/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 12:04:38,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 12:04:38,315 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 12:04:38,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-02 12:04:38,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 12:04:38,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 12:04:38,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 12:04:38,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 12:04:38,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 12:04:38,371 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 12:04:38,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 12:04:38,378 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 12:04:38,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 12:04:38,382 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 12:04:38,382 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 12:04:38,384 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 12:04:38,388 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-02 12:04:38,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 12:04:38,395 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 12:04:38,395 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 12:04:38,396 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 12:04:38,426 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 12:04:38,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 12:04:38,427 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-02 12:04:38,427 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-02 12:04:38,427 INFO L138 SettingsManager]: * Use SBE=true [2021-05-02 12:04:38,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 12:04:38,428 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 12:04:38,428 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 12:04:38,428 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 12:04:38,428 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 12:04:38,428 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 12:04:38,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 12:04:38,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 12:04:38,428 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 12:04:38,429 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 12:04:38,429 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 12:04:38,429 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 12:04:38,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 12:04:38,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 12:04:38,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 12:04:38,429 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 12:04:38,429 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 12:04:38,429 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-02 12:04:38,429 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-02 12:04:38,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-02 12:04:38,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-02 12:04:38,430 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 12:04:38,430 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-05-02 12:04:38,430 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 12:04:38,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 12:04:38,697 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 12:04:38,699 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 12:04:38,700 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 12:04:38,701 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 12:04:38,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2021-05-02 12:04:38,743 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db8edce17/4b6faf7079cf48faa68a535f178a96b2/FLAG3d38ab0d3 [2021-05-02 12:04:39,101 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 12:04:39,102 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2021-05-02 12:04:39,106 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db8edce17/4b6faf7079cf48faa68a535f178a96b2/FLAG3d38ab0d3 [2021-05-02 12:04:39,534 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/db8edce17/4b6faf7079cf48faa68a535f178a96b2 [2021-05-02 12:04:39,539 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 12:04:39,541 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 12:04:39,543 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 12:04:39,544 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 12:04:39,550 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 12:04:39,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:04:39" (1/1) ... [2021-05-02 12:04:39,553 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3dadca06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:39, skipping insertion in model container [2021-05-02 12:04:39,553 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 12:04:39" (1/1) ... [2021-05-02 12:04:39,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 12:04:39,568 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 12:04:39,650 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c[321,334] [2021-05-02 12:04:39,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:04:39,664 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 12:04:39,671 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/const_1-1.c[321,334] [2021-05-02 12:04:39,673 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 12:04:39,682 INFO L208 MainTranslator]: Completed translation [2021-05-02 12:04:39,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:39 WrapperNode [2021-05-02 12:04:39,682 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 12:04:39,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 12:04:39,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 12:04:39,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 12:04:39,697 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:39" (1/1) ... [2021-05-02 12:04:39,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:39" (1/1) ... [2021-05-02 12:04:39,702 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:39" (1/1) ... [2021-05-02 12:04:39,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:39" (1/1) ... [2021-05-02 12:04:39,704 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:39" (1/1) ... [2021-05-02 12:04:39,707 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:39" (1/1) ... [2021-05-02 12:04:39,707 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:39" (1/1) ... [2021-05-02 12:04:39,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 12:04:39,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 12:04:39,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 12:04:39,734 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 12:04:39,735 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:39" (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 12:04:39,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 12:04:39,807 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 12:04:39,807 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 12:04:39,807 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 12:04:39,808 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 12:04:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 12:04:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 12:04:39,808 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 12:04:39,809 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 12:04:39,809 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 12:04:39,809 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 12:04:39,809 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 12:04:39,809 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 12:04:39,810 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 12:04:39,811 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 12:04:39,811 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 12:04:39,811 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 12:04:39,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 12:04:39,941 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 12:04:39,941 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:04:39 BoogieIcfgContainer [2021-05-02 12:04:39,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 12:04:39,943 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 12:04:39,943 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 12:04:39,945 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 12:04:39,945 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 12:04:39" (1/3) ... [2021-05-02 12:04:39,945 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62443999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:04:39, skipping insertion in model container [2021-05-02 12:04:39,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 12:04:39" (2/3) ... [2021-05-02 12:04:39,946 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62443999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 12:04:39, skipping insertion in model container [2021-05-02 12:04:39,946 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 12:04:39" (3/3) ... [2021-05-02 12:04:39,947 INFO L111 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2021-05-02 12:04:39,950 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-02 12:04:39,953 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 12:04:39,964 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 12:04:39,978 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 12:04:39,978 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 12:04:39,978 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-02 12:04:39,979 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 12:04:39,979 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 12:04:39,979 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 12:04:39,979 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 12:04:39,979 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 12:04:39,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 12:04:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 12:04:39,991 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:39,992 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:39,992 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:39,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:39,995 INFO L82 PathProgramCache]: Analyzing trace with hash -219174432, now seen corresponding path program 1 times [2021-05-02 12:04:40,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:40,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805967854] [2021-05-02 12:04:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:40,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,190 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 12:04:40,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:40,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805967854] [2021-05-02 12:04:40,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805967854] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:40,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:04:40,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 12:04:40,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065229055] [2021-05-02 12:04:40,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 12:04:40,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:40,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 12:04:40,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:04:40,211 INFO L87 Difference]: Start difference. First operand has 18 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:40,270 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2021-05-02 12:04:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 12:04:40,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 12:04:40,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:40,276 INFO L225 Difference]: With dead ends: 29 [2021-05-02 12:04:40,276 INFO L226 Difference]: Without dead ends: 12 [2021-05-02 12:04:40,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 12:04:40,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-05-02 12:04:40,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-05-02 12:04:40,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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 12:04:40,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-05-02 12:04:40,306 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 11 [2021-05-02 12:04:40,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:40,307 INFO L480 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-05-02 12:04:40,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,307 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-05-02 12:04:40,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-02 12:04:40,308 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:40,309 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:40,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 12:04:40,309 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:40,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:40,312 INFO L82 PathProgramCache]: Analyzing trace with hash -222868516, now seen corresponding path program 1 times [2021-05-02 12:04:40,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:40,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088518490] [2021-05-02 12:04:40,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:40,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,427 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 12:04:40,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:40,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088518490] [2021-05-02 12:04:40,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088518490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:40,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 12:04:40,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 12:04:40,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753713542] [2021-05-02 12:04:40,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 12:04:40,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:40,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 12:04:40,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 12:04:40,435 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:40,486 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-05-02 12:04:40,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 12:04:40,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-02 12:04:40,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:40,488 INFO L225 Difference]: With dead ends: 18 [2021-05-02 12:04:40,488 INFO L226 Difference]: Without dead ends: 13 [2021-05-02 12:04:40,489 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-02 12:04:40,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-05-02 12:04:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-05-02 12:04:40,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 12:04:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-05-02 12:04:40,496 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-05-02 12:04:40,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:40,497 INFO L480 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-05-02 12:04:40,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,498 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-05-02 12:04:40,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 12:04:40,498 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:40,499 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:40,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 12:04:40,499 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:40,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:40,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1717471862, now seen corresponding path program 1 times [2021-05-02 12:04:40,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:40,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728264520] [2021-05-02 12:04:40,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:40,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,629 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 12:04:40,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:40,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728264520] [2021-05-02 12:04:40,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728264520] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:40,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898897189] [2021-05-02 12:04:40,630 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 12:04:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:40,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-02 12:04:40,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:40,743 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 12:04:40,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898897189] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:40,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:40,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-05-02 12:04:40,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487574876] [2021-05-02 12:04:40,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 12:04:40,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 12:04:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-02 12:04:40,746 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:40,817 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-05-02 12:04:40,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 12:04:40,818 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 12:04:40,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:40,818 INFO L225 Difference]: With dead ends: 19 [2021-05-02 12:04:40,818 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 12:04:40,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-05-02 12:04:40,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 12:04:40,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 12:04:40,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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 12:04:40,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 12:04:40,827 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 12:04:40,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:40,827 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 12:04:40,827 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:40,828 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 12:04:40,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-02 12:04:40,828 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:40,828 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:41,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-05-02 12:04:41,041 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:41,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:41,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1738481436, now seen corresponding path program 2 times [2021-05-02 12:04:41,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:41,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044129547] [2021-05-02 12:04:41,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:41,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,133 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 12:04:41,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:41,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044129547] [2021-05-02 12:04:41,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044129547] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864169805] [2021-05-02 12:04:41,134 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 12:04:41,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-02 12:04:41,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:41,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 7 conjunts are in the unsatisfiable core [2021-05-02 12:04:41,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:41,241 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-05-02 12:04:41,258 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 12:04:41,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864169805] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-02 12:04:41,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-05-02 12:04:41,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996772841] [2021-05-02 12:04:41,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 12:04:41,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:41,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 12:04:41,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-05-02 12:04:41,261 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:41,374 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-05-02 12:04:41,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 12:04:41,375 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-05-02 12:04:41,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:41,375 INFO L225 Difference]: With dead ends: 20 [2021-05-02 12:04:41,375 INFO L226 Difference]: Without dead ends: 15 [2021-05-02 12:04:41,376 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:04:41,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-05-02 12:04:41,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-05-02 12:04:41,378 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 12:04:41,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 12:04:41,378 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-05-02 12:04:41,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:41,378 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 12:04:41,379 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,379 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 12:04:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 12:04:41,379 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 12:04:41,379 INFO L523 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 12:04:41,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:41,595 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 12:04:41,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 12:04:41,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1905189066, now seen corresponding path program 3 times [2021-05-02 12:04:41,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-02 12:04:41,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951676725] [2021-05-02 12:04:41,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 12:04:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 12:04:41,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 12:04:41,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 12:04:41,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-02 12:04:41,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951676725] [2021-05-02 12:04:41,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951676725] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-02 12:04:41,672 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957606278] [2021-05-02 12:04:41,672 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 12:04:41,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-05-02 12:04:41,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-02 12:04:41,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-02 12:04:41,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-02 12:04:41,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-02 12:04:41,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957606278] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 12:04:41,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-05-02 12:04:41,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 10 [2021-05-02 12:04:41,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387591471] [2021-05-02 12:04:41,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 12:04:41,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-02 12:04:41,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 12:04:41,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-05-02 12:04:41,761 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 12:04:41,781 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-05-02 12:04:41,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 12:04:41,781 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 12:04:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 12:04:41,781 INFO L225 Difference]: With dead ends: 15 [2021-05-02 12:04:41,781 INFO L226 Difference]: Without dead ends: 0 [2021-05-02 12:04:41,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 66.3ms TimeCoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-05-02 12:04:41,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-05-02 12:04:41,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-05-02 12:04:41,782 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 12:04:41,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-05-02 12:04:41,788 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 14 [2021-05-02 12:04:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 12:04:41,788 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-05-02 12:04:41,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 12:04:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-05-02 12:04:41,789 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-05-02 12:04:42,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-02 12:04:42,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-05-02 12:04:42,100 INFO L198 CegarLoopUtils]: For program point reach_errorEXIT(line 3) no Hoare annotation was computed. [2021-05-02 12:04:42,100 INFO L198 CegarLoopUtils]: For program point reach_errorENTRY(line 3) no Hoare annotation was computed. [2021-05-02 12:04:42,108 INFO L198 CegarLoopUtils]: For program point reach_errorFINAL(line 3) no Hoare annotation was computed. [2021-05-02 12:04:42,109 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:04:42,109 INFO L194 CegarLoopUtils]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#t~string5.base| |old(#t~string5.base)|) (= |#t~string5.offset| |old(#t~string5.offset)|) (= |old(#length)| |#length|) (= |#t~string6.base| |old(#t~string6.base)|) (= |#t~string6.offset| |old(#t~string6.offset)|) (= |#t~string4.base| |old(#t~string4.base)|) (= |#NULL.base| |old(#NULL.base)|) (= |#t~string4.offset| |old(#t~string4.offset)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2021-05-02 12:04:42,109 INFO L198 CegarLoopUtils]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:04:42,109 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-05-02 12:04:42,109 INFO L201 CegarLoopUtils]: At program point L-1(line -1) the Hoare annotation is: true [2021-05-02 12:04:42,109 INFO L201 CegarLoopUtils]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2021-05-02 12:04:42,109 INFO L198 CegarLoopUtils]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-05-02 12:04:42,109 INFO L201 CegarLoopUtils]: At program point mainENTRY(lines 12 22) the Hoare annotation is: true [2021-05-02 12:04:42,109 INFO L198 CegarLoopUtils]: For program point mainEXIT(lines 12 22) no Hoare annotation was computed. [2021-05-02 12:04:42,109 INFO L194 CegarLoopUtils]: At program point L16-2(lines 16 19) the Hoare annotation is: (or (= main_~y~0 0) (= main_~x~0 0)) [2021-05-02 12:04:42,109 INFO L194 CegarLoopUtils]: At program point L16-3(lines 16 19) the Hoare annotation is: (= main_~x~0 0) [2021-05-02 12:04:42,109 INFO L198 CegarLoopUtils]: For program point mainFINAL(lines 12 22) no Hoare annotation was computed. [2021-05-02 12:04:42,109 INFO L201 CegarLoopUtils]: At program point __VERIFIER_assertENTRY(lines 5 10) the Hoare annotation is: true [2021-05-02 12:04:42,110 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertEXIT(lines 5 10) no Hoare annotation was computed. [2021-05-02 12:04:42,110 INFO L198 CegarLoopUtils]: For program point L7(line 7) no Hoare annotation was computed. [2021-05-02 12:04:42,110 INFO L198 CegarLoopUtils]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-05-02 12:04:42,110 INFO L198 CegarLoopUtils]: For program point L6-2(lines 5 10) no Hoare annotation was computed. [2021-05-02 12:04:42,110 INFO L198 CegarLoopUtils]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 7) no Hoare annotation was computed. [2021-05-02 12:04:42,121 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.05 12:04:42 BoogieIcfgContainer [2021-05-02 12:04:42,121 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-02 12:04:42,123 INFO L168 Benchmark]: Toolchain (without parser) took 2580.57 ms. Allocated memory is still 194.0 MB. Free memory was 158.2 MB in the beginning and 87.3 MB in the end (delta: 70.9 MB). Peak memory consumption was 71.5 MB. Max. memory is 8.0 GB. [2021-05-02 12:04:42,123 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 194.0 MB. Free memory is still 174.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-02 12:04:42,124 INFO L168 Benchmark]: CACSL2BoogieTranslator took 146.41 ms. Allocated memory is still 194.0 MB. Free memory was 158.0 MB in the beginning and 177.2 MB in the end (delta: -19.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-05-02 12:04:42,127 INFO L168 Benchmark]: Boogie Preprocessor took 43.05 ms. Allocated memory is still 194.0 MB. Free memory was 177.2 MB in the beginning and 177.5 MB in the end (delta: -310.8 kB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-05-02 12:04:42,127 INFO L168 Benchmark]: RCFGBuilder took 207.68 ms. Allocated memory is still 194.0 MB. Free memory was 177.5 MB in the beginning and 164.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-05-02 12:04:42,128 INFO L168 Benchmark]: TraceAbstraction took 2178.09 ms. Allocated memory is still 194.0 MB. Free memory was 163.9 MB in the beginning and 87.3 MB in the end (delta: 76.6 MB). Peak memory consumption was 78.2 MB. Max. memory is 8.0 GB. [2021-05-02 12:04:42,133 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 194.0 MB. Free memory is still 174.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 146.41 ms. Allocated memory is still 194.0 MB. Free memory was 158.0 MB in the beginning and 177.2 MB in the end (delta: -19.3 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 43.05 ms. Allocated memory is still 194.0 MB. Free memory was 177.2 MB in the beginning and 177.5 MB in the end (delta: -310.8 kB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 207.68 ms. Allocated memory is still 194.0 MB. Free memory was 177.5 MB in the beginning and 164.4 MB in the end (delta: 13.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2178.09 ms. Allocated memory is still 194.0 MB. Free memory was 163.9 MB in the beginning and 87.3 MB in the end (delta: 76.6 MB). Peak memory consumption was 78.2 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 7]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 2028.3ms, OverallIterations: 5, TraceHistogramMax: 3, EmptinessCheckTime: 7.2ms, AutomataDifference: 351.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 94.7ms, InitialAbstractionConstructionTime: 7.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 56 SDtfs, 28 SDslu, 69 SDs, 0 SdLazy, 69 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 97.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 73 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 351.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=0, InterpolantAutomatonStates: 23, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 42.0ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 7 LocationsWithAnnotation, 11 PreInvPairs, 15 NumberOfFragments, 45 HoareAnnotationTreeSize, 11 FomulaSimplifications, 83 FormulaSimplificationTreeSizeReduction, 27.7ms HoareSimplificationTime, 7 FomulaSimplificationsInter, 161 FormulaSimplificationTreeSizeReductionInter, 60.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 36.6ms SsaConstructionTime, 143.4ms SatisfiabilityAnalysisTime, 596.3ms InterpolantComputationTime, 100 NumberOfCodeBlocks, 99 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 324 SizeOfPredicates, 3 NumberOfNonLiveVariables, 286 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 6/20 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: 16]: Loop Invariant Derived loop invariant: y == 0 || x == 0 RESULT: Ultimate proved your program to be correct! Received shutdown request...