/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-lit/jm2006.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:34:44,299 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:34:44,301 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:34:44,329 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:34:44,347 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:34:44,348 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:34:44,349 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:34:44,350 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:34:44,352 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:34:44,353 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:34:44,354 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:34:44,358 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:34:44,359 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:34:44,360 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:34:44,361 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:34:44,362 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:34:44,367 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:34:44,373 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:34:44,374 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:34:44,374 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:34:44,375 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 12:34:44,388 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:34:44,388 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:34:44,389 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:34:44,389 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:34:44,389 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:34:44,390 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:34:44,390 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:34:44,390 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:34:44,390 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:34:44,390 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:34:44,390 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:34:44,390 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:34:44,390 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:34:44,390 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:34:44,391 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:34:44,391 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:34:44,391 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:34:44,391 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:34:44,391 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:34:44,391 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:34:44,391 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:34:44,392 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:34:44,392 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:34:44,392 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:34:44,392 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:34:44,392 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:34:44,392 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:34:44,392 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:34:44,392 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:34:44,666 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:34:44,684 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:34:44,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:34:44,686 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:34:44,687 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:34:44,688 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/jm2006.i [2021-05-02 12:34:44,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3990174b0/2bab5168b3cc4b488a21eb82e4b5cdba/FLAGd0fa8f08a [2021-05-02 12:34:45,062 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:34:45,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/jm2006.i [2021-05-02 12:34:45,067 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3990174b0/2bab5168b3cc4b488a21eb82e4b5cdba/FLAGd0fa8f08a [2021-05-02 12:34:45,081 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3990174b0/2bab5168b3cc4b488a21eb82e4b5cdba [2021-05-02 12:34:45,083 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:34:45,084 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:34:45,086 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:34:45,086 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:34:45,089 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:34:45,089 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:34:45" (1/1) ... [2021-05-02 12:34:45,090 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5286c5ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:45, skipping insertion in model container [2021-05-02 12:34:45,090 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:34:45" (1/1) ... [2021-05-02 12:34:45,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:34:45,104 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:34:45,221 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-lit/jm2006.i[895,908] [2021-05-02 12:34:45,232 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:34:45,240 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:34:45,257 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-lit/jm2006.i[895,908] [2021-05-02 12:34:45,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:34:45,281 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:34:45,281 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:45 WrapperNode [2021-05-02 12:34:45,281 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:34:45,282 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:34:45,282 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:34:45,283 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:34:45,290 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:45" (1/1) ... [2021-05-02 12:34:45,291 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:45" (1/1) ... [2021-05-02 12:34:45,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:45" (1/1) ... [2021-05-02 12:34:45,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:45" (1/1) ... [2021-05-02 12:34:45,305 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:45" (1/1) ... [2021-05-02 12:34:45,307 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:45" (1/1) ... [2021-05-02 12:34:45,308 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:45" (1/1) ... [2021-05-02 12:34:45,313 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:34:45,314 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:34:45,314 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:34:45,314 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:34:45,315 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:45" (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 12:34:45,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:34:45,378 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:34:45,379 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:34:45,379 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-02 12:34:45,379 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:34:45,379 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:34:45,379 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:34:45,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:34:45,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-05-02 12:34:45,380 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-05-02 12:34:45,380 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:34:45,380 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:34:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-02 12:34:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:34:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-02 12:34:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:34:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:34:45,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:34:45,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:34:45,382 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:34:45,382 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:34:45,382 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:34:45,552 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:34:45,552 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 12:34:45,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:34:45 BoogieIcfgContainer [2021-05-02 12:34:45,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:34:45,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:34:45,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:34:45,556 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:34:45,556 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:34:45" (1/3) ... [2021-05-02 12:34:45,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1444b325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:34:45, skipping insertion in model container [2021-05-02 12:34:45,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:34:45" (2/3) ... [2021-05-02 12:34:45,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1444b325 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:34:45, skipping insertion in model container [2021-05-02 12:34:45,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:34:45" (3/3) ... [2021-05-02 12:34:45,558 INFO L111 eAbstractionObserver]: Analyzing ICFG jm2006.i [2021-05-02 12:34:45,574 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:34:45,576 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:34:45,587 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:34:45,599 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:34:45,599 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:34:45,599 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:34:45,599 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:34:45,600 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:34:45,600 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:34:45,600 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:34:45,600 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:34:45,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 12:34:45,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 12:34:45,611 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:45,611 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:45,612 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:45,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:45,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1244516831, now seen corresponding path program 1 times [2021-05-02 12:34:45,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:45,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236399753] [2021-05-02 12:34:45,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:45,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:45,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:45,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:45,907 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 12:34:45,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:45,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236399753] [2021-05-02 12:34:45,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1236399753] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:34:45,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:34:45,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 12:34:45,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41966359] [2021-05-02 12:34:45,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 12:34:45,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:45,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 12:34:45,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:34:45,923 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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 12:34:46,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:46,184 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2021-05-02 12:34:46,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:34:46,185 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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 13 [2021-05-02 12:34:46,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:46,188 INFO L225 Difference]: With dead ends: 47 [2021-05-02 12:34:46,189 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 12:34:46,190 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 249.3ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:34:46,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 12:34:46,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 12:34:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:46,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 12:34:46,209 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-02 12:34:46,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:46,209 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 12:34:46,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 states have internal predecessors, (9), 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 12:34:46,209 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 12:34:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 12:34:46,209 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:46,210 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:46,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:34:46,210 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:46,210 INFO L82 PathProgramCache]: Analyzing trace with hash 1450374075, now seen corresponding path program 1 times [2021-05-02 12:34:46,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:46,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902823279] [2021-05-02 12:34:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:46,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:46,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:46,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:46,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:46,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:46,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902823279] [2021-05-02 12:34:46,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902823279] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:46,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476253423] [2021-05-02 12:34:46,342 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 12:34:46,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:46,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 19 conjunts are in the unsatisfiable core [2021-05-02 12:34:46,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:46,507 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,510 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,521 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:46,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:46,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476253423] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:46,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:46,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 13 [2021-05-02 12:34:46,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078964274] [2021-05-02 12:34:46,551 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 12:34:46,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:46,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 12:34:46,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-05-02 12:34:46,552 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:46,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:46,789 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 12:34:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 12:34:46,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 12:34:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:46,791 INFO L225 Difference]: With dead ends: 22 [2021-05-02 12:34:46,791 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 12:34:46,792 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 276.8ms TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-05-02 12:34:46,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 12:34:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-05-02 12:34:46,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:46,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-05-02 12:34:46,800 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-05-02 12:34:46,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:46,801 INFO L480 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-05-02 12:34:46,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 10 states have internal predecessors, (16), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:46,801 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-05-02 12:34:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-02 12:34:46,802 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:46,806 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:47,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-02 12:34:47,021 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:47,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:47,021 INFO L82 PathProgramCache]: Analyzing trace with hash -757985953, now seen corresponding path program 2 times [2021-05-02 12:34:47,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:47,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792135600] [2021-05-02 12:34:47,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:47,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:47,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:47,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:47,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792135600] [2021-05-02 12:34:47,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792135600] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:47,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998382273] [2021-05-02 12:34:47,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:47,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:34:47,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:47,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 23 conjunts are in the unsatisfiable core [2021-05-02 12:34:47,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:47,253 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:47,257 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:47,261 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:47,289 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:47,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998382273] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:47,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:47,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-05-02 12:34:47,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404907376] [2021-05-02 12:34:47,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 12:34:47,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:47,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 12:34:47,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-05-02 12:34:47,291 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:47,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:47,611 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-05-02 12:34:47,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 12:34:47,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-05-02 12:34:47,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:47,612 INFO L225 Difference]: With dead ends: 26 [2021-05-02 12:34:47,612 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 12:34:47,613 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 352.2ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-05-02 12:34:47,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 12:34:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-02 12:34:47,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:47,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-05-02 12:34:47,621 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2021-05-02 12:34:47,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:47,621 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-05-02 12:34:47,622 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 11 states have internal predecessors, (17), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:47,622 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-05-02 12:34:47,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-02 12:34:47,622 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:34:47,622 INFO L523 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:34:47,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:47,829 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:34:47,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:34:47,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1017812769, now seen corresponding path program 3 times [2021-05-02 12:34:47,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:34:47,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901664853] [2021-05-02 12:34:47,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:34:47,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:47,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:34:47,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:34:47,952 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-02 12:34:47,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:34:47,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901664853] [2021-05-02 12:34:47,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901664853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:47,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968463780] [2021-05-02 12:34:47,953 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:47,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-02 12:34:47,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:34:47,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 31 conjunts are in the unsatisfiable core [2021-05-02 12:34:47,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:34:48,081 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,083 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,089 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:34:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:34:48,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968463780] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:34:48,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:34:48,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-05-02 12:34:48,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556817117] [2021-05-02 12:34:48,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 12:34:48,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:34:48,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 12:34:48,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-05-02 12:34:48,117 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:48,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:34:48,495 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-05-02 12:34:48,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 12:34:48,495 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.3125) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2021-05-02 12:34:48,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:34:48,496 INFO L225 Difference]: With dead ends: 21 [2021-05-02 12:34:48,496 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:34:48,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 427.1ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-05-02 12:34:48,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:34:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:34:48,496 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 12:34:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:34:48,497 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 17 [2021-05-02 12:34:48,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:34:48,497 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:34:48,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.3125) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:34:48,497 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:34:48,497 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:34:48,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:34:48,710 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:34:48,858 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 12) no Hoare annotation was computed. [2021-05-02 12:34:48,859 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 12) no Hoare annotation was computed. [2021-05-02 12:34:48,859 INFO L198 CegarLoopUtils]: For program point L12-1(line 12) no Hoare annotation was computed. [2021-05-02 12:34:48,859 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:34:48,859 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 12:34:48,860 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:34:48,862 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:34:48,862 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 12:34:48,862 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:34:48,862 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:34:48,862 INFO L198 CegarLoopUtils]: For program point L15(line 15) no Hoare annotation was computed. [2021-05-02 12:34:48,862 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notENTRY(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:34:48,862 INFO L198 CegarLoopUtils]: For program point L15-2(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:34:48,863 INFO L198 CegarLoopUtils]: For program point assume_abort_if_notEXIT(lines 14 16) no Hoare annotation was computed. [2021-05-02 12:34:48,863 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 24 39) the Hoare annotation is: true [2021-05-02 12:34:48,863 INFO L194 CegarLoopUtils]: At program point L31-2(lines 31 34) the Hoare annotation is: (let ((.cse1 (+ main_~x~0 main_~j~0)) (.cse0 (+ main_~i~0 main_~y~0))) (and (<= .cse0 .cse1) (<= .cse1 .cse0))) [2021-05-02 12:34:48,863 INFO L198 CegarLoopUtils]: For program point L28(line 28) no Hoare annotation was computed. [2021-05-02 12:34:48,863 INFO L198 CegarLoopUtils]: For program point L31-3(lines 24 39) no Hoare annotation was computed. [2021-05-02 12:34:48,863 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 24 39) no Hoare annotation was computed. [2021-05-02 12:34:48,863 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 24 39) no Hoare annotation was computed. [2021-05-02 12:34:48,864 INFO L194 CegarLoopUtils]: At program point L36(line 36) the Hoare annotation is: (and (<= main_~y~0 0) (< 0 (+ main_~y~0 1))) [2021-05-02 12:34:48,864 INFO L198 CegarLoopUtils]: For program point L35(lines 35 37) no Hoare annotation was computed. [2021-05-02 12:34:48,864 INFO L198 CegarLoopUtils]: For program point L18-2(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:34:48,864 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 17 22) the Hoare annotation is: true [2021-05-02 12:34:48,864 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 17 22) no Hoare annotation was computed. [2021-05-02 12:34:48,864 INFO L198 CegarLoopUtils]: For program point L19(line 19) no Hoare annotation was computed. [2021-05-02 12:34:48,865 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 19) no Hoare annotation was computed. [2021-05-02 12:34:48,865 INFO L198 CegarLoopUtils]: For program point L18(lines 18 20) no Hoare annotation was computed. [2021-05-02 12:34:48,876 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:34:48 BoogieIcfgContainer [2021-05-02 12:34:48,876 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:34:48,876 INFO L168 Benchmark]: Toolchain (without parser) took 3792.42 ms. Allocated memory was 190.8 MB in the beginning and 229.6 MB in the end (delta: 38.8 MB). Free memory was 156.0 MB in the beginning and 97.6 MB in the end (delta: 58.4 MB). Peak memory consumption was 96.3 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:48,876 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 190.8 MB. Free memory is still 172.4 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:34:48,877 INFO L168 Benchmark]: CACSL2BoogieTranslator took 195.63 ms. Allocated memory is still 190.8 MB. Free memory was 155.8 MB in the beginning and 173.8 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:48,877 INFO L168 Benchmark]: Boogie Preprocessor took 30.96 ms. Allocated memory is still 190.8 MB. Free memory was 173.8 MB in the beginning and 172.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:48,877 INFO L168 Benchmark]: RCFGBuilder took 239.19 ms. Allocated memory is still 190.8 MB. Free memory was 172.2 MB in the beginning and 158.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:48,877 INFO L168 Benchmark]: TraceAbstraction took 3321.49 ms. Allocated memory was 190.8 MB in the beginning and 229.6 MB in the end (delta: 38.8 MB). Free memory was 157.5 MB in the beginning and 97.6 MB in the end (delta: 59.9 MB). Peak memory consumption was 99.2 MB. Max. memory is 8.0 GB. [2021-05-02 12:34:48,877 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 190.8 MB. Free memory is still 172.4 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 195.63 ms. Allocated memory is still 190.8 MB. Free memory was 155.8 MB in the beginning and 173.8 MB in the end (delta: -17.9 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.96 ms. Allocated memory is still 190.8 MB. Free memory was 173.8 MB in the beginning and 172.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 239.19 ms. Allocated memory is still 190.8 MB. Free memory was 172.2 MB in the beginning and 158.1 MB in the end (delta: 14.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3321.49 ms. Allocated memory was 190.8 MB in the beginning and 229.6 MB in the end (delta: 38.8 MB). Free memory was 157.5 MB in the beginning and 97.6 MB in the end (delta: 59.9 MB). Peak memory consumption was 99.2 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, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3111.1ms, OverallIterations: 4, TraceHistogramMax: 4, EmptinessCheckTime: 6.2ms, AutomataDifference: 1220.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 148.9ms, InitialAbstractionConstructionTime: 6.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 45 SDtfs, 91 SDslu, 183 SDs, 0 SdLazy, 406 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 225.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 121 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 1305.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=21occurred in iteration=0, InterpolantAutomatonStates: 46, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 26.7ms AutomataMinimizationTime, 4 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 13 PreInvPairs, 24 NumberOfFragments, 53 HoareAnnotationTreeSize, 13 FomulaSimplifications, 212 FormulaSimplificationTreeSizeReduction, 55.0ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 407 FormulaSimplificationTreeSizeReductionInter, 88.3ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 25.8ms SsaConstructionTime, 105.1ms SatisfiabilityAnalysisTime, 929.4ms InterpolantComputationTime, 105 NumberOfCodeBlocks, 105 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 98 ConstructedInterpolants, 0 QuantifiedInterpolants, 638 SizeOfPredicates, 12 NumberOfNonLiveVariables, 293 ConjunctsInSsa, 73 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 1/28 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: 31]: Loop Invariant Derived loop invariant: i + y <= x + j && x + j <= i + y RESULT: Ultimate proved your program to be correct! Received shutdown request...