/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/loop-acceleration/nested_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:11:40,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:11:40,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:11:40,588 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:11:40,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:11:40,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:11:40,596 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:11:40,596 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:11:40,597 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:11:40,597 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:11:40,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:11:40,599 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:11:40,600 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:11:40,601 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:11:40,602 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:11:40,602 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:11:40,604 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:11:40,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:11:40,614 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:11:40,616 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:11:40,619 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 12:11:40,649 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:11:40,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:11:40,651 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:11:40,651 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:11:40,651 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:11:40,651 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:11:40,652 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:11:40,652 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:11:40,652 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:11:40,652 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:11:40,653 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:11:40,653 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:11:40,653 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:11:40,653 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:11:40,653 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:11:40,653 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:11:40,653 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:11:40,653 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:11:40,654 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:11:40,654 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:11:40,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:11:40,654 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:11:40,654 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:11:40,654 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:11:40,654 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:11:40,654 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:11:40,654 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:11:40,655 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:11:40,655 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:11:40,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:11:40,953 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:11:40,955 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:11:40,955 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:11:40,956 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:11:40,956 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2021-05-02 12:11:41,025 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c86d13e3/3c248d2738354201862db7147f41efa6/FLAGc73e8452a [2021-05-02 12:11:41,348 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:11:41,348 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c [2021-05-02 12:11:41,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c86d13e3/3c248d2738354201862db7147f41efa6/FLAGc73e8452a [2021-05-02 12:11:41,808 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6c86d13e3/3c248d2738354201862db7147f41efa6 [2021-05-02 12:11:41,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:11:41,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:11:41,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:11:41,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:11:41,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:11:41,828 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:11:41" (1/1) ... [2021-05-02 12:11:41,829 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@224de93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:11:41, skipping insertion in model container [2021-05-02 12:11:41,830 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:11:41" (1/1) ... [2021-05-02 12:11:41,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:11:41,845 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:11:41,965 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c[322,335] [2021-05-02 12:11:41,972 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:11:41,978 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:11:41,987 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/nested_1-1.c[322,335] [2021-05-02 12:11:41,990 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:11:42,000 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:11:42,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:11:42 WrapperNode [2021-05-02 12:11:42,001 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:11:42,002 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:11:42,002 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:11:42,002 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:11:42,011 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:11:42" (1/1) ... [2021-05-02 12:11:42,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:11:42" (1/1) ... [2021-05-02 12:11:42,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:11:42" (1/1) ... [2021-05-02 12:11:42,016 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:11:42" (1/1) ... [2021-05-02 12:11:42,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:11:42" (1/1) ... [2021-05-02 12:11:42,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:11:42" (1/1) ... [2021-05-02 12:11:42,041 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:11:42" (1/1) ... [2021-05-02 12:11:42,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:11:42,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:11:42,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:11:42,074 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:11:42,075 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:11:42" (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 12:11:42,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:11:42,130 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:11:42,130 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:11:42,130 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:11:42,130 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:11:42,130 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:11:42,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:11:42,130 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:11:42,131 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:11:42,131 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:11:42,131 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:11:42,131 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:11:42,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:11:42,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:11:42,132 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:11:42,132 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:11:42,132 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:11:42,324 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:11:42,324 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-02 12:11:42,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:11:42 BoogieIcfgContainer [2021-05-02 12:11:42,325 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:11:42,326 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:11:42,326 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:11:42,328 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:11:42,328 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:11:41" (1/3) ... [2021-05-02 12:11:42,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6157da1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:11:42, skipping insertion in model container [2021-05-02 12:11:42,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:11:42" (2/3) ... [2021-05-02 12:11:42,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6157da1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:11:42, skipping insertion in model container [2021-05-02 12:11:42,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:11:42" (3/3) ... [2021-05-02 12:11:42,330 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1-1.c [2021-05-02 12:11:42,333 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:11:42,335 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:11:42,362 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:11:42,385 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:11:42,385 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:11:42,385 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:11:42,385 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:11:42,385 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:11:42,385 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:11:42,385 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:11:42,385 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:11:42,424 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:11:42,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 12:11:42,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:42,427 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:42,428 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:42,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:42,431 INFO L82 PathProgramCache]: Analyzing trace with hash 2021311625, now seen corresponding path program 1 times [2021-05-02 12:11:42,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:42,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378874554] [2021-05-02 12:11:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:42,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:42,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:42,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:11:42,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:42,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378874554] [2021-05-02 12:11:42,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378874554] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:11:42,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:11:42,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 12:11:42,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786863353] [2021-05-02 12:11:42,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 12:11:42,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:42,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 12:11:42,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:11:42,713 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.5) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:42,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:42,814 INFO L93 Difference]: Finished difference Result 37 states and 50 transitions. [2021-05-02 12:11:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 12:11:42,816 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 12:11:42,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:42,820 INFO L225 Difference]: With dead ends: 37 [2021-05-02 12:11:42,820 INFO L226 Difference]: Without dead ends: 17 [2021-05-02 12:11:42,824 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 12:11:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-05-02 12:11:42,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2021-05-02 12:11:42,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 10 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:42,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-05-02 12:11:42,852 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 11 [2021-05-02 12:11:42,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:42,852 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-05-02 12:11:42,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:42,853 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-05-02 12:11:42,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 12:11:42,853 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:42,854 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:42,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:11:42,854 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:42,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:42,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2037585725, now seen corresponding path program 1 times [2021-05-02 12:11:42,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:42,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838526982] [2021-05-02 12:11:42,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:42,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:42,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:42,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:11:42,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:42,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838526982] [2021-05-02 12:11:42,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838526982] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:11:42,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:11:42,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 12:11:42,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499722581] [2021-05-02 12:11:42,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 12:11:42,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:42,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 12:11:42,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:11:42,957 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:43,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:43,022 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2021-05-02 12:11:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 12:11:43,023 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 12:11:43,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:43,024 INFO L225 Difference]: With dead ends: 24 [2021-05-02 12:11:43,024 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 12:11:43,025 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 48.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 12:11:43,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 12:11:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 12:11:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:43,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-05-02 12:11:43,045 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 14 [2021-05-02 12:11:43,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:43,045 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-05-02 12:11:43,045 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:43,046 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-05-02 12:11:43,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 12:11:43,047 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:43,047 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:43,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 12:11:43,047 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:43,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:43,049 INFO L82 PathProgramCache]: Analyzing trace with hash -183414982, now seen corresponding path program 1 times [2021-05-02 12:11:43,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:43,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290757459] [2021-05-02 12:11:43,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:43,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:43,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:11:43,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:43,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290757459] [2021-05-02 12:11:43,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290757459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:43,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874625776] [2021-05-02 12:11:43,150 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 12:11:43,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:43,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 9 conjunts are in the unsatisfiable core [2021-05-02 12:11:43,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:43,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:11:43,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874625776] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:43,277 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:43,277 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-02 12:11:43,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424031603] [2021-05-02 12:11:43,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 12:11:43,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:43,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 12:11:43,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:11:43,278 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:43,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:43,619 INFO L93 Difference]: Finished difference Result 35 states and 43 transitions. [2021-05-02 12:11:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 12:11:43,619 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 12:11:43,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:43,620 INFO L225 Difference]: With dead ends: 35 [2021-05-02 12:11:43,620 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 12:11:43,620 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:11:43,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 12:11:43,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 22. [2021-05-02 12:11:43,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:43,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-05-02 12:11:43,626 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 15 [2021-05-02 12:11:43,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:43,626 INFO L480 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-05-02 12:11:43,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:43,626 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-05-02 12:11:43,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 12:11:43,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:43,627 INFO L523 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:43,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 12:11:43,845 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:43,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:43,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1053252407, now seen corresponding path program 2 times [2021-05-02 12:11:43,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:43,846 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640228046] [2021-05-02 12:11:43,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:43,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:43,921 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-05-02 12:11:43,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:43,921 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640228046] [2021-05-02 12:11:43,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640228046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:43,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760164943] [2021-05-02 12:11:43,922 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 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 12:11:43,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:11:43,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:11:43,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 12:11:43,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:44,040 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 12:11:44,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760164943] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:44,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:44,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-05-02 12:11:44,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488748798] [2021-05-02 12:11:44,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 12:11:44,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:44,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 12:11:44,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-05-02 12:11:44,042 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:44,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:44,504 INFO L93 Difference]: Finished difference Result 47 states and 57 transitions. [2021-05-02 12:11:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 12:11:44,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-05-02 12:11:44,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:44,506 INFO L225 Difference]: With dead ends: 47 [2021-05-02 12:11:44,506 INFO L226 Difference]: Without dead ends: 35 [2021-05-02 12:11:44,507 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 402.8ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:11:44,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-05-02 12:11:44,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 30. [2021-05-02 12:11:44,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-05-02 12:11:44,519 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 21 [2021-05-02 12:11:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:44,519 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-05-02 12:11:44,519 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-05-02 12:11:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-05-02 12:11:44,520 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:44,521 INFO L523 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:44,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:11:44,737 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:44,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1297906108, now seen corresponding path program 3 times [2021-05-02 12:11:44,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:44,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721263459] [2021-05-02 12:11:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:44,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:44,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:44,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:44,818 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-05-02 12:11:44,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:44,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721263459] [2021-05-02 12:11:44,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [721263459] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:44,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477742178] [2021-05-02 12:11:44,818 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 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 12:11:44,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-02 12:11:44,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:11:44,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 12:11:44,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:44,970 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:44,989 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 37 proven. 6 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-05-02 12:11:44,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477742178] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:44,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:44,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-05-02 12:11:44,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325330030] [2021-05-02 12:11:44,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 12:11:44,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:44,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 12:11:44,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:11:44,993 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:45,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:45,116 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2021-05-02 12:11:45,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:11:45,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2021-05-02 12:11:45,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:45,118 INFO L225 Difference]: With dead ends: 52 [2021-05-02 12:11:45,118 INFO L226 Difference]: Without dead ends: 33 [2021-05-02 12:11:45,118 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 120.5ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:11:45,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-05-02 12:11:45,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-05-02 12:11:45,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:45,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 12:11:45,125 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 29 [2021-05-02 12:11:45,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:45,125 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 12:11:45,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 12:11:45,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 12:11:45,126 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:45,126 INFO L523 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:45,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:11:45,341 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:45,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:45,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1377436611, now seen corresponding path program 4 times [2021-05-02 12:11:45,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:45,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140516031] [2021-05-02 12:11:45,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:45,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:45,446 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 53 proven. 10 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-05-02 12:11:45,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:45,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140516031] [2021-05-02 12:11:45,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140516031] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:45,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390390217] [2021-05-02 12:11:45,447 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 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 12:11:45,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:11:45,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:11:45,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-02 12:11:45,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-05-02 12:11:45,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390390217] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:45,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:45,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-05-02 12:11:45,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141548864] [2021-05-02 12:11:45,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 12:11:45,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:45,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 12:11:45,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:11:45,595 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:46,590 INFO L93 Difference]: Finished difference Result 72 states and 85 transitions. [2021-05-02 12:11:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 12:11:46,590 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-02 12:11:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:46,591 INFO L225 Difference]: With dead ends: 72 [2021-05-02 12:11:46,591 INFO L226 Difference]: Without dead ends: 51 [2021-05-02 12:11:46,593 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 858.1ms TimeCoverageRelationStatistics Valid=261, Invalid=1545, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 12:11:46,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-05-02 12:11:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-05-02 12:11:46,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-05-02 12:11:46,610 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 32 [2021-05-02 12:11:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:46,610 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-05-02 12:11:46,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 12 states have internal predecessors, (34), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:46,610 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-05-02 12:11:46,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-05-02 12:11:46,612 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:46,613 INFO L523 BasicCegarLoop]: trace histogram [20, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:46,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:11:46,830 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:46,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:46,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1395208781, now seen corresponding path program 5 times [2021-05-02 12:11:46,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:46,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453148019] [2021-05-02 12:11:46,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:46,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:46,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 112 proven. 15 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-05-02 12:11:46,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:46,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453148019] [2021-05-02 12:11:46,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453148019] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:46,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888041802] [2021-05-02 12:11:46,974 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 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 12:11:47,061 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-02 12:11:47,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:11:47,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 12:11:47,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:47,133 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:47,159 INFO L134 CoverageAnalysis]: Checked inductivity of 292 backedges. 189 proven. 15 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-05-02 12:11:47,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888041802] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:47,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:47,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-05-02 12:11:47,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712841268] [2021-05-02 12:11:47,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 12:11:47,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:47,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 12:11:47,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:11:47,160 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:47,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:47,342 INFO L93 Difference]: Finished difference Result 79 states and 90 transitions. [2021-05-02 12:11:47,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:11:47,343 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-05-02 12:11:47,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:47,344 INFO L225 Difference]: With dead ends: 79 [2021-05-02 12:11:47,344 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 12:11:47,344 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 195.3ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:11:47,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 12:11:47,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-05-02 12:11:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-05-02 12:11:47,361 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 43 [2021-05-02 12:11:47,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:47,361 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-05-02 12:11:47,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-05-02 12:11:47,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-05-02 12:11:47,361 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:47,362 INFO L523 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:47,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-05-02 12:11:47,562 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:47,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:47,563 INFO L82 PathProgramCache]: Analyzing trace with hash -886661367, now seen corresponding path program 6 times [2021-05-02 12:11:47,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:47,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362904835] [2021-05-02 12:11:47,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:47,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:47,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:47,682 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 151 proven. 21 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2021-05-02 12:11:47,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:47,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362904835] [2021-05-02 12:11:47,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362904835] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:47,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027774915] [2021-05-02 12:11:47,682 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 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 12:11:47,812 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-05-02 12:11:47,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:11:47,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-02 12:11:47,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:47,879 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:47,904 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 254 proven. 21 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-05-02 12:11:47,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027774915] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:47,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:47,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-05-02 12:11:47,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112858464] [2021-05-02 12:11:47,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 12:11:47,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:47,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 12:11:47,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:11:47,906 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:48,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:48,082 INFO L93 Difference]: Finished difference Result 86 states and 97 transitions. [2021-05-02 12:11:48,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 12:11:48,082 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-05-02 12:11:48,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:48,084 INFO L225 Difference]: With dead ends: 86 [2021-05-02 12:11:48,084 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 12:11:48,085 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 191.6ms TimeCoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:11:48,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 12:11:48,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-05-02 12:11:48,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:48,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-05-02 12:11:48,106 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 47 [2021-05-02 12:11:48,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:48,107 INFO L480 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-05-02 12:11:48,107 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:48,108 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-05-02 12:11:48,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-05-02 12:11:48,111 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:48,111 INFO L523 BasicCegarLoop]: trace histogram [28, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:48,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:11:48,312 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:48,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:48,313 INFO L82 PathProgramCache]: Analyzing trace with hash -421354163, now seen corresponding path program 7 times [2021-05-02 12:11:48,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:48,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694993440] [2021-05-02 12:11:48,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:48,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:48,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:48,409 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 12:11:48,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:48,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694993440] [2021-05-02 12:11:48,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694993440] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:48,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524105919] [2021-05-02 12:11:48,409 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 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 12:11:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:48,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-02 12:11:48,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:48,556 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:48,595 INFO L134 CoverageAnalysis]: Checked inductivity of 512 backedges. 196 proven. 28 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-05-02 12:11:48,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524105919] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:48,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:48,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-05-02 12:11:48,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621949569] [2021-05-02 12:11:48,596 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 12:11:48,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:48,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 12:11:48,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:11:48,596 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:48,831 INFO L93 Difference]: Finished difference Result 93 states and 104 transitions. [2021-05-02 12:11:48,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 12:11:48,832 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-05-02 12:11:48,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:48,832 INFO L225 Difference]: With dead ends: 93 [2021-05-02 12:11:48,832 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 12:11:48,833 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2021-05-02 12:11:48,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 12:11:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-05-02 12:11:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-05-02 12:11:48,839 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 51 [2021-05-02 12:11:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:48,839 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-05-02 12:11:48,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-05-02 12:11:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 12:11:48,839 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:48,839 INFO L523 BasicCegarLoop]: trace histogram [32, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:49,054 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:11:49,055 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:49,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:49,055 INFO L82 PathProgramCache]: Analyzing trace with hash 651428873, now seen corresponding path program 8 times [2021-05-02 12:11:49,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:49,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451322630] [2021-05-02 12:11:49,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:49,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:49,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:49,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:49,178 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 247 proven. 36 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2021-05-02 12:11:49,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:49,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451322630] [2021-05-02 12:11:49,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451322630] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:49,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456898598] [2021-05-02 12:11:49,178 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 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 12:11:49,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:11:49,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:11:49,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 11 conjunts are in the unsatisfiable core [2021-05-02 12:11:49,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 646 backedges. 0 proven. 502 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-05-02 12:11:49,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456898598] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:49,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:49,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7] total 17 [2021-05-02 12:11:49,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166419639] [2021-05-02 12:11:49,384 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 12:11:49,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:49,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 12:11:49,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:11:49,385 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:51,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:51,320 INFO L93 Difference]: Finished difference Result 123 states and 139 transitions. [2021-05-02 12:11:51,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 12:11:51,320 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-05-02 12:11:51,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:51,321 INFO L225 Difference]: With dead ends: 123 [2021-05-02 12:11:51,321 INFO L226 Difference]: Without dead ends: 83 [2021-05-02 12:11:51,322 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 1604.3ms TimeCoverageRelationStatistics Valid=546, Invalid=5154, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 12:11:51,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-05-02 12:11:51,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 72. [2021-05-02 12:11:51,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 67 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:51,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2021-05-02 12:11:51,331 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2021-05-02 12:11:51,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:51,331 INFO L480 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2021-05-02 12:11:51,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:51,332 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2021-05-02 12:11:51,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-05-02 12:11:51,333 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:51,333 INFO L523 BasicCegarLoop]: trace histogram [45, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:51,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-05-02 12:11:51,548 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:51,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:51,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1471480190, now seen corresponding path program 9 times [2021-05-02 12:11:51,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:51,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100533534] [2021-05-02 12:11:51,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:51,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:51,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 405 proven. 45 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2021-05-02 12:11:51,714 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:51,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100533534] [2021-05-02 12:11:51,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100533534] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:51,714 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960287046] [2021-05-02 12:11:51,714 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 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 12:11:51,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-05-02 12:11:51,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:11:51,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-02 12:11:51,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:52,001 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:52,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 409 proven. 45 refuted. 0 times theorem prover too weak. 796 trivial. 0 not checked. [2021-05-02 12:11:52,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960287046] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:52,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:52,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-02 12:11:52,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163210587] [2021-05-02 12:11:52,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 12:11:52,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:52,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 12:11:52,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:11:52,009 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:52,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:52,301 INFO L93 Difference]: Finished difference Result 132 states and 146 transitions. [2021-05-02 12:11:52,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 12:11:52,301 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-05-02 12:11:52,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:52,302 INFO L225 Difference]: With dead ends: 132 [2021-05-02 12:11:52,302 INFO L226 Difference]: Without dead ends: 77 [2021-05-02 12:11:52,302 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 324.0ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:11:52,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-02 12:11:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-05-02 12:11:52,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 72 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:52,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 82 transitions. [2021-05-02 12:11:52,309 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 82 transitions. Word has length 71 [2021-05-02 12:11:52,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:52,310 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 82 transitions. [2021-05-02 12:11:52,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:52,310 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 82 transitions. [2021-05-02 12:11:52,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 12:11:52,310 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:52,310 INFO L523 BasicCegarLoop]: trace histogram [50, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:52,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:11:52,511 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:52,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:52,512 INFO L82 PathProgramCache]: Analyzing trace with hash -445755741, now seen corresponding path program 10 times [2021-05-02 12:11:52,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:52,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598972237] [2021-05-02 12:11:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:52,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:52,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:52,636 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-05-02 12:11:52,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:52,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598972237] [2021-05-02 12:11:52,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598972237] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:52,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193167208] [2021-05-02 12:11:52,636 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 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 12:11:52,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-02 12:11:52,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:11:52,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-02 12:11:52,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:52,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:52,820 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 1235 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-05-02 12:11:52,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193167208] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:52,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:52,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 12 [2021-05-02 12:11:52,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326951479] [2021-05-02 12:11:52,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 12:11:52,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:52,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 12:11:52,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:11:52,857 INFO L87 Difference]: Start difference. First operand 77 states and 82 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:53,113 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2021-05-02 12:11:53,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:11:53,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-02 12:11:53,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:53,114 INFO L225 Difference]: With dead ends: 107 [2021-05-02 12:11:53,114 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 12:11:53,115 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:11:53,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 12:11:53,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 90. [2021-05-02 12:11:53,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:53,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2021-05-02 12:11:53,128 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 76 [2021-05-02 12:11:53,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:53,128 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2021-05-02 12:11:53,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 10 states have internal predecessors, (32), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:53,129 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2021-05-02 12:11:53,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-05-02 12:11:53,129 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:53,129 INFO L523 BasicCegarLoop]: trace histogram [60, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:53,340 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:11:53,341 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:53,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:53,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1359606601, now seen corresponding path program 11 times [2021-05-02 12:11:53,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:53,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133287280] [2021-05-02 12:11:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:53,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:53,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:53,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 0 proven. 1851 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2021-05-02 12:11:53,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:53,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133287280] [2021-05-02 12:11:53,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133287280] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:53,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230246803] [2021-05-02 12:11:53,486 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 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 12:11:55,243 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-05-02 12:11:55,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:11:55,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 151 conjunts are in the unsatisfiable core [2021-05-02 12:11:55,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:11:55,267 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,268 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,273 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,276 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,280 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,282 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,439 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,472 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,473 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,477 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,478 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,482 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,484 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:55,741 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,383 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,385 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,389 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,404 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,406 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,640 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,644 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,649 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,650 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,652 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,654 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,657 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,838 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,839 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,842 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,843 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,889 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:11:56,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2181 backedges. 114 proven. 2015 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-05-02 12:11:56,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230246803] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:56,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:11:56,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 51] total 53 [2021-05-02 12:11:56,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157334318] [2021-05-02 12:11:56,897 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 12:11:56,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:11:56,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 12:11:56,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=2521, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 12:11:56,898 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand has 53 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 52 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:58,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:11:58,858 INFO L93 Difference]: Finished difference Result 162 states and 175 transitions. [2021-05-02 12:11:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 12:11:58,859 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 52 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-05-02 12:11:58,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:11:58,860 INFO L225 Difference]: With dead ends: 162 [2021-05-02 12:11:58,860 INFO L226 Difference]: Without dead ends: 115 [2021-05-02 12:11:58,862 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3734 ImplicationChecksByTransitivity, 2766.0ms TimeCoverageRelationStatistics Valid=646, Invalid=9656, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 12:11:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-05-02 12:11:58,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 103. [2021-05-02 12:11:58,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0714285714285714) internal successors, (105), 98 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 109 transitions. [2021-05-02 12:11:58,872 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 109 transitions. Word has length 89 [2021-05-02 12:11:58,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:11:58,872 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 109 transitions. [2021-05-02 12:11:58,872 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 1.5471698113207548) internal successors, (82), 52 states have internal predecessors, (82), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:11:58,872 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 109 transitions. [2021-05-02 12:11:58,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 12:11:58,873 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:11:58,873 INFO L523 BasicCegarLoop]: trace histogram [70, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:11:59,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-05-02 12:11:59,077 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:11:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:11:59,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1682541667, now seen corresponding path program 12 times [2021-05-02 12:11:59,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:11:59,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045829004] [2021-05-02 12:11:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:11:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:59,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:11:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:11:59,213 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 0 proven. 2590 refuted. 0 times theorem prover too weak. 385 trivial. 0 not checked. [2021-05-02 12:11:59,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:11:59,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045829004] [2021-05-02 12:11:59,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045829004] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:11:59,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760808206] [2021-05-02 12:11:59,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:12:00,841 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-05-02 12:12:00,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:12:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-02 12:12:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:12:01,041 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:01,048 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:12:01,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2975 backedges. 739 proven. 0 refuted. 0 times theorem prover too weak. 2236 trivial. 0 not checked. [2021-05-02 12:12:01,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760808206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:12:01,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:12:01,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [11] total 16 [2021-05-02 12:12:01,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155831824] [2021-05-02 12:12:01,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:12:01,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:12:01,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:12:01,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-05-02 12:12:01,152 INFO L87 Difference]: Start difference. First operand 103 states and 109 transitions. Second operand has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:12:01,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:12:01,282 INFO L93 Difference]: Finished difference Result 103 states and 109 transitions. [2021-05-02 12:12:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:12:01,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 12:12:01,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:12:01,283 INFO L225 Difference]: With dead ends: 103 [2021-05-02 12:12:01,283 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:12:01,284 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:12:01,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:12:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:12:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-02 12:12:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:12:01,284 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 102 [2021-05-02 12:12:01,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:12:01,284 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:12:01,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:12:01,284 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:12:01,284 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:12:01,485 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-02 12:12:01,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:12:01,810 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 343 DAG size of output: 88 [2021-05-02 12:12:02,019 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 30 [2021-05-02 12:12:02,096 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 12:12:02,096 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 12:12:02,096 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 12:12:02,096 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:12:02,097 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 12:12:02,097 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:12:02,097 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:12:02,097 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 12:12:02,097 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:12:02,097 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:12:02,097 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 12 27) no Hoare annotation was computed. [2021-05-02 12:12:02,097 INFO L194 CegarLoopUtils]: At program point L19-2(lines 19 21) the Hoare annotation is: (let ((.cse0 (= main_~x~0 0))) (or (and (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (< (mod main_~x~0 4294967296) 268435455)) (and (<= main_~y~0 4) (< 0 (+ (div main_~y~0 4294967296) 1)) .cse0) (and (< (mod (+ main_~y~0 4294967291) 4294967296) 10) .cse0 (< (mod (+ main_~y~0 4294967295) 4294967296) 10)))) [2021-05-02 12:12:02,097 INFO L198 CegarLoopUtils]: For program point L19-3(lines 19 21) no Hoare annotation was computed. [2021-05-02 12:12:02,097 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 12 27) no Hoare annotation was computed. [2021-05-02 12:12:02,097 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 12 27) the Hoare annotation is: true [2021-05-02 12:12:02,097 INFO L194 CegarLoopUtils]: At program point L16-2(lines 16 24) the Hoare annotation is: (or (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (and (= main_~y~0 0) (= main_~x~0 0))) [2021-05-02 12:12:02,097 INFO L194 CegarLoopUtils]: At program point L16-3(lines 16 24) the Hoare annotation is: (and (< (mod (+ main_~x~0 4294967295) 4294967296) 268435455) (<= 268435455 (mod main_~x~0 4294967296))) [2021-05-02 12:12:02,097 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-05-02 12:12:02,097 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2021-05-02 12:12:02,097 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-02 12:12:02,097 INFO L198 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-05-02 12:12:02,097 INFO L198 CegarLoopUtils]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2021-05-02 12:12:02,098 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-05-02 12:12:02,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:12:02 BoogieIcfgContainer [2021-05-02 12:12:02,111 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:12:02,112 INFO L168 Benchmark]: Toolchain (without parser) took 20300.90 ms. Allocated memory was 199.2 MB in the beginning and 333.4 MB in the end (delta: 134.2 MB). Free memory was 165.5 MB in the beginning and 302.1 MB in the end (delta: -136.6 MB). Peak memory consumption was 184.4 MB. Max. memory is 8.0 GB. [2021-05-02 12:12:02,112 INFO L168 Benchmark]: CDTParser took 0.08 ms. Allocated memory is still 199.2 MB. Free memory is still 181.9 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:12:02,112 INFO L168 Benchmark]: CACSL2BoogieTranslator took 176.68 ms. Allocated memory is still 199.2 MB. Free memory was 165.3 MB in the beginning and 156.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-05-02 12:12:02,112 INFO L168 Benchmark]: Boogie Preprocessor took 71.55 ms. Allocated memory is still 199.2 MB. Free memory was 156.1 MB in the beginning and 183.4 MB in the end (delta: -27.3 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. [2021-05-02 12:12:02,112 INFO L168 Benchmark]: RCFGBuilder took 251.10 ms. Allocated memory is still 199.2 MB. Free memory was 183.2 MB in the beginning and 170.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 12:12:02,112 INFO L168 Benchmark]: TraceAbstraction took 19785.03 ms. Allocated memory was 199.2 MB in the beginning and 333.4 MB in the end (delta: 134.2 MB). Free memory was 169.8 MB in the beginning and 302.1 MB in the end (delta: -132.3 MB). Peak memory consumption was 189.4 MB. Max. memory is 8.0 GB. [2021-05-02 12:12:02,112 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08 ms. Allocated memory is still 199.2 MB. Free memory is still 181.9 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 176.68 ms. Allocated memory is still 199.2 MB. Free memory was 165.3 MB in the beginning and 156.1 MB in the end (delta: 9.2 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 71.55 ms. Allocated memory is still 199.2 MB. Free memory was 156.1 MB in the beginning and 183.4 MB in the end (delta: -27.3 MB). Peak memory consumption was 4.5 MB. Max. memory is 8.0 GB. * RCFGBuilder took 251.10 ms. Allocated memory is still 199.2 MB. Free memory was 183.2 MB in the beginning and 170.2 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 19785.03 ms. Allocated memory was 199.2 MB in the beginning and 333.4 MB in the end (delta: 134.2 MB). Free memory was 169.8 MB in the beginning and 302.1 MB in the end (delta: -132.3 MB). Peak memory consumption was 189.4 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19110.3ms, OverallIterations: 14, TraceHistogramMax: 70, EmptinessCheckTime: 38.9ms, AutomataDifference: 7312.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 610.5ms, InitialAbstractionConstructionTime: 15.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 199 SDtfs, 278 SDslu, 439 SDs, 0 SdLazy, 3099 SolverSat, 405 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1509.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 967 GetRequests, 585 SyntacticMatches, 13 SemanticMatches, 369 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6135 ImplicationChecksByTransitivity, 7606.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=103occurred in iteration=13, InterpolantAutomatonStates: 250, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 161.8ms AutomataMinimizationTime, 14 MinimizatonAttempts, 53 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 8 LocationsWithAnnotation, 21 PreInvPairs, 107 NumberOfFragments, 109 HoareAnnotationTreeSize, 21 FomulaSimplifications, 188403 FormulaSimplificationTreeSizeReduction, 332.6ms HoareSimplificationTime, 8 FomulaSimplificationsInter, 589 FormulaSimplificationTreeSizeReductionInter, 269.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 158.1ms SsaConstructionTime, 4034.2ms SatisfiabilityAnalysisTime, 4409.3ms InterpolantComputationTime, 1287 NumberOfCodeBlocks, 1091 NumberOfCodeBlocksAsserted, 109 NumberOfCheckSat, 1261 ConstructedInterpolants, 0 QuantifiedInterpolants, 4912 SizeOfPredicates, 20 NumberOfNonLiveVariables, 1758 ConjunctsInSsa, 299 ConjunctsInUnsatCore, 26 InterpolantComputations, 3 PerfectInterpolantSequences, 10134/19941 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: (((x + 4294967295) % 4294967296 < 268435455 && x % 4294967296 < 268435455) || ((y <= 4 && 0 < y / 4294967296 + 1) && x == 0)) || (((y + 4294967291) % 4294967296 < 10 && x == 0) && (y + 4294967295) % 4294967296 < 10) - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: (x + 4294967295) % 4294967296 < 268435455 || (y == 0 && x == 0) RESULT: Ultimate proved your program to be correct! Received shutdown request...