/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-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:33:14,164 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:33:14,166 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:33:14,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:33:14,202 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:33:14,203 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:33:14,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:33:14,204 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:33:14,205 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:33:14,209 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:33:14,211 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:33:14,223 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:33:14,224 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:33:14,227 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:33:14,228 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:33:14,228 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:33:14,230 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:33:14,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:33:14,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:33:14,236 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:33:14,237 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 12:33:14,254 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:33:14,254 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:33:14,255 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:33:14,255 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:33:14,255 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:33:14,256 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:33:14,256 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:33:14,256 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:33:14,256 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:33:14,256 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:33:14,256 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:33:14,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:33:14,257 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:33:14,257 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:33:14,257 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:33:14,257 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:33:14,257 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:33:14,257 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:33:14,257 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:33:14,258 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:33:14,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:33:14,258 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:33:14,258 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:33:14,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:33:14,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:33:14,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:33:14,259 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:33:14,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:33:14,259 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:33:14,528 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:33:14,548 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:33:14,550 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:33:14,551 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:33:14,552 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:33:14,552 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2021-05-02 12:33:14,616 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/961eba62b/43ae053a912d40caa7bb78dbf1e0e28b/FLAGf02a3df29 [2021-05-02 12:33:14,935 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:33:14,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2021-05-02 12:33:14,940 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/961eba62b/43ae053a912d40caa7bb78dbf1e0e28b/FLAGf02a3df29 [2021-05-02 12:33:15,356 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/961eba62b/43ae053a912d40caa7bb78dbf1e0e28b [2021-05-02 12:33:15,359 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:33:15,361 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:33:15,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:33:15,363 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:33:15,365 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:33:15,366 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:33:15" (1/1) ... [2021-05-02 12:33:15,368 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@237a2ebd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:15, skipping insertion in model container [2021-05-02 12:33:15,368 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:33:15" (1/1) ... [2021-05-02 12:33:15,373 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:33:15,384 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:33:15,477 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-invgen/nested6.i[893,906] [2021-05-02 12:33:15,484 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:33:15,488 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:33:15,533 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-invgen/nested6.i[893,906] [2021-05-02 12:33:15,536 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:33:15,545 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:33:15,545 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:15 WrapperNode [2021-05-02 12:33:15,545 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:33:15,546 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:33:15,546 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:33:15,546 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:33:15,553 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:15" (1/1) ... [2021-05-02 12:33:15,553 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:15" (1/1) ... [2021-05-02 12:33:15,557 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:15" (1/1) ... [2021-05-02 12:33:15,557 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:15" (1/1) ... [2021-05-02 12:33:15,560 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:15" (1/1) ... [2021-05-02 12:33:15,563 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:15" (1/1) ... [2021-05-02 12:33:15,564 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:15" (1/1) ... [2021-05-02 12:33:15,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:33:15,565 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:33:15,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:33:15,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:33:15,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:15" (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 12:33:15,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:33:15,624 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:33:15,624 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:33:15,625 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 12:33:15,625 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:33:15,625 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:33:15,626 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:33:15,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:33:15,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:33:15,626 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:33:15,626 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:33:15,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:33:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 12:33:15,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:33:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:33:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:33:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:33:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:33:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:33:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:33:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:33:15,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:33:15,864 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:33:15,864 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-05-02 12:33:15,865 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:33:15 BoogieIcfgContainer [2021-05-02 12:33:15,865 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:33:15,866 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:33:15,866 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:33:15,868 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:33:15,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:33:15" (1/3) ... [2021-05-02 12:33:15,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6974cd10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:33:15, skipping insertion in model container [2021-05-02 12:33:15,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:33:15" (2/3) ... [2021-05-02 12:33:15,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6974cd10 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:33:15, skipping insertion in model container [2021-05-02 12:33:15,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:33:15" (3/3) ... [2021-05-02 12:33:15,870 INFO L111 eAbstractionObserver]: Analyzing ICFG nested6.i [2021-05-02 12:33:15,873 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:33:15,882 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:33:15,898 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:33:15,913 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:33:15,913 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:33:15,913 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:33:15,913 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:33:15,913 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:33:15,913 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:33:15,913 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:33:15,913 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:33:15,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 12:33:15,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 12:33:15,926 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:15,926 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:15,926 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:15,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:15,930 INFO L82 PathProgramCache]: Analyzing trace with hash -380972064, now seen corresponding path program 1 times [2021-05-02 12:33:15,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:15,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059832312] [2021-05-02 12:33:15,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:16,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:16,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:16,133 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 12:33:16,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:16,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059832312] [2021-05-02 12:33:16,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059832312] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:33:16,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:33:16,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 12:33:16,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152241729] [2021-05-02 12:33:16,137 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:33:16,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:16,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:33:16,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:33:16,146 INFO L87 Difference]: Start difference. First operand has 30 states, 20 states have (on average 1.55) internal successors, (31), 22 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12:33:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:16,374 INFO L93 Difference]: Finished difference Result 58 states and 81 transitions. [2021-05-02 12:33:16,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:33:16,376 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2021-05-02 12:33:16,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:16,380 INFO L225 Difference]: With dead ends: 58 [2021-05-02 12:33:16,380 INFO L226 Difference]: Without dead ends: 29 [2021-05-02 12:33:16,382 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 123.1ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:33:16,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-05-02 12:33:16,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-05-02 12:33:16,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 12:33:16,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2021-05-02 12:33:16,413 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 16 [2021-05-02 12:33:16,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:16,413 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2021-05-02 12:33:16,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 4 states have internal predecessors, (12), 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 12:33:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2021-05-02 12:33:16,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 12:33:16,414 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:16,414 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:16,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:33:16,415 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:16,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:16,415 INFO L82 PathProgramCache]: Analyzing trace with hash 580085489, now seen corresponding path program 1 times [2021-05-02 12:33:16,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:16,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963368706] [2021-05-02 12:33:16,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:16,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:16,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:16,521 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 12:33:16,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:16,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963368706] [2021-05-02 12:33:16,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963368706] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:33:16,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:33:16,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 12:33:16,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559897776] [2021-05-02 12:33:16,523 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:33:16,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:16,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:33:16,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:33:16,524 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 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 12:33:16,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:16,760 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-05-02 12:33:16,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:33:16,761 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 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 17 [2021-05-02 12:33:16,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:16,763 INFO L225 Difference]: With dead ends: 41 [2021-05-02 12:33:16,763 INFO L226 Difference]: Without dead ends: 39 [2021-05-02 12:33:16,765 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-05-02 12:33:16,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-05-02 12:33:16,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 33. [2021-05-02 12:33:16,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-05-02 12:33:16,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2021-05-02 12:33:16,786 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 17 [2021-05-02 12:33:16,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:16,786 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2021-05-02 12:33:16,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 5 states have internal predecessors, (13), 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 12:33:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2021-05-02 12:33:16,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-02 12:33:16,789 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:16,789 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:16,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 12:33:16,789 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:16,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:16,790 INFO L82 PathProgramCache]: Analyzing trace with hash -132185391, now seen corresponding path program 1 times [2021-05-02 12:33:16,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:16,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650021377] [2021-05-02 12:33:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:16,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:16,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:16,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 12:33:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:16,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:16,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650021377] [2021-05-02 12:33:16,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650021377] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:33:16,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:33:16,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 12:33:16,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002068282] [2021-05-02 12:33:16,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:33:16,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:16,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:33:16,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:33:16,889 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:33:17,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:17,044 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-05-02 12:33:17,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 12:33:17,045 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2021-05-02 12:33:17,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:17,047 INFO L225 Difference]: With dead ends: 46 [2021-05-02 12:33:17,047 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 12:33:17,048 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:33:17,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 12:33:17,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-05-02 12:33:17,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 32 states have internal predecessors, (37), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 12:33:17,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2021-05-02 12:33:17,062 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 21 [2021-05-02 12:33:17,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:17,062 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2021-05-02 12:33:17,062 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:33:17,062 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2021-05-02 12:33:17,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-02 12:33:17,063 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:17,063 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:17,063 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 12:33:17,063 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:17,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:17,064 INFO L82 PathProgramCache]: Analyzing trace with hash -512108736, now seen corresponding path program 1 times [2021-05-02 12:33:17,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:17,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234867264] [2021-05-02 12:33:17,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:17,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:17,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:17,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-05-02 12:33:17,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:33:17,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:17,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234867264] [2021-05-02 12:33:17,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234867264] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:17,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823112097] [2021-05-02 12:33:17,129 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 12:33:17,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:17,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 12:33:17,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:17,242 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:17,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:17,372 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:17,397 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 12:33:17,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823112097] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:33:17,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:33:17,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 11 [2021-05-02 12:33:17,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064834325] [2021-05-02 12:33:17,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 12:33:17,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:17,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 12:33:17,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:33:17,399 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:33:17,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:17,479 INFO L93 Difference]: Finished difference Result 107 states and 137 transitions. [2021-05-02 12:33:17,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 12:33:17,480 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2021-05-02 12:33:17,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:17,482 INFO L225 Difference]: With dead ends: 107 [2021-05-02 12:33:17,482 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 12:33:17,483 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:33:17,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 12:33:17,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 48. [2021-05-02 12:33:17,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 35 states have (on average 1.2) internal successors, (42), 36 states have internal predecessors, (42), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-02 12:33:17,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2021-05-02 12:33:17,503 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 25 [2021-05-02 12:33:17,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:17,503 INFO L480 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2021-05-02 12:33:17,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-05-02 12:33:17,504 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2021-05-02 12:33:17,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 12:33:17,504 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:17,505 INFO L523 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:17,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:17,720 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:17,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1758799342, now seen corresponding path program 1 times [2021-05-02 12:33:17,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:17,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743942586] [2021-05-02 12:33:17,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:17,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:17,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:17,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:17,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 12:33:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:17,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-05-02 12:33:17,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:17,867 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-05-02 12:33:17,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:17,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743942586] [2021-05-02 12:33:17,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743942586] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:17,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502160597] [2021-05-02 12:33:17,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:17,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 12:33:17,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:17,972 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:17,974 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:17,991 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:17,995 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:18,007 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:18,033 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:18,036 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:18,068 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-02 12:33:18,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502160597] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:18,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:18,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 14 [2021-05-02 12:33:18,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866610345] [2021-05-02 12:33:18,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 12:33:18,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:18,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 12:33:18,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:33:18,076 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 12:33:18,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:18,846 INFO L93 Difference]: Finished difference Result 118 states and 153 transitions. [2021-05-02 12:33:18,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 12:33:18,847 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 32 [2021-05-02 12:33:18,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:18,848 INFO L225 Difference]: With dead ends: 118 [2021-05-02 12:33:18,848 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 12:33:18,849 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 585.3ms TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 12:33:18,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 12:33:18,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 66. [2021-05-02 12:33:18,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 48 states have (on average 1.25) internal successors, (60), 50 states have internal predecessors, (60), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-05-02 12:33:18,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 83 transitions. [2021-05-02 12:33:18,858 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 83 transitions. Word has length 32 [2021-05-02 12:33:18,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:18,858 INFO L480 AbstractCegarLoop]: Abstraction has 66 states and 83 transitions. [2021-05-02 12:33:18,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 11 states have internal predecessors, (36), 5 states have call successors, (9), 4 states have call predecessors, (9), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-05-02 12:33:18,858 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 83 transitions. [2021-05-02 12:33:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 12:33:18,859 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:18,859 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:19,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:19,071 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:19,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:19,072 INFO L82 PathProgramCache]: Analyzing trace with hash 712456319, now seen corresponding path program 1 times [2021-05-02 12:33:19,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:19,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781641804] [2021-05-02 12:33:19,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:19,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:19,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:19,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:19,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2021-05-02 12:33:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:19,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-05-02 12:33:19,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:19,185 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-05-02 12:33:19,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:19,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781641804] [2021-05-02 12:33:19,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781641804] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:19,185 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501056101] [2021-05-02 12:33:19,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:19,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 12:33:19,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:19,272 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:19,289 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:19,293 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:19,306 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:19,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:19,321 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:19,342 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:19,345 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:19,365 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-02 12:33:19,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501056101] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:19,389 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:19,389 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-05-02 12:33:19,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586857937] [2021-05-02 12:33:19,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 12:33:19,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:19,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 12:33:19,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-05-02 12:33:19,390 INFO L87 Difference]: Start difference. First operand 66 states and 83 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 12:33:19,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:19,714 INFO L93 Difference]: Finished difference Result 129 states and 163 transitions. [2021-05-02 12:33:19,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 12:33:19,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 42 [2021-05-02 12:33:19,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:19,715 INFO L225 Difference]: With dead ends: 129 [2021-05-02 12:33:19,715 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 12:33:19,716 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 203.0ms TimeCoverageRelationStatistics Valid=116, Invalid=346, Unknown=0, NotChecked=0, Total=462 [2021-05-02 12:33:19,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 12:33:19,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2021-05-02 12:33:19,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 52 states have (on average 1.25) internal successors, (65), 54 states have internal predecessors, (65), 13 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2021-05-02 12:33:19,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 90 transitions. [2021-05-02 12:33:19,725 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 90 transitions. Word has length 42 [2021-05-02 12:33:19,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:19,725 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 90 transitions. [2021-05-02 12:33:19,725 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 14 states have internal predecessors, (44), 4 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-05-02 12:33:19,725 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 90 transitions. [2021-05-02 12:33:19,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 12:33:19,726 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:19,726 INFO L523 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:19,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:19,941 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:19,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:19,942 INFO L82 PathProgramCache]: Analyzing trace with hash -729588824, now seen corresponding path program 1 times [2021-05-02 12:33:19,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:19,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385545866] [2021-05-02 12:33:19,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:19,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 12:33:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 12:33:20,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-05-02 12:33:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,028 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 20 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 12:33:20,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:20,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385545866] [2021-05-02 12:33:20,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385545866] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:20,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118395913] [2021-05-02 12:33:20,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-02 12:33:20,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:20,098 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,099 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,107 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,108 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,116 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,118 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,129 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,139 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,141 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,156 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 26 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-05-02 12:33:20,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118395913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:20,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:20,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-05-02 12:33:20,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946521147] [2021-05-02 12:33:20,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 12:33:20,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:20,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 12:33:20,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:33:20,176 INFO L87 Difference]: Start difference. First operand 71 states and 90 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 12:33:20,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:20,409 INFO L93 Difference]: Finished difference Result 138 states and 178 transitions. [2021-05-02 12:33:20,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 12:33:20,409 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) Word has length 44 [2021-05-02 12:33:20,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:20,410 INFO L225 Difference]: With dead ends: 138 [2021-05-02 12:33:20,410 INFO L226 Difference]: Without dead ends: 93 [2021-05-02 12:33:20,411 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 142.3ms TimeCoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-05-02 12:33:20,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-05-02 12:33:20,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 78. [2021-05-02 12:33:20,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 56 states have (on average 1.25) internal successors, (70), 59 states have internal predecessors, (70), 16 states have call successors, (16), 6 states have call predecessors, (16), 5 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2021-05-02 12:33:20,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2021-05-02 12:33:20,420 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 44 [2021-05-02 12:33:20,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:20,420 INFO L480 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2021-05-02 12:33:20,420 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2021-05-02 12:33:20,421 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2021-05-02 12:33:20,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-05-02 12:33:20,421 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:33:20,422 INFO L523 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:33:20,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:20,637 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:33:20,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:33:20,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1219400377, now seen corresponding path program 1 times [2021-05-02 12:33:20,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:33:20,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394345103] [2021-05-02 12:33:20,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:33:20,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:33:20,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-05-02 12:33:20,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2021-05-02 12:33:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2021-05-02 12:33:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2021-05-02 12:33:20,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,692 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-05-02 12:33:20,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:33:20,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394345103] [2021-05-02 12:33:20,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394345103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:20,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1197175723] [2021-05-02 12:33:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 12:33:20,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:33:20,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 12:33:20,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:33:20,773 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,774 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,783 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,784 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,792 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,793 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,803 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,813 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,815 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,822 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,823 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,832 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,852 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,854 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,866 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,884 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:33:20,904 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 9 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-05-02 12:33:20,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1197175723] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:33:20,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:33:20,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-05-02 12:33:20,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972993340] [2021-05-02 12:33:20,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 12:33:20,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:33:20,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 12:33:20,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:33:20,905 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 12 states have internal predecessors, (58), 5 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 12:33:21,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:33:21,823 INFO L93 Difference]: Finished difference Result 166 states and 226 transitions. [2021-05-02 12:33:21,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 12:33:21,823 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 12 states have internal predecessors, (58), 5 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) Word has length 55 [2021-05-02 12:33:21,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:33:21,824 INFO L225 Difference]: With dead ends: 166 [2021-05-02 12:33:21,824 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:33:21,825 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 662.0ms TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 12:33:21,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:33:21,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:33:21,825 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 12:33:21,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:33:21,826 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 55 [2021-05-02 12:33:21,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:33:21,826 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:33:21,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 12 states have internal predecessors, (58), 5 states have call successors, (13), 4 states have call predecessors, (13), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-05-02 12:33:21,826 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:33:21,826 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:33:22,048 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:33:22,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:33:22,756 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 11 [2021-05-02 12:33:22,758 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 12:33:22,759 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 12:33:22,759 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 12:33:22,759 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:33:22,759 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string0.offset| |old(#t~string0.offset)|) (= |old(#length)| |#length|) (= |#t~string1.base| |old(#t~string1.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string0.base| |old(#t~string0.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|) (= |#t~string1.offset| |old(#t~string1.offset)|)) [2021-05-02 12:33:22,759 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:33:22,759 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:33:22,759 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 12:33:22,759 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:33:22,759 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:33:22,759 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-02 12:33:22,759 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:33:22,760 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:33:22,760 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:33:22,760 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 24 48) no Hoare annotation was computed. [2021-05-02 12:33:22,760 INFO L194 CegarLoopUtils]: At program point L36-2(lines 36 38) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0))) [2021-05-02 12:33:22,760 INFO L198 CegarLoopUtils]: For program point L28(line 28) no Hoare annotation was computed. [2021-05-02 12:33:22,760 INFO L194 CegarLoopUtils]: At program point L41(line 41) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2021-05-02 12:33:22,760 INFO L194 CegarLoopUtils]: At program point L41-1(line 41) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2021-05-02 12:33:22,760 INFO L194 CegarLoopUtils]: At program point L37(line 37) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0))) [2021-05-02 12:33:22,760 INFO L198 CegarLoopUtils]: For program point L37-1(lines 36 38) no Hoare annotation was computed. [2021-05-02 12:33:22,760 INFO L198 CegarLoopUtils]: For program point L33-2(lines 33 45) no Hoare annotation was computed. [2021-05-02 12:33:22,760 INFO L194 CegarLoopUtils]: At program point L33-3(lines 33 45) the Hoare annotation is: (let ((.cse0 (<= main_~n~0 main_~k~0)) (.cse1 (<= main_~k~0 main_~n~0))) (or (and (<= main_~n~0 main_~j~0) .cse0 .cse1) (and (= main_~i~0 0) .cse0 .cse1))) [2021-05-02 12:33:22,760 INFO L198 CegarLoopUtils]: For program point L29(lines 29 32) no Hoare annotation was computed. [2021-05-02 12:33:22,760 INFO L198 CegarLoopUtils]: For program point L29-1(lines 29 32) no Hoare annotation was computed. [2021-05-02 12:33:22,760 INFO L201 CegarLoopUtils]: At program point L46(lines 24 48) the Hoare annotation is: true [2021-05-02 12:33:22,760 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 24 48) no Hoare annotation was computed. [2021-05-02 12:33:22,760 INFO L198 CegarLoopUtils]: For program point L42(lines 34 44) no Hoare annotation was computed. [2021-05-02 12:33:22,760 INFO L194 CegarLoopUtils]: At program point L34-2(lines 34 44) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= main_~k~0 main_~n~0)) [2021-05-02 12:33:22,761 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 48) the Hoare annotation is: true [2021-05-02 12:33:22,761 INFO L198 CegarLoopUtils]: For program point L35(lines 35 43) no Hoare annotation was computed. [2021-05-02 12:33:22,761 INFO L198 CegarLoopUtils]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:33:22,761 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-02 12:33:22,761 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:33:22,761 INFO L198 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-05-02 12:33:22,761 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-05-02 12:33:22,762 INFO L198 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-05-02 12:33:22,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:33:22 BoogieIcfgContainer [2021-05-02 12:33:22,774 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:33:22,775 INFO L168 Benchmark]: Toolchain (without parser) took 7414.31 ms. Allocated memory was 212.9 MB in the beginning and 327.2 MB in the end (delta: 114.3 MB). Free memory was 176.6 MB in the beginning and 301.3 MB in the end (delta: -124.7 MB). Peak memory consumption was 173.3 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:22,775 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 212.9 MB. Free memory is still 193.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:33:22,775 INFO L168 Benchmark]: CACSL2BoogieTranslator took 182.59 ms. Allocated memory is still 212.9 MB. Free memory was 176.5 MB in the beginning and 195.4 MB in the end (delta: -18.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:22,775 INFO L168 Benchmark]: Boogie Preprocessor took 18.99 ms. Allocated memory is still 212.9 MB. Free memory was 195.4 MB in the beginning and 193.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:22,775 INFO L168 Benchmark]: RCFGBuilder took 299.43 ms. Allocated memory is still 212.9 MB. Free memory was 193.8 MB in the beginning and 176.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:22,775 INFO L168 Benchmark]: TraceAbstraction took 6908.44 ms. Allocated memory was 212.9 MB in the beginning and 327.2 MB in the end (delta: 114.3 MB). Free memory was 176.5 MB in the beginning and 301.3 MB in the end (delta: -124.8 MB). Peak memory consumption was 174.1 MB. Max. memory is 8.0 GB. [2021-05-02 12:33:22,776 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 212.9 MB. Free memory is still 193.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 182.59 ms. Allocated memory is still 212.9 MB. Free memory was 176.5 MB in the beginning and 195.4 MB in the end (delta: -18.9 MB). Peak memory consumption was 10.8 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 18.99 ms. Allocated memory is still 212.9 MB. Free memory was 195.4 MB in the beginning and 193.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 299.43 ms. Allocated memory is still 212.9 MB. Free memory was 193.8 MB in the beginning and 176.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 6908.44 ms. Allocated memory was 212.9 MB in the beginning and 327.2 MB in the end (delta: 114.3 MB). Free memory was 176.5 MB in the beginning and 301.3 MB in the end (delta: -124.8 MB). Peak memory consumption was 174.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 19]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 6138.0ms, OverallIterations: 8, TraceHistogramMax: 5, EmptinessCheckTime: 12.0ms, AutomataDifference: 2989.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 708.9ms, InitialAbstractionConstructionTime: 6.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 176 SDtfs, 446 SDslu, 337 SDs, 0 SdLazy, 1383 SolverSat, 391 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 967.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 366 GetRequests, 223 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 2002.9ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=7, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 98.9ms AutomataMinimizationTime, 8 MinimizatonAttempts, 84 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 12 LocationsWithAnnotation, 68 PreInvPairs, 136 NumberOfFragments, 137 HoareAnnotationTreeSize, 68 FomulaSimplifications, 46072 FormulaSimplificationTreeSizeReduction, 293.6ms HoareSimplificationTime, 12 FomulaSimplificationsInter, 5095 FormulaSimplificationTreeSizeReductionInter, 403.6ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 51.2ms SsaConstructionTime, 201.2ms SatisfiabilityAnalysisTime, 1453.5ms InterpolantComputationTime, 450 NumberOfCodeBlocks, 450 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 437 ConstructedInterpolants, 0 QuantifiedInterpolants, 1323 SizeOfPredicates, 17 NumberOfNonLiveVariables, 675 ConjunctsInSsa, 31 ConjunctsInUnsatCore, 13 InterpolantComputations, 4 PerfectInterpolantSequences, 270/296 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: 36]: Loop Invariant Derived loop invariant: ((2 * i <= j && 2 * i <= k) && j + 1 <= n) && k <= n - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 33]: Loop Invariant Derived loop invariant: ((n <= j && n <= k) && k <= n) || ((i == 0 && n <= k) && k <= n) - InvariantResult [Line: 34]: Loop Invariant Derived loop invariant: (2 * i <= j && n <= k) && k <= n RESULT: Ultimate proved your program to be correct! Received shutdown request...