+ main_~y~0 5) main_~z~0) (= main_~x~0 1)) (and (= main_~y~0 1) (= main_~x~0 0) .cse1 (= main_~z~0 6)))) [2021-05-02 13:58:45,408 INFO L194 CegarLoopUtils]: At program point L48(line 48) the Hoare annotation is: (let ((.cse0 (= main_~z~0 (+ (* main_~n~0 6) 6)))) (or (and (<= main_~a~0 1) (= main_~z~0 18) .cse0 (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ (* main_~x~0 2) 3))) (and (< main_~a~0 1) (<= 0 main_~a~0) (= main_~n~0 1) .cse0 (= (+ main_~y~0 5) main_~z~0) (= main_~x~0 1)) (and (= main_~y~0 1) (= main_~x~0 0) .cse0 (= main_~z~0 6)))) [2021-05-02 13:58:45,408 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 22 56) no Hoare annotation was computed. [2021-05-02 13:58:45,408 INFO L198 CegarLoopUtils]: For program point L38(lines 33 46) no Hoare annotation was computed. [2021-05-02 13:58:45,408 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse1 (<= main_~a~0 1)) (.cse2 (= (+ main_~y~0 5) main_~z~0))) (or (and .cse0 .cse1 (= main_~x~0 0) (= main_~z~0 6) .cse2 (= main_~n~0 0)) (and .cse1 (= main_~z~0 18) (= main_~z~0 (+ (* main_~n~0 6) 6)) (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ (* main_~x~0 2) 3))) (and .cse0 (= main_~n~0 1) .cse1 .cse2 (= main_~z~0 12) (= main_~x~0 1)))) [2021-05-02 13:58:45,408 INFO L194 CegarLoopUtils]: At program point L34(line 34) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse1 (<= main_~a~0 1)) (.cse2 (= (+ main_~y~0 5) main_~z~0))) (or (and .cse0 .cse1 (= main_~x~0 0) (= main_~z~0 6) .cse2 (= main_~n~0 0)) (and .cse1 (= main_~z~0 18) (= main_~z~0 (+ (* main_~n~0 6) 6)) (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ (* main_~x~0 2) 3))) (and .cse0 (= main_~n~0 1) .cse1 .cse2 (= main_~z~0 12) (= main_~x~0 1)))) [2021-05-02 13:58:45,408 INFO L194 CegarLoopUtils]: At program point L34-1(line 34) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse1 (<= main_~a~0 1)) (.cse2 (= (+ main_~y~0 5) main_~z~0))) (or (and .cse0 .cse1 (= main_~x~0 0) (= main_~z~0 6) .cse2 (= main_~n~0 0)) (and .cse1 (= main_~z~0 18) (= main_~z~0 (+ (* main_~n~0 6) 6)) (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ (* main_~x~0 2) 3))) (and .cse0 (= main_~n~0 1) .cse1 .cse2 (= main_~z~0 12) (= main_~x~0 1)))) [2021-05-02 13:58:45,409 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 22 56) the Hoare annotation is: true [2021-05-02 13:58:45,409 INFO L194 CegarLoopUtils]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* main_~a~0 (- 1)))) (or (and (<= 0 main_~a~0) (<= (div main_~a~0 (- 65536)) (div (+ .cse0 32767) 65536)) (< main_~a~0 65536)) (and (< (div (+ main_~a~0 32768) (- 65536)) (+ (div (+ .cse0 (- 1)) 65536) 1)) (<= 0 (+ main_~a~0 65536)) (< main_~a~0 0)))) [2021-05-02 13:58:45,409 INFO L198 CegarLoopUtils]: For program point L26-1(line 26) no Hoare annotation was computed. [2021-05-02 13:58:45,409 INFO L198 CegarLoopUtils]: For program point L53(line 53) no Hoare annotation was computed. [2021-05-02 13:58:45,409 INFO L194 CegarLoopUtils]: At program point L51(line 51) the Hoare annotation is: (let ((.cse0 (= main_~z~0 (+ (* main_~n~0 6) 6)))) (or (and (= main_~n~0 1) (= 7 main_~y~0) .cse0 (= main_~x~0 1)) (and (<= 0 main_~a~0) (<= main_~a~0 1) (= main_~z~0 18) .cse0 (= main_~x~0 8) (= main_~y~0 (+ (* main_~x~0 2) 3))) (and (= main_~y~0 1) (= main_~x~0 0) .cse0 (= main_~z~0 6)))) [2021-05-02 13:58:45,409 INFO L194 CegarLoopUtils]: At program point L49(line 49) the Hoare annotation is: (let ((.cse0 (= main_~z~0 (+ (* main_~n~0 6) 6)))) (or (and (<= main_~a~0 1) (= main_~z~0 18) .cse0 (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ (* main_~x~0 2) 3))) (and (< main_~a~0 1) (<= 0 main_~a~0) (= main_~n~0 1) .cse0 (= (+ main_~y~0 5) main_~z~0) (= main_~x~0 1)) (and (= main_~y~0 1) (= main_~x~0 0) .cse0 (= main_~z~0 6)))) [2021-05-02 13:58:45,409 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse1 (<= main_~a~0 1)) (.cse2 (= (+ main_~y~0 5) main_~z~0))) (or (and .cse0 .cse1 (= main_~x~0 0) (= main_~z~0 6) .cse2 (= main_~n~0 0)) (and .cse1 (= main_~z~0 18) (= main_~z~0 (+ (* main_~n~0 6) 6)) (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ (* main_~x~0 2) 3))) (and .cse0 (= main_~n~0 1) .cse1 .cse2 (= main_~z~0 12) (= main_~x~0 1)))) [2021-05-02 13:58:45,409 INFO L194 CegarLoopUtils]: At program point L35(line 35) the Hoare annotation is: (let ((.cse0 (<= 0 main_~a~0)) (.cse1 (<= main_~a~0 1)) (.cse2 (= (+ main_~y~0 5) main_~z~0))) (or (and .cse0 .cse1 (= main_~x~0 0) (= main_~z~0 6) .cse2 (= main_~n~0 0)) (and .cse1 (= main_~z~0 18) (= main_~z~0 (+ (* main_~n~0 6) 6)) (= main_~x~0 8) (<= 1 main_~a~0) (= main_~y~0 (+ (* main_~x~0 2) 3))) (and .cse0 (= main_~n~0 1) .cse1 .cse2 (= main_~z~0 12) (= main_~x~0 1)))) [2021-05-02 13:58:45,409 INFO L198 CegarLoopUtils]: For program point L16(lines 16 17) no Hoare annotation was computed. [2021-05-02 13:58:45,409 INFO L198 CegarLoopUtils]: For program point L15(lines 15 18) no Hoare annotation was computed. [2021-05-02 13:58:45,409 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 14 20) the Hoare annotation is: true [2021-05-02 13:58:45,409 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 20) no Hoare annotation was computed. [2021-05-02 13:58:45,409 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 14 20) no Hoare annotation was computed. [2021-05-02 13:58:45,409 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 17) no Hoare annotation was computed. [2021-05-02 13:58:45,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 01:58:45 BoogieIcfgContainer [2021-05-02 13:58:45,419 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 13:58:45,419 INFO L168 Benchmark]: Toolchain (without parser) took 26191.57 ms. Allocated memory was 206.6 MB in the beginning and 305.1 MB in the end (delta: 98.6 MB). Free memory was 171.5 MB in the beginning and 259.8 MB in the end (delta: -88.3 MB). Peak memory consumption was 161.8 MB. Max. memory is 8.0 GB. [2021-05-02 13:58:45,419 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 206.6 MB. Free memory is still 187.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 13:58:45,419 INFO L168 Benchmark]: CACSL2BoogieTranslator took 133.41 ms. Allocated memory is still 206.6 MB. Free memory was 171.3 MB in the beginning and 161.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 13:58:45,419 INFO L168 Benchmark]: Boogie Preprocessor took 18.22 ms. Allocated memory is still 206.6 MB. Free memory was 161.1 MB in the beginning and 159.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:58:45,419 INFO L168 Benchmark]: RCFGBuilder took 310.77 ms. Allocated memory is still 206.6 MB. Free memory was 159.6 MB in the beginning and 174.2 MB in the end (delta: -14.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 13:58:45,419 INFO L168 Benchmark]: TraceAbstraction took 25725.84 ms. Allocated memory was 206.6 MB in the beginning and 305.1 MB in the end (delta: 98.6 MB). Free memory was 173.6 MB in the beginning and 259.8 MB in the end (delta: -86.2 MB). Peak memory consumption was 163.3 MB. Max. memory is 8.0 GB. [2021-05-02 13:58:45,419 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 206.6 MB. Free memory is still 187.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 133.41 ms. Allocated memory is still 206.6 MB. Free memory was 171.3 MB in the beginning and 161.2 MB in the end (delta: 10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.22 ms. Allocated memory is still 206.6 MB. Free memory was 161.1 MB in the beginning and 159.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 310.77 ms. Allocated memory is still 206.6 MB. Free memory was 159.6 MB in the beginning and 174.2 MB in the end (delta: -14.5 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 25725.84 ms. Allocated memory was 206.6 MB in the beginning and 305.1 MB in the end (delta: 98.6 MB). Free memory was 173.6 MB in the beginning and 259.8 MB in the end (delta: -86.2 MB). Peak memory consumption was 163.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 17]: 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, 39 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 16016.9ms, OverallIterations: 16, TraceHistogramMax: 18, EmptinessCheckTime: 26.6ms, AutomataDifference: 9202.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 9665.6ms, InitialAbstractionConstructionTime: 7.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 557 SDtfs, 242 SDslu, 2392 SDs, 0 SdLazy, 3365 SolverSat, 367 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 7948.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1044 GetRequests, 889 SyntacticMatches, 4 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 1068.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=14, InterpolantAutomatonStates: 138, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 154.2ms AutomataMinimizationTime, 16 MinimizatonAttempts, 5 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 19 LocationsWithAnnotation, 73 PreInvPairs, 109 NumberOfFragments, 894 HoareAnnotationTreeSize, 73 FomulaSimplifications, 2022 FormulaSimplificationTreeSizeReduction, 123.2ms HoareSimplificationTime, 19 FomulaSimplificationsInter, 2599 FormulaSimplificationTreeSizeReductionInter, 9522.0ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 110.4ms SsaConstructionTime, 385.0ms SatisfiabilityAnalysisTime, 2604.2ms InterpolantComputationTime, 1036 NumberOfCodeBlocks, 945 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 1020 ConstructedInterpolants, 0 QuantifiedInterpolants, 3780 SizeOfPredicates, 50 NumberOfNonLiveVariables, 2726 ConjunctsInSsa, 364 ConjunctsInUnsatCore, 16 InterpolantComputations, 3 PerfectInterpolantSequences, 3702/3947 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: 33]: Loop Invariant Derived loop invariant: ((((((0 <= a && a <= 1) && x == 0) && z == 6) && y + 5 == z) && n == 0) || (((((a <= 1 && z == 18) && z == n * 6 + 6) && x == 8) && 1 <= a) && y == x * 2 + 3)) || (((((0 <= a && n == 1) && a <= 1) && y + 5 == z) && z == 12) && x == 1) RESULT: Ultimate proved your program to be correct! Received shutdown request...