/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/mannadiv_unwindbound10.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 16:11:13,171 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 16:11:13,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 16:11:13,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 16:11:13,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 16:11:13,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 16:11:13,192 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 16:11:13,193 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 16:11:13,194 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 16:11:13,195 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 16:11:13,196 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 16:11:13,196 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 16:11:13,197 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 16:11:13,197 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 16:11:13,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 16:11:13,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 16:11:13,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 16:11:13,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 16:11:13,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 16:11:13,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 16:11:13,206 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 16:11:13,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 16:11:13,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 16:11:13,208 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 16:11:13,209 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 16:11:13,214 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 16:11:13,215 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 16:11:13,215 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 16:11:13,229 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 16:11:13,243 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 16:11:13,243 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 16:11:13,244 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 16:11:13,244 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 16:11:13,244 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 16:11:13,245 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 16:11:13,245 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 16:11:13,245 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 16:11:13,245 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 16:11:13,245 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 16:11:13,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 16:11:13,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 16:11:13,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 16:11:13,246 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 16:11:13,246 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 16:11:13,246 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 16:11:13,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 16:11:13,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 16:11:13,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 16:11:13,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 16:11:13,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 16:11:13,247 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 16:11:13,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 16:11:13,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 16:11:13,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 16:11:13,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 16:11:13,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 16:11:13,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 16:11:13,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 16:11:13,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 16:11:13,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 16:11:13,487 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 16:11:13,488 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 16:11:13,488 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 16:11:13,489 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound10.c [2021-05-02 16:11:13,524 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/586e0dc4d/f2da99eab25c4699915485245589e9da/FLAGd3e89c6cb [2021-05-02 16:11:13,860 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 16:11:13,860 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench-scaling/mannadiv_unwindbound10.c [2021-05-02 16:11:13,864 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/586e0dc4d/f2da99eab25c4699915485245589e9da/FLAGd3e89c6cb [2021-05-02 16:11:14,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/586e0dc4d/f2da99eab25c4699915485245589e9da [2021-05-02 16:11:14,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 16:11:14,318 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 16:11:14,319 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 16:11:14,320 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 16:11:14,322 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 16:11:14,323 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:11:14" (1/1) ... [2021-05-02 16:11:14,324 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a63ff09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:11:14, skipping insertion in model container [2021-05-02 16:11:14,324 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 04:11:14" (1/1) ... [2021-05-02 16:11:14,328 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 16:11:14,337 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 16:11:14,455 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/mannadiv_unwindbound10.c[573,586] [2021-05-02 16:11:14,462 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:11:14,467 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 16:11:14,516 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/mannadiv_unwindbound10.c[573,586] [2021-05-02 16:11:14,519 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 16:11:14,528 INFO L208 MainTranslator]: Completed translation [2021-05-02 16:11:14,529 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:11:14 WrapperNode [2021-05-02 16:11:14,529 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 16:11:14,529 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 16:11:14,529 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 16:11:14,530 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 16:11:14,550 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:11:14" (1/1) ... [2021-05-02 16:11:14,550 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:11:14" (1/1) ... [2021-05-02 16:11:14,569 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:11:14" (1/1) ... [2021-05-02 16:11:14,570 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:11:14" (1/1) ... [2021-05-02 16:11:14,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:11:14" (1/1) ... [2021-05-02 16:11:14,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:11:14" (1/1) ... [2021-05-02 16:11:14,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:11:14" (1/1) ... [2021-05-02 16:11:14,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 16:11:14,604 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 16:11:14,604 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 16:11:14,605 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 16:11:14,605 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:11:14" (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 16:11:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 16:11:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 16:11:14,686 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 16:11:14,687 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 16:11:14,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 16:11:14,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 16:11:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 16:11:14,687 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 16:11:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 16:11:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 16:11:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 16:11:14,688 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 16:11:14,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 16:11:14,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 16:11:14,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 16:11:14,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 16:11:14,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 16:11:14,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 16:11:14,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 16:11:14,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 16:11:14,915 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 16:11:14,915 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 16:11:14,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:11:14 BoogieIcfgContainer [2021-05-02 16:11:14,916 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 16:11:14,917 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 16:11:14,917 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 16:11:14,919 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 16:11:14,919 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 04:11:14" (1/3) ... [2021-05-02 16:11:14,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421c8d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:11:14, skipping insertion in model container [2021-05-02 16:11:14,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 04:11:14" (2/3) ... [2021-05-02 16:11:14,920 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@421c8d2d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 04:11:14, skipping insertion in model container [2021-05-02 16:11:14,920 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 04:11:14" (3/3) ... [2021-05-02 16:11:14,937 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound10.c [2021-05-02 16:11:14,941 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 16:11:14,943 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 16:11:14,968 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 16:11:14,990 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 16:11:14,991 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 16:11:14,991 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 16:11:14,991 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 16:11:14,991 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 16:11:14,991 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 16:11:14,991 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 16:11:14,991 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 16:11:15,005 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:11:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 16:11:15,009 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:15,009 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:15,010 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:15,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1859024204, now seen corresponding path program 1 times [2021-05-02 16:11:15,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:15,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572850937] [2021-05-02 16:11:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:15,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:11:15,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 16:11:15,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:11:15,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-05-02 16:11:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:11:15,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-05-02 16:11:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:11:15,245 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:11:15,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:15,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572850937] [2021-05-02 16:11:15,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572850937] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:11:15,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:11:15,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 16:11:15,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691837187] [2021-05-02 16:11:15,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 16:11:15,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:15,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 16:11:15,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:11:15,259 INFO L87 Difference]: Start difference. First operand has 30 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 19 states have internal predecessors, (25), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:11:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:15,352 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2021-05-02 16:11:15,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 16:11:15,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 22 [2021-05-02 16:11:15,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:15,360 INFO L225 Difference]: With dead ends: 54 [2021-05-02 16:11:15,360 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 16:11:15,364 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 16:11:15,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 16:11:15,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 16:11:15,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 16 states have internal predecessors, (19), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:11:15,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-05-02 16:11:15,391 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 22 [2021-05-02 16:11:15,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:15,391 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-05-02 16:11:15,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:11:15,400 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-05-02 16:11:15,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 16:11:15,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:15,401 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:15,402 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 16:11:15,402 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:15,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:15,402 INFO L82 PathProgramCache]: Analyzing trace with hash 243739414, now seen corresponding path program 1 times [2021-05-02 16:11:15,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:15,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723543011] [2021-05-02 16:11:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:15,416 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:15,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1634583166] [2021-05-02 16:11:15,417 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 16:11:15,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:11:15,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 16:11:15,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:11:15,498 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:15,502 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:15,503 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:15,536 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:15,539 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:15,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:11:15,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:15,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723543011] [2021-05-02 16:11:15,553 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:11:15,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634583166] [2021-05-02 16:11:15,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634583166] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 16:11:15,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 16:11:15,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 16:11:15,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494867462] [2021-05-02 16:11:15,554 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 16:11:15,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:15,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 16:11:15,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:11:15,555 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:11:15,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:15,564 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-05-02 16:11:15,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 16:11:15,565 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 16:11:15,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:15,565 INFO L225 Difference]: With dead ends: 34 [2021-05-02 16:11:15,565 INFO L226 Difference]: Without dead ends: 27 [2021-05-02 16:11:15,566 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 16:11:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-05-02 16:11:15,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-05-02 16:11:15,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 6 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:11:15,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-05-02 16:11:15,571 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 23 [2021-05-02 16:11:15,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:15,572 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-05-02 16:11:15,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:11:15,572 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-05-02 16:11:15,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-02 16:11:15,573 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:15,573 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:15,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 16:11:15,789 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:15,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:15,790 INFO L82 PathProgramCache]: Analyzing trace with hash 245526874, now seen corresponding path program 1 times [2021-05-02 16:11:15,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:15,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753241633] [2021-05-02 16:11:15,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:15,803 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:15,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336847746] [2021-05-02 16:11:15,804 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 16:11:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:11:15,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 16:11:15,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:11:15,881 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:15,883 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:15,915 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:15,917 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:11:15,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:15,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753241633] [2021-05-02 16:11:15,935 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:11:15,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336847746] [2021-05-02 16:11:15,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336847746] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:11:15,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:11:15,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:11:15,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913485225] [2021-05-02 16:11:15,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:11:15,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:15,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:11:15,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:11:15,937 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:11:16,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:16,039 INFO L93 Difference]: Finished difference Result 37 states and 43 transitions. [2021-05-02 16:11:16,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:11:16,039 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 23 [2021-05-02 16:11:16,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:16,041 INFO L225 Difference]: With dead ends: 37 [2021-05-02 16:11:16,041 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 16:11:16,042 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:11:16,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 16:11:16,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2021-05-02 16:11:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 20 states have (on average 1.2) internal successors, (24), 22 states have internal predecessors, (24), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:11:16,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-05-02 16:11:16,058 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 23 [2021-05-02 16:11:16,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:16,058 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-05-02 16:11:16,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-05-02 16:11:16,058 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-05-02 16:11:16,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 16:11:16,059 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:16,060 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:16,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:11:16,275 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:16,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:16,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1019533657, now seen corresponding path program 1 times [2021-05-02 16:11:16,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:16,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296891895] [2021-05-02 16:11:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:16,285 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:16,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1355999035] [2021-05-02 16:11:16,285 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 16:11:16,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:11:16,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:11:16,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:11:16,350 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,351 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,371 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,373 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,421 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,423 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 16:11:16,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:16,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296891895] [2021-05-02 16:11:16,444 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:11:16,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355999035] [2021-05-02 16:11:16,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355999035] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:11:16,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:11:16,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:11:16,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497654825] [2021-05-02 16:11:16,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:11:16,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:16,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:11:16,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:11:16,446 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:11:16,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:16,539 INFO L93 Difference]: Finished difference Result 39 states and 42 transitions. [2021-05-02 16:11:16,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 16:11:16,540 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 29 [2021-05-02 16:11:16,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:16,541 INFO L225 Difference]: With dead ends: 39 [2021-05-02 16:11:16,541 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 16:11:16,542 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:11:16,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 16:11:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2021-05-02 16:11:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 16:11:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2021-05-02 16:11:16,545 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2021-05-02 16:11:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:16,546 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2021-05-02 16:11:16,546 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 9 states have internal predecessors, (19), 4 states have call successors, (6), 2 states have call predecessors, (6), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-05-02 16:11:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2021-05-02 16:11:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 16:11:16,546 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:16,547 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:16,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:11:16,762 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:16,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:16,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1080225052, now seen corresponding path program 1 times [2021-05-02 16:11:16,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:16,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223799572] [2021-05-02 16:11:16,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:16,771 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:16,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [681145389] [2021-05-02 16:11:16,771 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 16:11:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:11:16,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 16:11:16,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:11:16,817 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,819 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,836 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,853 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:11:16,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:16,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223799572] [2021-05-02 16:11:16,863 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:11:16,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681145389] [2021-05-02 16:11:16,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681145389] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:11:16,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:11:16,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-05-02 16:11:16,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073734289] [2021-05-02 16:11:16,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 16:11:16,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:16,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 16:11:16,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 16:11:16,865 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 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 16:11:16,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:16,906 INFO L93 Difference]: Finished difference Result 43 states and 46 transitions. [2021-05-02 16:11:16,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 16:11:16,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 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 32 [2021-05-02 16:11:16,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:16,907 INFO L225 Difference]: With dead ends: 43 [2021-05-02 16:11:16,907 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 16:11:16,907 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 10.4ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:11:16,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 16:11:16,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-05-02 16:11:16,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 7 states have call successors, (7), 6 states have call predecessors, (7), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 16:11:16,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-05-02 16:11:16,912 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 32 [2021-05-02 16:11:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:16,912 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-05-02 16:11:16,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 4 states have call successors, (6), 4 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 16:11:16,912 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-05-02 16:11:16,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-05-02 16:11:16,913 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:16,913 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-05-02 16:11:17,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:11:17,128 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:17,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:17,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1448743382, now seen corresponding path program 2 times [2021-05-02 16:11:17,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:17,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419507028] [2021-05-02 16:11:17,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:17,136 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:17,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1068594086] [2021-05-02 16:11:17,136 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 16:11:17,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:11:17,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:11:17,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 16:11:17,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:11:17,200 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,201 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,202 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,218 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,220 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,234 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,236 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,251 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,252 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,260 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:11:17,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:17,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419507028] [2021-05-02 16:11:17,260 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:11:17,261 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068594086] [2021-05-02 16:11:17,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068594086] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:11:17,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:11:17,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2021-05-02 16:11:17,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611629233] [2021-05-02 16:11:17,261 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 16:11:17,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:17,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 16:11:17,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 16:11:17,262 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 16:11:17,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:17,308 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2021-05-02 16:11:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 16:11:17,308 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 41 [2021-05-02 16:11:17,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:17,309 INFO L225 Difference]: With dead ends: 52 [2021-05-02 16:11:17,309 INFO L226 Difference]: Without dead ends: 47 [2021-05-02 16:11:17,309 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:11:17,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-05-02 16:11:17,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-05-02 16:11:17,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 16:11:17,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2021-05-02 16:11:17,314 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 41 [2021-05-02 16:11:17,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:17,314 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2021-05-02 16:11:17,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 5 states have call successors, (7), 5 states have call predecessors, (7), 3 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 16:11:17,315 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2021-05-02 16:11:17,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 16:11:17,315 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:17,315 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:17,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-05-02 16:11:17,533 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:17,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:17,533 INFO L82 PathProgramCache]: Analyzing trace with hash -678977956, now seen corresponding path program 3 times [2021-05-02 16:11:17,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:17,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805028928] [2021-05-02 16:11:17,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:17,541 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:17,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1067319487] [2021-05-02 16:11:17,541 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 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 16:11:17,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-02 16:11:17,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:11:17,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 16:11:17,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:11:17,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,658 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,659 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,675 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,676 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,677 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,691 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,692 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,693 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,707 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,709 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 33 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:11:17,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:17,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805028928] [2021-05-02 16:11:17,735 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:11:17,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067319487] [2021-05-02 16:11:17,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067319487] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:11:17,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:11:17,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2021-05-02 16:11:17,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294329467] [2021-05-02 16:11:17,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 16:11:17,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:17,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 16:11:17,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 16:11:17,736 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 16:11:17,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:17,783 INFO L93 Difference]: Finished difference Result 61 states and 66 transitions. [2021-05-02 16:11:17,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 16:11:17,783 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 50 [2021-05-02 16:11:17,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:17,784 INFO L225 Difference]: With dead ends: 61 [2021-05-02 16:11:17,784 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 16:11:17,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 27.3ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:11:17,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 16:11:17,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 16:11:17,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 9 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-05-02 16:11:17,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 61 transitions. [2021-05-02 16:11:17,803 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 61 transitions. Word has length 50 [2021-05-02 16:11:17,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:17,804 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 61 transitions. [2021-05-02 16:11:17,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 6 states have call successors, (8), 6 states have call predecessors, (8), 4 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2021-05-02 16:11:17,806 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 61 transitions. [2021-05-02 16:11:17,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-05-02 16:11:17,811 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:17,811 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:18,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:11:18,028 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:18,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:18,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1632159894, now seen corresponding path program 4 times [2021-05-02 16:11:18,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:18,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053858140] [2021-05-02 16:11:18,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:18,051 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:18,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399846584] [2021-05-02 16:11:18,051 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 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 16:11:18,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:11:18,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:11:18,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-02 16:11:18,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:11:18,122 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,123 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,124 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,144 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,145 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,163 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,186 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,187 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,238 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:11:18,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:18,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053858140] [2021-05-02 16:11:18,238 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:11:18,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399846584] [2021-05-02 16:11:18,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399846584] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:11:18,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:11:18,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-05-02 16:11:18,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927413778] [2021-05-02 16:11:18,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 16:11:18,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:18,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 16:11:18,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 16:11:18,240 INFO L87 Difference]: Start difference. First operand 56 states and 61 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 16:11:18,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:18,296 INFO L93 Difference]: Finished difference Result 70 states and 76 transitions. [2021-05-02 16:11:18,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 16:11:18,296 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) Word has length 59 [2021-05-02 16:11:18,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:18,297 INFO L225 Difference]: With dead ends: 70 [2021-05-02 16:11:18,297 INFO L226 Difference]: Without dead ends: 65 [2021-05-02 16:11:18,297 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:11:18,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-05-02 16:11:18,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-05-02 16:11:18,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 47 states have internal predecessors, (53), 10 states have call successors, (10), 9 states have call predecessors, (10), 7 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-02 16:11:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 71 transitions. [2021-05-02 16:11:18,302 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 71 transitions. Word has length 59 [2021-05-02 16:11:18,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:18,303 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 71 transitions. [2021-05-02 16:11:18,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 7 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 6 states have call successors, (7) [2021-05-02 16:11:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 71 transitions. [2021-05-02 16:11:18,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 16:11:18,303 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:18,303 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:18,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:11:18,519 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:18,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:18,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1512407140, now seen corresponding path program 5 times [2021-05-02 16:11:18,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:18,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521496340] [2021-05-02 16:11:18,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:18,526 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:18,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1184209841] [2021-05-02 16:11:18,526 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 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 16:11:18,611 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-02 16:11:18,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:11:18,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 16:11:18,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:11:18,621 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,622 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,637 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,638 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,639 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,651 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,653 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,667 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,668 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,682 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,684 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,699 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,700 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,715 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,716 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:11:18,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:18,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521496340] [2021-05-02 16:11:18,726 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:11:18,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184209841] [2021-05-02 16:11:18,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184209841] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:11:18,726 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:11:18,726 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-05-02 16:11:18,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502163814] [2021-05-02 16:11:18,726 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 16:11:18,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:18,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 16:11:18,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 16:11:18,727 INFO L87 Difference]: Start difference. First operand 65 states and 71 transitions. Second operand has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-02 16:11:18,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:18,810 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-05-02 16:11:18,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 16:11:18,811 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) Word has length 68 [2021-05-02 16:11:18,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:18,811 INFO L225 Difference]: With dead ends: 79 [2021-05-02 16:11:18,811 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 16:11:18,812 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-02 16:11:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 16:11:18,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-05-02 16:11:18,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.1296296296296295) internal successors, (61), 54 states have internal predecessors, (61), 11 states have call successors, (11), 10 states have call predecessors, (11), 8 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2021-05-02 16:11:18,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2021-05-02 16:11:18,817 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 68 [2021-05-02 16:11:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:18,817 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2021-05-02 16:11:18,817 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.222222222222222) internal successors, (47), 8 states have internal predecessors, (47), 8 states have call successors, (10), 8 states have call predecessors, (10), 6 states have return successors, (8), 6 states have call predecessors, (8), 7 states have call successors, (8) [2021-05-02 16:11:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2021-05-02 16:11:18,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-05-02 16:11:18,818 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:18,818 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:19,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-05-02 16:11:19,034 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:19,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:19,034 INFO L82 PathProgramCache]: Analyzing trace with hash 771706710, now seen corresponding path program 6 times [2021-05-02 16:11:19,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:19,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832142958] [2021-05-02 16:11:19,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:19,040 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:19,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1476012272] [2021-05-02 16:11:19,040 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 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 16:11:19,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-02 16:11:19,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:11:19,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 16:11:19,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:11:19,103 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,104 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,105 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,120 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,149 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,164 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,178 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,179 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,180 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,194 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,196 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,211 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,212 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 12 proven. 147 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:11:19,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:19,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832142958] [2021-05-02 16:11:19,222 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:11:19,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476012272] [2021-05-02 16:11:19,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476012272] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:11:19,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:11:19,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2021-05-02 16:11:19,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005937298] [2021-05-02 16:11:19,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 16:11:19,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:19,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 16:11:19,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 16:11:19,223 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 16:11:19,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:19,296 INFO L93 Difference]: Finished difference Result 88 states and 96 transitions. [2021-05-02 16:11:19,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 16:11:19,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) Word has length 77 [2021-05-02 16:11:19,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:19,297 INFO L225 Difference]: With dead ends: 88 [2021-05-02 16:11:19,297 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 16:11:19,298 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-02 16:11:19,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 16:11:19,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-05-02 16:11:19,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 12 states have call successors, (12), 11 states have call predecessors, (12), 9 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-02 16:11:19,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 91 transitions. [2021-05-02 16:11:19,303 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 91 transitions. Word has length 77 [2021-05-02 16:11:19,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:19,303 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 91 transitions. [2021-05-02 16:11:19,303 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 9 states have call successors, (11), 9 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 8 states have call successors, (9) [2021-05-02 16:11:19,303 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 91 transitions. [2021-05-02 16:11:19,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 16:11:19,304 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:19,304 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:19,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:11:19,520 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:19,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:19,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1848611036, now seen corresponding path program 7 times [2021-05-02 16:11:19,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:19,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189569256] [2021-05-02 16:11:19,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:19,526 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:19,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2064991465] [2021-05-02 16:11:19,526 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 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 16:11:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 16:11:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 16:11:19,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:11:19,586 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,587 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,588 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,602 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,603 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,615 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,616 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,617 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,629 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,631 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,664 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,665 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,679 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,680 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,681 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,695 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,713 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,729 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,730 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 14 proven. 203 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:11:19,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:19,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189569256] [2021-05-02 16:11:19,740 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:11:19,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064991465] [2021-05-02 16:11:19,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064991465] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:11:19,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:11:19,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2021-05-02 16:11:19,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8511743] [2021-05-02 16:11:19,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 16:11:19,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:19,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 16:11:19,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 16:11:19,741 INFO L87 Difference]: Start difference. First operand 83 states and 91 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-02 16:11:19,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:19,827 INFO L93 Difference]: Finished difference Result 97 states and 106 transitions. [2021-05-02 16:11:19,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 16:11:19,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) Word has length 86 [2021-05-02 16:11:19,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:19,828 INFO L225 Difference]: With dead ends: 97 [2021-05-02 16:11:19,828 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 16:11:19,829 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-02 16:11:19,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 16:11:19,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-05-02 16:11:19,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 68 states have (on average 1.1323529411764706) internal successors, (77), 68 states have internal predecessors, (77), 13 states have call successors, (13), 12 states have call predecessors, (13), 10 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 16:11:19,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-05-02 16:11:19,834 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 86 [2021-05-02 16:11:19,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:19,834 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-05-02 16:11:19,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 states have internal predecessors, (61), 10 states have call successors, (12), 10 states have call predecessors, (12), 8 states have return successors, (10), 8 states have call predecessors, (10), 9 states have call successors, (10) [2021-05-02 16:11:19,834 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-05-02 16:11:19,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-05-02 16:11:19,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:19,835 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:20,051 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 16:11:20,051 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:20,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:20,051 INFO L82 PathProgramCache]: Analyzing trace with hash -399923690, now seen corresponding path program 8 times [2021-05-02 16:11:20,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:20,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972076661] [2021-05-02 16:11:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:20,057 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:20,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [363114439] [2021-05-02 16:11:20,057 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 16:11:20,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 16:11:20,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:11:20,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-02 16:11:20,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:11:20,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,119 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,134 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,146 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,147 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,148 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,160 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,162 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,175 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,176 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,177 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,191 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,192 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,193 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,207 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,208 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,209 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,224 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,225 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,226 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,243 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,259 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,260 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 16 proven. 268 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:11:20,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:20,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972076661] [2021-05-02 16:11:20,286 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:11:20,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363114439] [2021-05-02 16:11:20,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363114439] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:11:20,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:11:20,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-05-02 16:11:20,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840833238] [2021-05-02 16:11:20,287 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 16:11:20,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:20,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 16:11:20,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 16:11:20,287 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-02 16:11:20,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:20,385 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2021-05-02 16:11:20,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 16:11:20,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) Word has length 95 [2021-05-02 16:11:20,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:20,386 INFO L225 Difference]: With dead ends: 106 [2021-05-02 16:11:20,386 INFO L226 Difference]: Without dead ends: 101 [2021-05-02 16:11:20,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-02 16:11:20,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-05-02 16:11:20,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-05-02 16:11:20,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 75 states have (on average 1.1333333333333333) internal successors, (85), 75 states have internal predecessors, (85), 14 states have call successors, (14), 13 states have call predecessors, (14), 11 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 16:11:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2021-05-02 16:11:20,391 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 95 [2021-05-02 16:11:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:20,392 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2021-05-02 16:11:20,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.666666666666667) internal successors, (68), 11 states have internal predecessors, (68), 11 states have call successors, (13), 11 states have call predecessors, (13), 9 states have return successors, (11), 9 states have call predecessors, (11), 10 states have call successors, (11) [2021-05-02 16:11:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2021-05-02 16:11:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 16:11:20,392 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:20,392 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:20,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-05-02 16:11:20,608 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:20,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:20,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1717228060, now seen corresponding path program 9 times [2021-05-02 16:11:20,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:20,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758894513] [2021-05-02 16:11:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:20,614 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:20,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1335748979] [2021-05-02 16:11:20,614 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 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 16:11:20,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-05-02 16:11:20,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 16:11:20,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 16:11:20,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 16:11:20,696 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,697 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,711 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,712 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,724 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,725 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,738 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,739 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,752 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,753 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,766 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,767 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,768 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,782 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,798 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,799 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,814 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,816 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,833 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,849 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,850 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 16:11:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 364 backedges. 18 proven. 342 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 16:11:20,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 16:11:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758894513] [2021-05-02 16:11:20,860 WARN L340 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-05-02 16:11:20,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335748979] [2021-05-02 16:11:20,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335748979] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 16:11:20,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-05-02 16:11:20,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-05-02 16:11:20,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536844920] [2021-05-02 16:11:20,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 16:11:20,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 16:11:20,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 16:11:20,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 16:11:20,861 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-02 16:11:20,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 16:11:20,990 INFO L93 Difference]: Finished difference Result 115 states and 126 transitions. [2021-05-02 16:11:20,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 16:11:20,991 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) Word has length 104 [2021-05-02 16:11:20,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 16:11:20,992 INFO L225 Difference]: With dead ends: 115 [2021-05-02 16:11:20,992 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 16:11:20,992 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 118.0ms TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2021-05-02 16:11:20,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 16:11:20,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2021-05-02 16:11:20,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 82 states have (on average 1.1341463414634145) internal successors, (93), 82 states have internal predecessors, (93), 15 states have call successors, (15), 14 states have call predecessors, (15), 12 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2021-05-02 16:11:20,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2021-05-02 16:11:20,998 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 104 [2021-05-02 16:11:20,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 16:11:20,998 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2021-05-02 16:11:20,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.769230769230769) internal successors, (75), 12 states have internal predecessors, (75), 12 states have call successors, (14), 12 states have call predecessors, (14), 10 states have return successors, (12), 10 states have call predecessors, (12), 11 states have call successors, (12) [2021-05-02 16:11:20,998 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2021-05-02 16:11:20,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-05-02 16:11:20,999 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 16:11:20,999 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 16:11:21,214 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 16:11:21,215 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 16:11:21,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 16:11:21,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1468805930, now seen corresponding path program 10 times [2021-05-02 16:11:21,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 16:11:21,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350317757] [2021-05-02 16:11:21,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 16:11:21,221 ERROR L278 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-05-02 16:11:21,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1933030139] [2021-05-02 16:11:21,221 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 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 16:11:21,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 16:11:21,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-05-02 16:11:21,280 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:11:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-05-02 16:11:21,306 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-05-02 16:11:21,394 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-05-02 16:11:21,394 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-02 16:11:21,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 16:11:21,651 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 04:11:21 BoogieIcfgContainer [2021-05-02 16:11:21,651 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 16:11:21,652 INFO L168 Benchmark]: Toolchain (without parser) took 7334.19 ms. Allocated memory was 180.4 MB in the beginning and 261.1 MB in the end (delta: 80.7 MB). Free memory was 143.8 MB in the beginning and 185.0 MB in the end (delta: -41.2 MB). Peak memory consumption was 40.3 MB. Max. memory is 8.0 GB. [2021-05-02 16:11:21,652 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 180.4 MB. Free memory was 160.3 MB in the beginning and 160.2 MB in the end (delta: 125.3 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 16:11:21,652 INFO L168 Benchmark]: CACSL2BoogieTranslator took 209.40 ms. Allocated memory is still 180.4 MB. Free memory was 143.7 MB in the beginning and 162.9 MB in the end (delta: -19.2 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. [2021-05-02 16:11:21,652 INFO L168 Benchmark]: Boogie Preprocessor took 60.38 ms. Allocated memory is still 180.4 MB. Free memory was 162.9 MB in the beginning and 161.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 16:11:21,652 INFO L168 Benchmark]: RCFGBuilder took 312.21 ms. Allocated memory is still 180.4 MB. Free memory was 161.2 MB in the beginning and 145.6 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. [2021-05-02 16:11:21,652 INFO L168 Benchmark]: TraceAbstraction took 6734.13 ms. Allocated memory was 180.4 MB in the beginning and 261.1 MB in the end (delta: 80.7 MB). Free memory was 145.1 MB in the beginning and 185.0 MB in the end (delta: -39.9 MB). Peak memory consumption was 42.4 MB. Max. memory is 8.0 GB. [2021-05-02 16:11:21,652 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 180.4 MB. Free memory was 160.3 MB in the beginning and 160.2 MB in the end (delta: 125.3 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 209.40 ms. Allocated memory is still 180.4 MB. Free memory was 143.7 MB in the beginning and 162.9 MB in the end (delta: -19.2 MB). Peak memory consumption was 11.6 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 60.38 ms. Allocated memory is still 180.4 MB. Free memory was 162.9 MB in the beginning and 161.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 312.21 ms. Allocated memory is still 180.4 MB. Free memory was 161.2 MB in the beginning and 145.6 MB in the end (delta: 15.6 MB). Peak memory consumption was 15.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6734.13 ms. Allocated memory was 180.4 MB in the beginning and 261.1 MB in the end (delta: 80.7 MB). Free memory was 145.1 MB in the beginning and 185.0 MB in the end (delta: -39.9 MB). Peak memory consumption was 42.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L22] int counter = 0; VAL [\old(counter)=20, counter=0] [L24] int x1, x2; [L25] int y1, y2, y3; [L26] x1 = __VERIFIER_nondet_int() [L27] x2 = __VERIFIER_nondet_int() [L29] CALL assume_abort_if_not(x1 >= 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L29] RET assume_abort_if_not(x1 >= 0) VAL [\old(counter)=0, counter=0, x1=11, x2=1] [L30] CALL assume_abort_if_not(x2 != 0) VAL [\old(cond)=1, \old(counter)=0, counter=0] [L13] COND FALSE !(!cond) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=0] [L30] RET assume_abort_if_not(x2 != 0) VAL [\old(counter)=0, counter=0, x1=11, x2=1] [L32] y1 = 0 [L33] y2 = 0 [L34] y3 = x1 VAL [\old(counter)=0, counter=0, x1=11, x2=1, y1=0, y2=0, y3=11] [L36] EXPR counter++ VAL [\old(counter)=0, counter=1, counter++=0, x1=11, x2=1, y1=0, y2=0, y3=11] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=1] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=1] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=1, x1=11, x2=1, y1=0, y2=0, y3=11] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=1, x1=11, x2=1, y1=0, y2=0, y3=11] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=1, x1=11, x2=1, y1=1, y2=0, y3=10] [L36] EXPR counter++ VAL [\old(counter)=0, counter=2, counter++=1, x1=11, x2=1, y1=1, y2=0, y3=10] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=2] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=2] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=2, x1=11, x2=1, y1=1, y2=0, y3=10] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=2, x1=11, x2=1, y1=1, y2=0, y3=10] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=2, x1=11, x2=1, y1=2, y2=0, y3=9] [L36] EXPR counter++ VAL [\old(counter)=0, counter=3, counter++=2, x1=11, x2=1, y1=2, y2=0, y3=9] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=3] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=3] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=3, x1=11, x2=1, y1=2, y2=0, y3=9] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=3, x1=11, x2=1, y1=2, y2=0, y3=9] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=3, x1=11, x2=1, y1=3, y2=0, y3=8] [L36] EXPR counter++ VAL [\old(counter)=0, counter=4, counter++=3, x1=11, x2=1, y1=3, y2=0, y3=8] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=4] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=4] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=4, x1=11, x2=1, y1=3, y2=0, y3=8] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=4, x1=11, x2=1, y1=3, y2=0, y3=8] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=4, x1=11, x2=1, y1=4, y2=0, y3=7] [L36] EXPR counter++ VAL [\old(counter)=0, counter=5, counter++=4, x1=11, x2=1, y1=4, y2=0, y3=7] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=5] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=5] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=5, x1=11, x2=1, y1=4, y2=0, y3=7] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=5, x1=11, x2=1, y1=4, y2=0, y3=7] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=5, x1=11, x2=1, y1=5, y2=0, y3=6] [L36] EXPR counter++ VAL [\old(counter)=0, counter=6, counter++=5, x1=11, x2=1, y1=5, y2=0, y3=6] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=6] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=6] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=6, x1=11, x2=1, y1=5, y2=0, y3=6] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=6, x1=11, x2=1, y1=5, y2=0, y3=6] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=6, x1=11, x2=1, y1=6, y2=0, y3=5] [L36] EXPR counter++ VAL [\old(counter)=0, counter=7, counter++=6, x1=11, x2=1, y1=6, y2=0, y3=5] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=7] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=7] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=7, x1=11, x2=1, y1=6, y2=0, y3=5] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=7, x1=11, x2=1, y1=6, y2=0, y3=5] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=7, x1=11, x2=1, y1=7, y2=0, y3=4] [L36] EXPR counter++ VAL [\old(counter)=0, counter=8, counter++=7, x1=11, x2=1, y1=7, y2=0, y3=4] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=8] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=8] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=8, x1=11, x2=1, y1=7, y2=0, y3=4] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=8, x1=11, x2=1, y1=7, y2=0, y3=4] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=8, x1=11, x2=1, y1=8, y2=0, y3=3] [L36] EXPR counter++ VAL [\old(counter)=0, counter=9, counter++=8, x1=11, x2=1, y1=8, y2=0, y3=3] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=9] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=9] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=9, x1=11, x2=1, y1=8, y2=0, y3=3] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=9, x1=11, x2=1, y1=8, y2=0, y3=3] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=9, x1=11, x2=1, y1=9, y2=0, y3=2] [L36] EXPR counter++ VAL [\old(counter)=0, counter=10, counter++=9, x1=11, x2=1, y1=9, y2=0, y3=2] [L36] COND TRUE counter++<10 [L37] CALL __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(cond)=1, \old(counter)=0, counter=10] [L16] COND FALSE !(!(cond)) VAL [\old(cond)=1, \old(counter)=0, cond=1, counter=10] [L37] RET __VERIFIER_assert(y1*x2 + y2 + y3 == x1) VAL [\old(counter)=0, counter=10, x1=11, x2=1, y1=9, y2=0, y3=2] [L39] COND FALSE !(!(y3 != 0)) VAL [\old(counter)=0, counter=10, x1=11, x2=1, y1=9, y2=0, y3=2] [L41] COND TRUE y2 + 1 == x2 [L42] y1 = y1 + 1 [L43] y2 = 0 [L44] y3 = y3 - 1 VAL [\old(counter)=0, counter=10, x1=11, x2=1, y1=10, y2=0, y3=1] [L36] EXPR counter++ VAL [\old(counter)=0, counter=11, counter++=10, x1=11, x2=1, y1=10, y2=0, y3=1] [L36] COND FALSE !(counter++<10) [L50] CALL __VERIFIER_assert(y1*x2 + y2 == x1) VAL [\old(cond)=0, \old(counter)=0, counter=11] [L16] COND TRUE !(cond) VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] [L18] reach_error() VAL [\old(cond)=0, \old(counter)=0, cond=0, counter=11] - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6621.8ms, OverallIterations: 14, TraceHistogramMax: 11, EmptinessCheckTime: 17.8ms, AutomataDifference: 1003.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 372 SDtfs, 271 SDslu, 997 SDs, 0 SdLazy, 479 SolverSat, 169 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 381.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 736 GetRequests, 603 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 713.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=110occurred in iteration=13, InterpolantAutomatonStates: 152, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 100.9ms AutomataMinimizationTime, 13 MinimizatonAttempts, 9 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 126.0ms SsaConstructionTime, 353.9ms SatisfiabilityAnalysisTime, 1540.0ms InterpolantComputationTime, 822 NumberOfCodeBlocks, 822 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 696 ConstructedInterpolants, 0 QuantifiedInterpolants, 1997 SizeOfPredicates, 61 NumberOfNonLiveVariables, 2570 ConjunctsInSsa, 176 ConjunctsInUnsatCore, 13 InterpolantComputations, 2 PerfectInterpolantSequences, 137/1314 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...